Scholarly article on topic 'A mixed method feasibility study of a patient- and family-centred advance care planning intervention for cancer patients'

A mixed method feasibility study of a patient- and family-centred advance care planning intervention for cancer patients Academic research paper on "Health sciences"

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BMC Palliative Care
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Academic research paper on topic "A mixed method feasibility study of a patient- and family-centred advance care planning intervention for cancer patients"

Michael et al. BMC Palliative Care DOI 10.1186/s12904-015-0023-1

Palliative Care


A mixed method feasibility study of a patient- and family-centred advance care planning intervention for cancer patients

Natasha Michael1,2", Clare O'Callaghan'3'4,5, Angela Baird1, Karla Gough5, Mei Krishnasamy5,6 Nathaniel Hiscock2 and Josephine Clayton7



Background: Advance care planning (ACP) is a process whereby values and goals are sensitively explored and documented to uphold patients' wishes should they become incompetent to make decisions in the future. Evidenced-based, effective approaches are needed. This study sought to assess the feasibility and acceptability of an ACP intervention informed by phase 1 findings and assessed the suitability of measures for a phase 3 trial. Methods: Prospective, longitudinal, mixed methods study with convenience sampling. A skilled facilitator conducted an ACP intervention with stage III/IV cancer patients and invited caregivers. It incorporated the vignette technique and optional completion/integration of ACP documents into electronic medical records (EMR). Quantitative and qualitative data were collected concurrently, analysed separately, and the two sets of findings converged.

Results: Forty-seven percent consent rate with 30 patients and 26 caregivers completing the intervention. Ninety percent of patient participants had not or probably not written future care plans. Compliance with assessments was high and missing responses to items low. Small- to medium-sized changes were observed on a number of patients and caregiver completed measures, but confidence intervals were typically wide and most included zero. An increase in distress was reported; however, all believed the intervention should be made available. Eleven documents from nine patients were incorporated into EMR. ACP may not be furthered because of intervention inadequacies, busy lives, and reluctance to plan ahead.

Conclusions: In this phase 2 study we demonstrated feasibility of recruitment and acceptability of the ACP intervention and most outcome measures. However, patient/family preferences about when and whether to document ACP components need to be respected. Thus flexibility to accommodate variability in intervention delivery, tailored to individual patient/family preferences, may be required for phase 3 research.

Keywords: Advanced care planning, Palliative care, Patients, Caregivers, Cancer, Mixed methods research


Decision-making in cancer care is increasingly complex as therapeutic options increase alongside ongoing ambiguity about acceptable outcomes for patients with advanced illness. Unexpected patient deterioration may necessitate difficult conversations and ad hoc decision-

* Correspondence:

1 Palliative Care Service, Cabrini Health, 646 High Street, Prahran, Victoria 3181, Australia

2Faculty of Medicine, Nursing and Health Sciences, Monash University, Victoria 3800, Australia

Fulllist of author information is available at the end of the article

Bio Med Central

making, contributing to significant patient and family distress [1]. Early conversations between patients, caregivers and health professionals are encouraged to ascertain when cancer patients may want to consider treatment limitations to avoid inappropriate and aggressive care at advanced stages of illness [2,3].

Advance care planning (ACP) is a process whereby values and goals are sensitively explored and documented to uphold patients' wishes should they become incompetent to make decisions in the future [4]. ACP conversations have broader benefits in enhancing patient

© 2015 Michael et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creative applies to the data made available in this article, unless otherwise stated.

[5] and caregiver [6] confidence, encouraging involvement in health care decision-making and allowing for consideration for additional end-of-life contingencies whilst the patient is still competent. It is thus a core quality indicator in cancer care [7], intended to improve the quality of death and family bereavement experiences [8].

ACP in Australia is increasingly implemented and accepted across health and community sectors [9], with limited uptake of advance directives, variances across state legislation and a national framework [10] developed to promote uniformity in practice. However, ACP in the Australian cancer context is not routine and remains underexplored. Its association with loss of hope [11,12], oncologists' reticence in initiating ACP conversations [13,14], variances in preferences for prognostic information [15], occasional discrepancy between patients' and caregivers' desire for shared end of life (EOL) discussions [6], and the iterative and dynamic nature of EOL decision-making [16] confound healthcare workers' considerations about optimal and timely information provision in the cancer context.

