This cross-sectional survey study assesses the self-reported prognostic expectations of patients undergoing dialysis and how these expectations relate to care planning, goals, and preferences.
Key Points
Question
What are the prognostic expectations of people undergoing dialysis, and how do these relate to their treatment goals and preferences?
Findings
In this cross-sectional survey study of 996 patients receiving maintenance dialysis at nonprofit facilities in 2 US metropolitan areas, most of the respondents were either uncertain about prognosis or had a prognostic expectation of more than 10 years. In adjusted analyses, these groups were less likely than those with a prognostic expectation of fewer than 5 years to report having documented their treatment preferences and to value comfort over life extension, and more likely to want cardiopulmonary resuscitation and mechanical ventilation.
Meaning
Prognostic uncertainty and overly optimistic prognostic expectations among people undergoing dialysis may limit the benefit of advance care planning and contribute to intensive patterns of end-of-life care.
Abstract
Importance
Prognostic understanding can shape patients’ treatment goals and preferences. Patients undergoing dialysis in the United States have limited life expectancy and may receive end-of-life care directed at life extension. Little is known about their prognostic expectations.
Objective
To understand the prognostic expectations of patients undergoing dialysis and how these relate to care planning, goals, and preferences.
Design, Setting, and Participants
Cross-sectional survey study of 996 eligible patients treated with regular dialysis at 31 nonprofit dialysis facilities in 2 metropolitan areas (Seattle, Washington, and Nashville, Tennessee) between April 2015 and October 2018. After a pilot phase, 1434 eligible patients were invited to participate (response rate, 69.5%). To provide a context for interpreting survey participants’ prognostic estimates, United States Renal Data System standard analysis files were used to construct a comparison cohort of 307 602 patients undergoing in-center hemodialysis on January 1, 2006, and followed for death through July 31, 2017. Final analyses for this study were conducted between November 2018 and March 2019.
Exposures
Responses to the question “How long would you guess people your age with similar health conditions usually live?” (<5 years, 5-10 years, >10 years, or not sure).
Main Outcomes and Measures
Self-reported (1) documentation of a surrogate decision-maker, (2) documentation of treatment preferences, (3) values around life prolongation, (4) preferences for receipt of cardiopulmonary resuscitation and mechanical ventilation, and (5) desired place of death.
Results
Of the 996 survey respondents, the mean (SD) age was 62.7 (13.9) years, and 438 (44.0%) were women. Overall, 112 (11.2%) survey respondents selected a prognosis of fewer than 5 years, 150 (15.1%) respondents selected 5 to 10 years, 330 (33.1%) respondents selected more than 10 years, and 404 (40.6%) were not sure. By comparison, 185 427 (60.3%) prevalent US in-center patients undergoing hemodialysis died within 5 years, 58 437 (19.0%) died within 5 to 10 years, and 63 738 (20.7%) lived more than 10 years. In analyses adjusted for participant characteristics, survey respondents with a prognostic expectation of more than 10 years (vs <5 years) were less likely to report documentation of a surrogate decision-maker (adjusted odds ratio [aOR], 0.6; 95% CI, 0.4-0.9) and treatment preferences (aOR, 0.4; 95% CI, 0.2-0.6) and to value comfort over life extension (aOR, 0.1; 95% CI, 0.04-0.3), and were more likely to want cardiopulmonary resuscitation (aOR, 5.3; 95% CI, 3.2-8.7) and mechanical ventilation (aOR, 2.2; 95% CI, 1.2-3.7). The respondents who reported that they were not sure about prognosis had similar associations.
Conclusions and Relevance
Uncertain and overly optimistic prognostic expectations may limit the benefit of advance care planning and contribute to high-intensity end-of-life care in patients undergoing dialysis.
Introduction
Patients’ understanding of their prognosis and expected course of illness can profoundly shape their treatment goals and life choices.1 Such understanding is essential to the delivery of patient-centered care, shared decision-making, and advance care planning.2,3,4 Available evidence in people with cancer and older adults suggests that clinicians rarely share prognostic information5,6,7,8,9 and that patients often have overly optimistic expectations about the future.1,5,6,7,8,9
People with advanced kidney disease who undergo maintenance dialysis have limited life expectancy. Compared with other seriously ill populations, rates of advance care planning among members of this population are lower10,11 and patterns of end-of-life care are more focused on life prolongation.12,13,14,15,16 Although people with advanced kidney disease report wanting to learn about their prognosis and future course of illness,17,18,19,20,21 nephrologists rarely share prognostic information with their patients.22,23,24,25
Prior studies suggest that people with advanced kidney disease tend to have overly optimistic expectations about the future.21,24,26,27 However, these earlier studies were limited because they did not frame prognosis in terms of life expectancy, offer patients an opportunity to indicate if they were uncertain about their prognosis, or provide a detailed characterization of how prognostic expectations relate to other domains of end-of-life care.