Given challenges associated with EOL conversations [17,18], structured interventions [19] and decision aids [20] are encouraged to promote understanding of management options and decision-making. Decision aids for ACP in particular allow for a systemized approach to inform patients about care options, prompting them to document and communicate their preferences [20]. However, studies utilizing oral and printed information, video material, patient narratives, and case vignettes [19,21-25] have produced varying results. A systematic review of 55 studies assessing ACP interventions with older adults found that patients preferred to discuss future health care plans with family rather than healthcare providers, complete informal (35.9%) rather than formal (22.7%) plans, and advanced directive completion rates improved when professional teams provided assistance across multiple sessions [22]. Furthermore, a Cochrane review of 131 decision aids in varied clinical contexts demonstrated positive effects on decision-making. Compared to usual care, decision aids were associated with reduced decisional conflict and improved: knowledge of options and their potential benefits, harms, and outcomes; participation in decision-making; and congruence between values and choices [26].

Yet many trials of ACP interventions or decision aids omit preliminary investigation of clinical efficacy, safety, recruitment potential, and resource requirements [21,27-29]. Given limited evidence for cancer specific ACP interventions, a research project commenced in 2012 in accordance with the Medical Research Council framework for developing complex interventions [30]. The aim of this phase 2 study was to assess the feasibility and acceptability of an ACP

intervention which incorporated basic principles of local [9] and international [31,32] ACP programs as well as findings from completed phase 1 studies [6,16]. It also aimed to assess feasibility of measures to be used in a phase 3 trial of the intervention.



A prospective longitudinal mixed methods study with convenience sampling was used [33]. The ACP intervention was conducted by an experienced oncology nurse, with post graduate training in palliative care and many years experience conducting end-of-life conversations with cancer patients. It included a 5 step guided process as described in Figure 1 (online - Additional file 1). Development of the ACP intervention was informed by phase 1 findings on cancer patients' and caregivers' ACP related views and their recommendations for ACP program development [6,16]. The study included patient nominated caregiver presence, and optional completion and integration of patients' ACP documents into the hospital's electronic medical records (EMR). ACP documents which could be offered included an Enduring Power of Attorney (Medical Treatment) (EPOAMT) form, a researcher created 'statement of choices' form, and Refusal of Treatment Certificate. An EPOAMT is the Victorian (state of Australia) term to denote one's designated and lawful substitute medical decision maker and a 'statement of choices' is the Australian term for documents where people state their wishes to assist substitute decision makers and doctors making decisions on their behalf. A Refusal of Treatment Certificate allows Victorian people to "legally refuse treatment generally or of a particular kind for a current condition" [9]. It also incorporated four clinical case vignettes, developed and tested in Phase 1 to initiate and support ACP discussions [6,16]. The clinical vignettes were used within the intervention to highlight circumstances where an ACP could assist families and professionals with appropriate end-of-life conversations and patient care decisions. Vignettes are useful when exploring sensitive issues [34] to assist participants reflect from a less threatening third person perspective and to introduce personal experiences when desired [35].

Participants and setting

This study was conducted at a large specialist oncology facility in Australia. Participants were recruited from the lung, gastrointestinal, sarcoma, head and neck and urological streams between February and July 2013. Ethics approval was obtained from the Peter MacCallum Cancer Centre's Human Research Ethics Committee.

Recruitment was limited to English speaking cancer patients and caregivers 18 years or older, previously

Identified eligible participants

Approached eligible participants

Trained ACP facilitator (AB) approached eligible participants by telephone or in person. Interested participants provided with Participant Information and Consent Form.

Obtained formal consent

Scheduled date for Baseline/T2 assessment and ACP intervention

Mailed Pre-baseline/T1 questionnaire pack to consenting participants

Patient pre-baseline pack

Patient information sheet on ACP, EQ-5D-3L,1 FACT-G,2 Modified Lyons ACP Survey,3 PPAIQ,4 QPCCS5

Caregiver pre-baseline pack

Caregiver information sheet on ACP, PPAIQ

Pre-baseline/T1 assessment

Pie-baseline questionnaires for patients and caregivers completed before first research meeting.

Baseline/T2 assessment and ACP intervention Patient completed DCS6 and ACP intervention administered by trained facilitator. The intervention included

1. Identifying and exploring gaps in knowledge and understanding of ACP

2. Eliciting understanding of the role of ACP in cancer

3. Tailoring the intervention to address unique decision-making needs and preferences

4. Supporting the actualisation of an advance care plan

5. Summarising interview and assessment for additional support

1 week post-intervention/T3 assessment

Senior researcher conducted and audio-taped semi-structured interviews (see Supplemental Appendix S1) with patients and caregivers separately to obtain a comprehensive summary of their ACP understanding, views about the intervention and related thoughts, conversations and actions since the intervention. Patient completed DCS

4 weeks post-intervention/T4 assessment

Patient and caregivers completed 4 weeks post-intervention questionnaires in phone

interview with senior researcher

Patient: EQ-5D-3L, PPAIQ, QPCCS, DCS

Caregiver: PPAIQ

System check list to be completed

ACP facilitator recorded the number and nature of written ACP components completed, including medical enduring power of attorney, statement of choices and refusal of treatment documents. ACP section in EMR was updated.

1. Euroqual (EQ-5D-3L)

Measures health outcomes applicable to a wide range of health conditions and treatments and covers the domains of mobility, self-care, usual activities, pain/discomfort, and anxiety/depression and a VAS recording respondents' self-related health.

2. The Functional Assessment of Cancer Therapy (FACT-G version 4/6

A general quality of life instrument validated in the general cancer population. It encompasses physical, social/family, emotional and functional well-being.

3. The Lyon ACP Survey

This survey was modified from its original to gather information about whether and how patients have considered, discussed, and/or completed ACP components.

4. Pre-post ACP Intervention VAS Questionnaire (PPAIQ)

The questionnaire, designed by the researchers, comprised 9 (patient) or 8 (caregiver) items, exploring understanding and perspectives on ACP, rated on a scale of 0-10 anchored by word descriptors at each end.

5. Quality of Patient-Clinician Communication Scale (QPCCS)

Assessed quality of patient-clinician communication about end-of-life care clinicians listening skills, attentiveness, care and understanding of EOL treatment preferences.

6. Decision Conflict Scale (DCS)

Measures personal perceptions about uncertainty in choosing options, factors which contribute to the uncertainty, and the effectiveness of one's decision-making.

Figure 1 Study schema [56].

unknown to the intervention facilitator and research interviewer, and had not participated in the phase 1 studies. Patients also had stage III/IV disease, prognosis of > 6 weeks, and Australian Karnofsky Performance status > 40.

Study procedure

The study procedure, measures used, and brief description of the intervention are in Figure 1. A detailed description of the ACP intervention is available online (Additional file 1).

Sample size

The pragmatic sample size of thirty patient-caregiver dyads was expected based on Phase 1 recruitment [6,16] and funds available.


Quantitative and qualitative data were collected concurrently, analysed separately, and the two sets of findings converged [36].

Statistical analysis

All quantitative analysis was performed through SPSS Windows Version 21.0 [37]. Prior to formal analysis, descriptive statistics and graphical displays were used to identify missing values and to examine the data distribution. Descriptive statistics were also used to summarise characteristics relevant to participant flow, compliance with assessments and questionnaires, pre-baseline participant characteristics (patients and care-givers) and responses to study measures.

For the Euroqual-5D (EQ-5D-3L) [38] and Pre-post ACP Intervention Questionnaire (PPAIQ), paired-samples t-tests were used to calculate estimates of change at T4 from T1 with 95% confidence intervals. Analysis of the Decisional Conflict Scale (DCS) [39] was carried out by fitting a linear mixed model to all available data. A reference cell model was used to estimate mean changes from T2 at follow-up assessment with 95% confidence intervals [40]. The mixed model was estimated by maximum likelihood and an unstructured covariance type was used to model the covari-ance structure among repeated measures. Effect size (ES) estimates were calculated to characterise the size of before and after changes [41]; these were interpreted as per Cohen's d (0.2, small; 0.5, medium; and 0.8, large change) [42].

Qualitative analysis

Analytic strategies were derived from grounded theory methods [43]. Patient and caregiver transcribed interviews underwent inductive, cyclic and constant comparative analysis. Initially, patient and caregiver data were separately coded and comparable codes grouped into sub-categories. Patient and caregiver sub-categories were then compared and grouped into categories. Comparable categories were grouped into themes. Qualitative data management software was used [44]. Initial analysis was conducted by CO with subsequent inter-rater reliability [45] provided by NM and AB.


Trial profile

Of 127 patients eligible for the study (Figure 2), 64 were approached and 30 consented (47% consent rate)

between February and July 2013. Insufficient research personnel resulted in 63 eligible patients not being approached. Twenty-six caregivers also consented. One patient did not have a caregiver, one caregiver declined, and two could not attend the intervention. Patient and caregiver baseline characteristics are summarised in Table 1.