In this study, we report on a survey that elicited the prognostic expectations of people undergoing dialysis framed in terms of life expectancy and examine how these expectations relate to engagement in advance care planning, treatment preferences, and values around life prolongation. To provide a context for interpreting the survey results, we compared participants’ prognostic expectations with actuarial survival in the US dialysis population.
Methods
Recruitment of Survey Participants
Study participants were identified from 31 nonprofit dialysis facilities in 2 US metropolitan areas (Seattle, Washington, and Nashville, Tennessee). Patients receiving dialysis in these facilities were eligible to participate in the study if they met the following criteria: (1) 21 years or older; (2) sufficiently fluent to communicate in English; and (3) cognitively able to provide informed consent. Study staff consulted with dialysis facility charge nurses to identify patients who met these eligibility criteria. Staff then recruited a pragmatic consecutive sample of eligible patients receiving dialysis at each facility at the time of survey administration. Enrolled patients completed a survey that included questions about prognostic expectations, readiness to engage in advance care planning, values around life prolongation, treatment preferences, and preferred place of death (Supplement).
Between April 2015 and October 2018, we approached 1595 patients to participate in the study (eFigure in the Supplement). During the first 8 months of recruitment, 161 eligible patients were invited to participate in the pilot phase of the study, and 146 patients completed pilot versions of the survey (90.6% response rate). Following the pilot phase, a further 1434 eligible patients were invited to participate, and 1009 patients completed the final version of the survey. We excluded 13 of these respondents because they did not record their name and/or date of birth on the paper survey or consent form (n = 9) or did not respond to the prognosis question (n = 4), yielding an analytic cohort of 996 patients (69.5% response rate). Of these, 991 (99.5%) were receiving in-center hemodialysis; the other 5 (0.5%) were receiving peritoneal dialysis. This study was approved by the institutional review board at the University of Washington in Seattle, and participants provided written informed consent.
Survey Design and Administration
The survey was designed by 5 of the authors (A.M.O., R.A.E., D.C.L., M.K.T., and E.K.V.). Survey items related to treatment preferences, values, and preferred place of death were taken or adapted from existing instruments.24,26,28,29 During the first 8 months of administration, the survey was iteratively refined to improve clarity and reduce length based on feedback from the first 146 patients enrolled in the study, staff members administering the survey, 2 patients with end-stage renal disease (ESRD) who were not enrolled in the study, the widow of a patient with ESRD, and a long-time patient advocate. During pilot testing, we asked patients to list any questions they found upsetting or difficult to understand and used this information to refine the survey. Participants could choose to have study coordinators record their survey responses during their dialysis session or they could complete the survey themselves and return it in person or by mail.
Primary Exposure
Responses to the following question served as the primary exposure: “How long would you guess people your age with similar health conditions usually live?” Possible answers included “less than 6 months,” “6 to 12 months,” “1 to 2 years,” “2 to 5 years,” “5 to 10 years,” “more than 10 years,” and “I’m not sure.” For responses that straddled categories, participants were instructed to select the higher category. Because few respondents expected to live fewer than 2 years (n = 41), response categories were analyzed as fewer than 5 years, 5 to 10 years, more than 10 years, or not sure.
Covariates
Self-reported participant characteristics included age, sex, race (white, black, Asian, American Indian or Alaskan Native, Native Hawaiian or other Pacific Islander, other, or missing), ethnicity (Hispanic or non-Hispanic), health status (excellent, very good, good, fair, or poor), time undergoing dialysis, and highest level of educational attainment (eighth grade or less; some high school; completed high school or equivalent; some college, community college, or trade school; graduated from college, community college, or trade school; or postgraduate training). We assessed self-reported spirituality based on responses to the following statement: “My religious or spiritual beliefs are really what lie behind my whole approach to life.” Possible answers included “definitely true,” “tends to be true,” “tends not to be true,” and “definitely not true.”