Need for intervention

Modified Lyon ACP [46] survey responses assessed at baseline are summarised in Table 2. Seventy percent had not written and 20% had probably not written about future health plans. Few (7%) had heard about and completed an ACP. At least 67% had not completed an EPOAMT and had never discussed their wishes for care at the EOL.

Intervention fidelity and characteristics

All 30 patients completed the ACP intervention, including 26 with nominated caregivers. Seventeen interventions were completed at the specialist oncology facility (9 outpatients, 5 inpatients, 3 in day chemotherapy unit) and 13 at patients' homes. Mean ACP intervention completion time was 44 (SD 9) minutes.

Compliance with assessments and questionnaires

Apart from 1 week post-intervention/T3 (77%), compliance with assessments was high for patients (>87%) and caregivers (>92%). Missing responses to items comprising each questionnaire was very low for patients (<2.5%) and caregivers (<1.0%).

Estimate of change

Descriptives for study measures EQ-5D-3L and DCS, completed by patients at pre-baseline, baseline and follow-up assessments, are in Table 3. Descriptives were not calculated for the Quality of Patient-Clinician Communication Scale (QPCCS) [47] due to the high rate of missing data. Descriptives for study measures completed by caregivers are available from the authors.

Estimates of change and effect size for study measures completed by patients only (EQ-5D-3L, DCS) and by patients and caregivers (PPAIQ) are in Table 4.

a) Decision conflict scale (DCS)

For patients, an improvement of 4.7 points (95% CI: -11.6, 2.2; ES = 0.29) was observed on the DCS Total score, indicating lower decisional conflict at 4 weeks postintervention. Taking into consideration the rescaling of summed responses to items comprising the DCS Total score, this is the equivalent of about a 1-point change of improvement on any three DCS items (or, alternatively, a 3-point change of improvement on one item). In terms of DCS sub scores, the magnitude of change was greatest for

Figure 2 CONSORT participant flow.

values clarity (ES = 0.39), support (ES = 0.32) and uncertainty (ES = 0.31), reflecting small-sized improvements in clarity, perceived support in decision-making, and certainty about a better choice being made.

b) Pre-post ACP intervention questionnaire (PPAIQ)

Patients' responses to questions 1 and 2 of the PPAIQ indicated medium-sized improvements of 1.2 (95% CI: -0.02, 2.3; ES = 0.50) and 1.1 (95% CI: -0.01, 2.2; ES = 0.58) points

by 4 weeks post-intervention in understanding of ACP and satisfaction associated with opportunities to consider possible future health care needs and wishes with health care professionals. An increase of 1.1 points (95% CI: 0.2, 2.0; ES = 0.50) was also observed on question 3 at the last follow-up, indicating a medium-sized increase in patients' level of distress associated with thinking about possible future health care needs and wishes if they became unwell.

Table 1 Participant characteristics



M 62.4 57.7

SD 11.3 12.4

Male 19 63 8 31

Female 11 37 18 69


Single 3 10 4 15

Married 19 63 15 58

Defacto/living together 5 17 5 19

Separated/divorced 1 3

Widowed 2 7 28

Place of birth

Australia 20 67 19 73

Not Australiaa 10 33 7 27

Time in Australia, if not born in Australia

Mdn 36.5 39.0

IQR [22.3, 46.3] [14.0, 50.0]

Preferred language

English 29 97 26 100

Other 1 3

Highest levelof education

Less than high school 5 17 9 35

High school graduate 6 20 8 31

TAFE/University degree 13 43 6 23

Post-graduate degree 6 20 3 12


Physical wellbeing 17.8 (5.5)

Social wellbeing 21.0 (4.3)

Emotional wellbeing 16.6 (4.9)

Functional wellbeing 16.0 (5.1)

Total score 71.3 (15.4)

Relationship to patient

Spouse/partner 20 77

Parent 28

Child 3 12

Other 14

Length of relationship (in years)



Table 1 Participant characteristics (Continued)

Have you had ACP discussion with this patient?

Yes 10

aNot Australia includes England (2 patients, 3 carers), Greece (1 patient), Hong

Kong (1 patient, 1 carer), Ireland (1 patient), Italy (1 patient), Malta (1 patient, 1

carer), New Zealand (2 patients, 1 carer), Scotland (1 patient) and Sweden (1 carer).

bEstimates for FACT-G are means (and standard deviations).

Caregivers' responses to question 2 indicated a large-sized improvement of 1.9 points (95% CI: 0.8, 2.9; ES = 0.83) by

4 weeks post-intervention in satisfaction associated with opportunities to consider possible future health care needs and wishes with health care professionals. A medium-sized improvement of 1.6 points (95% CI: 0.2, 3.0; ES = 0.56) was also observed on question 6, indicating greater confidence in discussion of possible health care needs and wishes with health professionals.

Integration of ACP into EMR

Thirty patients were offered ACP documents to complete, 28 accepted them. Participants were invited to return previously or recently completed documents for scanning into the EMR. Eleven documents from 9 patients were returned which included 6 statements of choices and 5 EPOAMT.

Participation in follow up interview 1 week post-intervention

Most patients (23/30) and caregivers (25/26) participated in the 1 week post-intervention semi-structured interview. Non-participation reasons were: unable to contact (2 patients; 1 caregiver); too unwell (5 patients). Mean patient interview time was 22 (SD 9) minutes and mean caregiver interview time was 21 (SD 9) minutes.

Three themes addressing feasibility and acceptability were identified:

An ACP intervention may motivate participants to consider, actualise, or alter existing ACP's

The ACP intervention initiated or extended many patients' thoughts and discussions about their future health care desires should they lose their ability to state their views in the future. These discussions could be conducted with caregivers, other family members, and health professionals. Some caregivers especially welcomed becoming more aware of patients' EOL care desires. One recently married 42-year-old caregiver was shocked to hear her husband's preference to die in hospital because the patient remained distressed by memories of caring for his first wife who died from cancer and he did not want her "completely drained" by care-giving. Following the intervention she told him, "'I

Table 2 Modified Lyons ACP survey responses

Item n %

Have you ever written down any thoughts about your future health plans?

Yes, definitely 1 3.3

Very probably 1 3.3

Probably 1 3.3

Probably not 6 20.0

Definite no 21 70.0

Don't know

Advance Care Plans allow people to make their health care choices known before becoming seriously ill.

Have heard about and completed 2 6.7

Have heard about but not completed 13 43.3

Have not heard about 13 43.3

Don't know 2 6.7

Have you ever heard about and completed a Medical Enduring Power of Attorney in which you name someone to make decisions about your health care in case you could not?

Have heard about and completed 8 26.7

Have heard about but not completed 14 46.7

Have not heard about 6 20.0

Don't know 2 6.7

Whether you have completed any Advance Care Planning or not, have you talked about your wishes for care at the end of life with anyone?

Spouse/partner 13 44.8

Parents 1 3.4

Siblings 9 31.0

Friends 2 6.9

Boyfriend/girlfriend 1 3.4

Primary physician 1 3.4

Clergy 1 3.4

Other 7 24.1

Have not talked with anyone 12 41.4

made a promise that I would look after you' ..., he did hug me and say, 'I know but I also know how awful it can be', ... it's unfinished business."

Patients' and caregivers' can find the acceptable intervention reassuring, supportive, confronting or disempowering

Many participants said that the intervention helped them to feel respected, heard, valued, empowered, and relieved. A 69-year-old husband caregiver said that ACP, "lifts a huge burden from a caregiver". Important information sharing could also result. A 38-year-old daughter added that her father had only shown "bravado" since his illness whereas after the "really helpful" intervention,

"He finally talked about, you know, being worried about leaving his kids,. not being around to see his grandchildren, ... prognosis."

Some found the intervention both informative and distressing. One couple first considered that the patient may not recover during the intervention. A 64-year-old patient said, "It puts you on a dead end, . it was confronting but on the other hand, just, you have to make a decision."

Occasional participants feared ACP implied that patients were close to death. A 65-year-old patient "physically had to be sick" after the intervention, adding, "It really knocked me to think that I'm being put in that pigeon hole. I mean I want to live .... It's bad enough me having to retire." However, this patient thought that ACP should be an available option, as did all study participants.

Patients and caregivers usually welcomed partaking in the intervention together, with many patients stating that they would not complete it alone. It occasionally, however, exposed family tension. One 68-year-old care-giver felt that her attitudes remained disrespected following the intervention, adding that conversations with her husband are, "always punctuated with what he wants". Another 52-year-old male patient reflected on challenges of potential caregiver role reversal with his mother. Although he thought she, "would have a pretty good idea of what I would want anyway without it being put down" his mother expressed concern that he, "doesn't talk to me" and that his ACP related affairs were "left in limbo".