Outcomes
We examined the following outcomes: (1) self-reported documentation of a surrogate decision-maker (“I have signed official papers” vs “I have not thought about this,” “I have thought about this but not decided who,” “I know who this would be but have not asked him/her,” or “I have asked someone but have not signed official papers”), (2) self-reported documentation of treatment preferences (“I have signed official papers” vs “I have not thought about this,” “I have thought about this but have not talked to anyone about it,” “I have talked about this with a friend or family member but have not signed official papers,” or “I have talked about this with a doctor or other health care provider but have not signed official papers”), (3) values around life prolongation (participants were asked about their preferred plan of care if they were to become “very sick in the future” with possible responses including “extending life, even if that means having more pain and discomfort,” “relieving pain and discomfort as much as possible, even if that means not living as long,” or “I’m not sure which I would choose”), (4) preferences for receipt of cardiopulmonary resuscitation (CPR) and mechanical ventilation (participants were asked if they would want these interventions if they “had to decide right now” with possible responses including “definitely yes,” vs “probably yes,” “probably not,” or “definitely not,”), and (5) desired place of death (home or home of a relative or friend vs hospital, nursing home, or other).
Survival Among Prevalent US Patients Undergoing Dialysis
To provide a context for interpreting survey participants’ prognostic estimates, we used United States Renal Data System (USRDS) standard analysis files to construct a comparison cohort of 307 602 patients 21 years or older who were receiving in-center hemodialysis on January 1, 2006 (to allow for at least 10 years of follow-up). Among members of this cohort, we described actuarial survival through July 31, 2017; we also examined survival among the subset of cohort members who received a transplant during follow-up. Treatment modality was ascertained from the USRDS Treatment History File, and age, sex, race, ethnicity, time since onset of ESRD, date of first transplant, and date of death were ascertained from the USRDS Patients File.
Statistical Analyses
The characteristics of survey participants were described both for the overall cohort and after stratification by patients’ prognostic expectations (<5 years, 5-10 years, >10 years, and not sure). We used multinomial regression to examine the associations between prognostic expectations and the following self-reported participant characteristics: age, sex, race, ethnicity, health status, time since ESRD onset, highest educational level, and spirituality. We used logistic and multinomial regression adjusted for these same self-reported characteristics to measure the associations of prognostic expectations with study outcomes. All analyses were conducted using Stata, version 13.1 (StataCorp).
Results
Characteristics and Prognostic Expectations of Survey Respondents
Survey respondents had a mean (SD) age of 62.7 (13.9) years, 438 (44.0%) were women, 565 (56.7%) were white, 268 (26.9%) were black, and 64 (6.4%) were Hispanic (Table 1). At the time of survey completion, most participants reported being in excellent, very good, or good health (n = 576; 57.8%), had been treated with dialysis for fewer than 5 years (n = 757; 76.0%), and had some college or postgraduate education (n = 531; 53.3%). The majority (n = 708; 71.1%) indicated that the statement “my religious or spiritual beliefs are really what lie behind my whole approach to life” was “definitely true” or “tends to be true.”
Table 1. Characteristics of USTATE Participants Stratified by Prognostic Expectationsa.