ACP components may not be furthered post interventions

The reasons for why the majority of patients did not complete any written components of ACPs following the intervention were variable. These included patients and caregivers: not feeling ready or interested in ACP; considering their exiting plans as sufficient; and believing that "you can't plan ahead". Many had busy lives which involved dealing with the patients' illnesses and some found the intervention inadequate. Two participants who were also physicians wanted to convey more specific medical details about their care and considered the documents as inadequate for these purposes. A 32-year-old male said, "It was more of an introduction .... I probably wasn't too sure about how to proceed further."


The challenge of conducting research in patients with advanced illness is well established [48]. Our results however established the feasibility of an ACP intervention specifically developed for cancer patients with stage III/IV disease, demonstrating a high compliance

Table 3 Descriptives for study measures completed by patients at pre-baseline, baseline and follow-ups


Pre-baseline Baseline

1 week


4 weeks


Study measure

n M SD n M SD n M SD n M SD

VisualAnalogue Scale (0=worst imaginable to 100=best imaginable 29 60.6 19.1

health state)

Pre-post ACP Intervention Questionnaire

1. I rate my current understanding of ACP as (0=poorest to 10=best 30 6.5 2.4

possible understanding)

2. The opportunity to consider my possible future health care needs and 27 6.8 2.2 wishes with health care professionals have been as (0=unsatisfying to 10=satisfying as possible)

3. Thinking about my possible future health care needs and wishes if I 30 3.4 2.2 became unwellcauses me (0=lowest to 10=highest distress


4. Discussing my possible future care health needs and wishes with 30 3.6 2.6 others would cause me the (0=lowest to 10=highest distress


5. Making and informing others about decisions related to my possible 30 7.8 1.8 future health care needs and wishes is (0=not important at allto

10=extremely important)

6. My confidence in discussion of my possible future health care needs 30 7.7 2.2 and wishes with health professionals is (0=lowest to 10=highest


7. My confidence in discussion of my possible future health care needs 30 8.0 2.2 and wishes with family members/friends is (0=lowest to 10=highest


8. Considering my advanced care plan is (0=not helpfulat allto 30 7.8 2.0 10=extremely helpful)

9. Considering advance care planning when living with a cancer 30 8.0 1.9 diagnosis is (0=not important at allto 10=always important)

Decision Conflict Scale

Totalscore (0=no to 100=extremely high decisionalconflict)

Uncertainty subscore (0=extremely certain to 100=extremely uncertain about best choice)

Informed subscore (0=feels extremely informed to 100=feels extremely uninformed)

Values clarity subscore (0=feels extremely clear to 100=feels extremely unclear about personalvalues for benefits & risks/side effects)

Support subscore (0=feels extremely support to 100=feels extremely unsupported in decision making)

Effective decision subscore (0=good decision to 100=bad decision)

30 23.9 16.5 22 30 28.9 23.6 23

22.0 27.2

30 22.2 17.4 22 24.2

30 29.4 19.4 22 27.7

30 20.3 16.2 22 14.4

30 20.0 17.4 23

15.3 21.6

26 69.9 20.0

26 7.6 1.8

25 8.0 1.5

26 4.6 2.7

26 3.8 2.5

26 8.4 1.9

26 8.4 1.3

26 8.4 1.7

26 8.0 2.7

26 8.6 2.3

26 19.7 15.9

26 22.4 21.4

26 19.9 16.8

26 22.1 16.7

26 15.7 15.5

26 18.5 17.9

with the intervention, assessments and questionnaires. The QPCCS [39], however, was often unanswerable because many patients had not engaged in EOL discussions with physicians. Following the intervention, participants chose the extent to which they considered, discussed, or wrote down future plans, if at all. Only 9 patients submitted ACP documents for integration into EMR during the 4 week data collection phase, reinforcing that cancer patients often need time to approach ACP and may not be suited to interventions expecting

document completion, especially if required within a short time-frame. While some emphasized their disinterest in ACP, all believed that the intervention should be available. The intervention occasionally elicited preexisting tension between patient/caregiver, however, there was no causal evidence. Although participants' regular, positive accounts of the intervention's effect affirmed its broad acceptability, caution is needed because one participant became distressed and over half declined study involvement.