| Characteristics | Cohort Patients (n = 996), No. (%) | Prognostic Expectations, No. (%) | P Valueb | |||
|---|---|---|---|---|---|---|
| <5 y (n = 112) | 5-10 y (n = 150) | >10 y (n = 330) | Uncertain (n = 404) | |||
| Age group, y | <.001 | |||||
| <45 | 113 (11.4) | 1 (0.9) | 11 (7.3) | 63 (19.1) | 38 (9.4) | |
| 45-59 | 289 (29.0) | 24 (21.4) | 29 (19.3) | 115 (34.9) | 121 (30.0) | |
| 60-74 | 408 (41.0) | 51 (45.5) | 74 (49.3) | 127 (38.5) | 156 (38.6) | |
| ≥75 | 186 (18.7) | 36 (32.1) | 36 (24.0) | 25 (7.6) | 89 (22.0) | |
| Female sex | 438 (44.0) | 46 (41.1) | 73 (48.7) | 121 (36.7) | 198 (49.0) | .005 |
| Race | .02 | |||||
| White | 565 (56.7) | 83 (74.1) | 97 (64.7) | 181 (54.9) | 204 (50.5) | |
| Black | 268 (26.9) | 15 (13.4) | 36 (24.0) | 95 (28.8) | 122 (30.2) | |
| Asian | 83 (8.3) | 8 (7.1) | 8 (5.3) | 26 (7.9) | 41 (10.2) | |
| American Indian or Alaskan Native | 16 (1.6) | 2 (1.8) | 1 (0.7) | 7 (2.1) | 6 (1.5) | |
| Native Hawaiian or other Pacific Islander | 31 (3.1) | 2 (1.8) | 4 (2.7) | 9 (2.7) | 16 (4.0) | |
| Other or missing | 33 (3.3) | 2 (1.8) | 4 (2.7) | 12 (3.6) | 15 (3.7) | |
| Ethnicity | .07 | |||||
| Hispanic | 64 (6.4) | 5 (4.5) | 6 (4.0) | 28 (8.5) | 25 (6.2) | |
| Missing | 15 (1.5) | 0 | 1 (0.7) | 3 (0.9) | 11 (2.7) | |
| Self-reported health status | <.001 | |||||
| Excellent | 33 (3.3) | 4 (3.6) | 3 (2.0) | 10 (3.0) | 16 (4.0) | |
| Very good | 163 (16.4) | 9 (8.0) | 24 (16.0) | 72 (21.8) | 58 (14.4) | |
| Good | 380 (38.2) | 28 (25.0) | 54 (36.0) | 147 (44.6) | 151 (37.4) | |
| Fair | 310 (31.1) | 43 (38.4) | 49 (32.7) | 78 (23.6) | 140 (34.7) | |
| Poor | 108 (10.8) | 28 (25.0) | 20 (13.3) | 23 (7.0) | 37 (9.2) | |
| Missing | 2 (0.2) | 0 | 0 | 0 | 2 (0.5) | |
| Time undergoing dialysis | .95 | |||||
| <6 mo | 133 (13.4) | 14 (12.5) | 23 (15.3) | 45 (13.6) | 51 (12.6) | |
| 6-12 mo | 145 (14.6) | 17 (15.2) | 26 (17.3) | 41 (12.4) | 61 (15.1) | |
| 1-2 y | 216 (21.7) | 27 (24.1) | 35 (23.3) | 74 (22.4) | 80 (19.8) | |
| 2-5 y | 263 (26.4) | 28 (25.0) | 36 (24.0) | 89 (27.0) | 110 (27.2) | |
| 5-10 y | 168 (16.9) | 19 (17.0) | 22 (14.7) | 53 (16.1) | 74 (18.3) | |
| >10 y | 68 (6.8) | 7 (6.3) | 7 (4.7) | 27 (8.2) | 27 (6.7) | |
| Missing | 3 (0.3) | 0 | 1 (0.7) | 1 (0.3) | 1 (0.3) | |
| Highest educational level | .001 | |||||
| ≤8th grade | 31 (3.1) | 1 (0.9) | 3 (2.0) | 4 (1.2) | 23 (5.7) | |
| Some high school | 96 (9.6) | 9 (8.0) | 9 (6.0) | 26 (7.9) | 52 (12.9) | |
| Graduated high school/GED | 331 (33.2) | 38 (33.9) | 45 (30.0) | 98 (29.7) | 150 (37.1) | |
| Some college | 169 (17.0) | 15 (13.4) | 22 (14.7) | 69 (20.9) | 63 (15.6) | |
| Graduated from college | 307 (30.8) | 37 (33.0) | 56 (37.3) | 113 (34.2) | 101 (25.0) | |
| Postgraduate education | 55 (5.5) | 11 (9.8) | 14 (9.3) | 18 (5.5) | 12 (3.0) | |
| Missing or other | 7 (0.7) | 1 (0.9) | 1 (0.7) | 2 (0.6) | 3 (0.8) | |
| Religious and spiritual beliefs important | .27 | |||||
| Definitely true | 466 (46.8) | 38 (33.9) | 77 (51.3) | 162 (49.1) | 189 (46.8) | |
| Tends to be true | 242 (24.3) | 33 (29.5) | 32 (21.3) | 78 (24.6) | 99 (24.5) | |
| Tends not to be true | 140 (14.1) | 21 (18.8) | 25 (16.7) | 40 (12.1) | 54 (13.4) | |
| Definitely not true | 138 (13.9) | 19 (17.0) | 15 (10.0) | 48 (14.6) | 56 (13.9) | |
| Missing | 10 (1.0) | 1 (0.9) | 1 (0.7) | 2 (0.6) | 6 (1.5) | |
Abbreviations: GED, General Educational Development test; USTATE, United States Renal Data System Study of Treatment Preferences.