Table 4 Estimates of change and effect size for study measures completed patients (EQ-5D-3L, DCS and PPAIQ) and carers (PPAIQ)

EQ-5D-3L (patients only) M chg T1 to T4 (95% CI) ES

VisualAnalogue Scale 6.1 (-.1, 12.3) 0.36

Decision Conflict Scale (patients only) M chg T2 to T3 (95% CI) ES M chg T2 to T4 (95% CI) ES

Total score -1.2 (-7.1,4.8) 0.07 -4.7 (-11.6, 2.2) 0.29

Uncertainty subscore -2.5 (-11.7, 6.6) 0.11 -7.1 (-16.3,2.2) 0.31

Informed subscore 3.4 (-4.4, 11.3) 0.2 -2.5 (-11.1,6.1) 0.15

Values clarity subscore -1.0 (-11.6, 9.6) 0.05 -7.4 (-16.8, 1.9) 0.39

Support subscore -5.2 (-10.4,0.03) 0.33 -5.1 (-11.3, 1.0) 0.32

Effective decision subscore -1.2 (-6.2, 3.8) 0.07 -1.9 (-8.8, 4.9) 0.11

Patients Carers

Pre-post ACP Intervention Questionnaire (patients and carers) M chg T1 to T4 (95% CI) ES M chg T1 to T4 (95% CI) ES

1. I rate my current understanding of ACP as ... 1.2 (-0.02, 2.3) 0.50 1.0 (0.1, 1.9) 0.40

2. The opportunity to consider my possible future health care needs and wishes with health care professionals have been as ... 1.1 (-0.01,2.2) 0.58 1.9 (0.8, 2.9) 0.83

3. Thinking about my possible future health care needs and wishes if I became unwell causes me . 1.1 (0.2, 2.0) 0.50 .5 (-0.7, 1.7) 0.19

4. Discussing my possible future care health needs and wishes with others would cause me the ... 0.3 (-0.4, 1.1) 0.14 .5 (-0.8, 1.9) 0.21

5. Making and informing others about decisions related to my possible future health care needs and wishes is ... 0.6 (-0.3, 1.4) 0.30 .2 (-0.3, 0.6) 0.19

6. My confidence in discussion of my possible future health care needs and wishes with health professionals is ... 0.4 (-0.3, 1.2) 0.21 1.6 (0.2, 3.0) 0.56

7. My confidence in discussion of my possible future health care needs and wishes with family members/friends is ... 0.4 (-0.1, 0.9) 0.19 0.5 (-0.3, 1.4) 0.33

8. Considering my advanced care plan is ... 0.2 (-0.9, 1.2) 0.08 -0.08 (-0.6, 0.5) 0.06

9. Considering advance care planning when living with a cancer diagnosis is . 0.5 (-0.04, 1.0) 0.25 1.0 (0.1, 1.9) 0.40

M chg: mean change, T1: pre-baseline, T2: baseline, T3: 1 week post-intervention, T4: 4 weeks post-intervention, ES: effect size.

The modified Lyons [46] survey findings demonstrate poor pre-existing knowledge and actualisation of ACP. This was not unexpected given that the authors initiated this research programme to complement ongoing statewide and national initiatives to promote ACP [10,49]. In keeping with prior studies [24,50], small-sized changes, reflecting improvement, were observed in decisional conflict, with improved clarity, perceived support in decision-making, and certainty about a better choice being made observed. Nonetheless, confidence intervals for estimates of change were wide and all included zero.

Small to medium-sized changes were also observed in: patients' understanding and satisfaction with opportunities to consider future health care needs; and caregivers' confidence in discussions with health professionals. Again, confidence intervals were wide and most included zero. A large-sized change was observed in caregivers' satisfaction with opportunities to consider patients' future health care needs. Patients' distress associated with thinking about ACPs four weeks post intervention

reinforces that ACP can remain difficult for cancer patients even when its benefits are acknowledged [16].

Updated guidance for the evaluation of complex interventions [30] such as ACP promotes theoretical development and early phase piloting as we have done. We used a combination of methods: the vignette technique, a guided intervention by a skilled facilitator and a mixed methods research approach to allow for an integration of process and outcome evaluation [51]. In view of the ethical implications of including a control group in ACP intervention research with patients with advanced illnesses [52], future phase 3 studies require consideration beyond that of a standard randomized design to possibly include a stepped wedge design, high quality quasi experimental or observational study designs. Furthermore, given that phase 1 findings illustrated how ACP needs to be offered in a flexible, individualized and patient- and family-centered manner in oncology [6,16], fidelity of related interventions need to accommodate unsystematic variations in intervention delivery. For example, this

may involve the incorporation of the 'Technology Model, which includes monitoring of the intervention, accompanying procedures manual development, training and monitoring of interventionist as well as ongoing recording of variations in intervention delivery [53].

Several issues were identified that will require revision for a larger study. We only achieved a 47% consent rate, which was significantly lower than another ACP study which examined the impact of ACP amongst elderly Australians with nonmalignant conditions [29] and oncology studies in which oncologists recruited participants [21,28], while compatible with other oncology studies with researcher or nurse recruitment [5,6,16,54]. Recruitment by medical practitioners may increase consent rates though potential participants may feel less coerced when invited by non-clinical researchers or nurses. Follow up intervals warrant reconsideration as eight cancer patients were too sick to complete follow up due to the demanding schedule of treatment and declining illness trajectory. Cancer patients with stage III disease should be invited to participate in future studies with opportunities to revisit ACP decisions.

There are numerous study limitations. The study is highly vulnerable to selection bias as it was conducted in a single quaternary cancer centre which treats a cohort of treatment avid cancer patients, many of which are on early phase clinical trials. A small budget limited the intervention to a single point of contact, contrary to recommendations that suggest that uptake is increased when patients have multiple interactions with staff providing information [22]. We also did not elicit reasons for the low number of ACP documents submitted for inclusion to the EMR. However, as described in previous studies, some may have chosen to reject or relinquish ACP; may have required more time to consider ACP and may prefer informal conversations over completion of formal documentation [6,16,22]. Finally, the facilitator was an experienced and confident member of the nursing team which may have positively influenced the intervention's acceptability. A 58-year-old male patient stated, "Researcher was great to talk with, easy to talk with, she let you sit back and have your say," and a 60-year-old female caregiver said, "She explained it really, really well, and she put me at ease, and I felt very happy to be involved in the program".


An ACP intervention for advanced cancer patients and their caregivers was developed from phase 1 data and delivered by an experienced nurse. Feasibility of recruitment and acceptability of the intervention and most outcome measures were demonstrated. Modification of the intervention, incorporation of the Technology Model and further resourcing will be required for a larger

study. Although the intervention elicited many helpful EOL conversations, our studies have demonstrated that repeated invitations for participation in ACP may elicit distress in some patients and many patients continue to be reticent about completing formal ACP documentation [6,16]. We continue to advocate for the ethical principal of "respect for persons" [55] over patient autonomy in view of the distinct variability in patients' wishes to be involved in end-of-life discussions and decision making. The results from this study support the notion that ACP should be offered to all patients with advanced cancer and tailored to their individual preferences, rather than rigidly enforced.

Additional file

Additional file 1: ACP intervention.


ACP: Advanced care planning; DCS: DecisionalConflict Scale; EMR: Electronic medicalrecords; EPOAMT: Enduring Power of Attorney (MedicalTreatment); EOL: End of life; EQ-5D-3 L: Euroqual-5D; ES: Effect size; PPAIQ: Pre-post ACP Intervention Questionnaire; QPCCS: Quality of Patient-Clinician Communication Scale.

Competing interests

The authors declare no conflict of interest. NM and COC have fullcontrolof the data and willallow review of data if requested.

Authors' contributions

NM conceived of the study, managed the research, was a qualitative data inter-rater and the lead author of the manuscript. CO provided input into study design, conducted qualitative research interviews, led qualitative data analysis, and helped to draft the manuscript. AB provided input into study design, conducted the research intervention, performed data entry, and helped to draft the manuscript. KG provided input into study design, conducted statisticalanalysis, and helped to draft the manuscript. MK provided input into study design and helped to draft the manuscript. NH performed data entry and prepared the manuscript for publication. JC provided input into study design and helped to draft the manuscript. Allauthors read and approved the finalmanuscript.


The authors thank clinicians and staff from the participating tumour streams for their assistance and support. We thank allpatients and caregivers who generously participated in this research.


This study was funded by a grant awarded by the Peter MacCallum Cancer Foundation.

Author details

1 Palliative Care Service, Cabrini Health, 646 High Street, Prahran, Victoria 3181, Australia. 2Faculty of Medicine, Nursing and Health Sciences, Monash University, Victoria 3800, Australia. 3Caritas Christi Hospice, St Vincent's Hospital, 104 Studley Park Rd Kew, Victoria 3101, Australia. 4Department of Medicine, St Vincent's Hospital, Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia. 5Peter MacCallum Cancer Centre, St Andrews Place, East Melbourne, VIC 3002, Australia. 6Department of Nursing, University of Melbourne, Carlton, VIC 3053, Australia. 7HammondCare Palliative and Supportive Care Service, Greenwich Hospital, 97-115 River Road, Greenwich, NSW 2065, Australia. 8Sydney Medical School, University of Sydney, New South Wales 2006, Australia.

Received: 29 October 2014 Accepted: 23 April 2015 Published online: 16 May 2015


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