Columns may not sum to 100% owing to rounding.
P values calculated using a χ2 test.
When participants were asked to guess how long they thought people of their age with similar health conditions usually live, 112 (11.2%) responded fewer than 5 years, 150 (15.1%) responded 5 to 10 years, 330 (33.1%) responded more than 10 years, and 404 (40.6%) were not sure (Figure 1). Even among the 62 participants 75 years or older with fair or poor self-reported health, 16 (25.8%) responded fewer than 5 years, 13 (21.0%) responded 5 to 10 years, 3 (4.8%) responded more than 10 years, and 30 (48.4%) were not sure.
Figure 1. Prognostic Expectations of Survey Participants Overall and Stratified by Age and Self-reported Health Status.
Characteristics and Survival of Prevalent US Patients Undergoing In-Center Hemodialysis
The mean (SD) age of prevalent in-center US patients undergoing hemodialysis (n = 307 602) on January 1, 2006, was 62.0 (15.0) years, 45.3% were women, 55.1% were white, 38.0% were black, and 15.7% were Hispanic (eTable 1 in the Supplement). A majority (60.3%) of these patients died within 5 years of the index date, 19.0% died within 5 to 10 years, and 20.7% lived more than 10 years (Figure 2).
Figure 2. Prognostic Expectations of Survey Participants and Actuarial Survival Among Prevalent US In-Center Patients Undergoing Hemodialysis.
To facilitate comparisons across groups, survey participants who were not sure of their prognosis are excluded.
A subset of 33 713 (11.0%) patients in the cohort went on to receive a kidney transplant during follow-up. The mean (SD) age of these patients on January 1, 2006, was 49.5 (12.6) years, 36.7% were women, 51.7% were white, 39.7% were black, and 21.0% were Hispanic (eTable 1 in the Supplement). Of these patients, 9.1% died within 5 years, 17.6% died within 5 to 10 years, and 73.3% lived more than 10 years (Figure 2).
Advance Care Planning, Treatment Preferences, Values, and Preferred Place of Death
Overall, 483 (48.5%) survey participants reported having documented a surrogate decision-maker, and 376 (37.8%) reported having documented their treatment preferences (Table 2). Most participants reported that they would “definitely” or “probably” want CPR (n = 837; 84.0%) and mechanical ventilation (n = 631; 63.3%). Almost half (n = 481; 48.3%) said that they would prioritize relieving pain and discomfort over extending life, and almost one-third (n = 319; 32.0%) were uncertain. A majority (n = 574; 57.6%) preferred to die at home or at the home of a relative or friend.
Table 2. Engagement in Advance Care Planning, Values, Treatment Preferences, and Preferred Place of Death Among USTATE Participants With Differing Prognostic Expectationsa.
| Questions and Responses | Cohort Patients (n = 996), No. (%) | Prognostic Expectations, No. (%) | P Valueb | |||
|---|---|---|---|---|---|---|
| <5 y (n = 112) | 5-10 y (n = 150) | >10 y (n = 330) | Uncertain (n = 404) | |||
| Do you have a person who could make medical decisions for you if you were to become very sick and were unable to speak for yourself? | ||||||
| I have not thought about this | 57 (5.7) | 7 (6.3) | 5 (3.3) | 21 (6.4) | 24 (5.9) | .002 |
| I have thought about this but have not decided who | 60 (6.0) | 4 (3.6) | 8 (5.3) | 25 (7.6) | 23 (5.7) | |
| I know who this would be but have not asked him/her | 76 (7.6) | 4 (3.6) | 5 (3.3) | 34 (10.3) | 33 (8.2) | |
| I have asked someone but have not signed official papers | 304 (30.5) | 27 (24.1) | 41 (27.3) | 114 (34.6) | 122 (30.2) | |
| I have signed official papers | 483 (48.5) | 70 (62.5) | 91 (60.7) | 130 (39.4) | 192 (47.5) | |
| Missing | 16 (1.6) | 0 | 0 | 6 (1.8) | 10 (2.5) | |
| Have you thought about the kinds of treatments that you would want or not want if you were to become very sick and were unable to speak for yourself? | ||||||
| I have not thought about this | 220 (22.1) | 11 (9.8) | 23 (15.3) | 74 (22.4) | 112 (27.7) | <.001 |
| I have thought about this but have not talked to anyone about it | 129 (13.0) | 10 (8.9) | 15 (10.0) | 53 (16.1) | 51 (12.6) | .03 |
| I have talked about this with a friend or family member but have not signed official papers | 252 (25.3) | 21 (18.8) | 33 (22.0) | 103 (31.2) | 95 (23.5) | .01 |
| I have talked about this with a doctor or other health care provider but have not signed official papers | 81 (8.1) | 8 (7.1) | 11 (7.3) | 29 (8.8) | 33 (8.2) | .16 |
| I have signed official papers | 376 (37.8) | 67 (59.8) | 75 (50.0) | 97 (29.4) | 137 (33.9) | <.001 |
| Missing | 6 (0.6) | 0 | 0 | 0 | 6 (1.5) | .03 |
| If you had to decide right now, would you want CPR (cardiopulmonary resuscitation) if your heart were to stop beating? | ||||||
| Definitely yes | 644 (64.7) | 37 (33.0) | 93 (62.0) | 255 (77.3) | 259 (64.1) | <.001 |
| Probably yes | 193 (19.4) | 38 (33.9) | 33 (22.0) | 45 (13.6) | 77 (19.1) | |
| Probably not | 63 (6.3) | 18 (16.1) | 7 (4.7) | 15 (4.6) | 23 (5.7) | |
| Definitely not | 87 (8.7) | 18 (16.1) | 16 (10.7) | 14 (4.2) | 39 (9.7) | |
| Missing | 9 (0.9) | 1 (0.9) | 1 (0.7) | 1 (0.3) | 6 (1.5) | |
| If you had to decide right now, would you want to be placed on a breathing machine (ventilator or respirator) if you became so sick that you could not breathe on your own? | ||||||
| Definitely yes | 366 (36.8) | 21 (18.8) | 47 (31.3) | 135 (40.9) | 163 (40.4) | <.001 |
| Probably yes | 265 (26.6) | 29 (25.9) | 44 (29.3) | 94 (28.5) | 98 (24.3) | |
| Probably not | 168 (16.9) | 35 (31.3) | 20 (13.3) | 49 (14.9) | 64 (15.8) | |
| Definitely not | 185 (18.6) | 26 (23.2) | 36 (24.0) | 51 (15.5) | 72 (17.8) | |
| Missing | 12 (1.2) | 1 (0.9) | 3 (2.0) | 1 (0.3) | 7 (1.7) | |
| If you were to become very sick in the future and were unable to speak for yourself, would you prefer | ||||||
| Extending life, even if that means having more pain and discomfort | 190 (19.1) | 5 (4.5) | 17 (11.3) | 95 (28.8) | 73 (18.1) | <.001 |
| Relieving pain and discomfort as much as possible, even if that means not living as long | 481 (48.3) | 90 (80.4) | 96 (64.0) | 130 (39.4) | 165 (40.8) | |
| I’m not sure which I would choose | 319 (32.0) | 17 (15.2) | 37 (24.7) | 103 (31.2) | 162 (40.1) | |
| Missing | 6 (0.6) | 0 | 0 | 2 (0.6) | 4 (1.0) | |
| If you had to decide right now, where would you prefer to die if circumstances allowed you to choose? | ||||||
| In my own home | 522 (52.4) | 72 (64.3) | 78 (52.0) | 172 (52.1) | 200 (49.5) | .02 |
| In the home of a relative or friend | 52 (5.2) | 6 (5.4) | 10 (6.7) | 15 (4.6) | 21 (5.2) | |
| In a hospital | 252 (25.3) | 19 (17.0) | 43 (28.7) | 83 (25.2) | 107 (26.5) | |
| In a nursing home | 21 (2.1) | 6 (5.4) | 4 (2.7) | 2 (0.6) | 9 (2.2) | |
| Other | 130 (13.1) | 9 (8.0) | 14 (9.3) | 51 (15.5) | 56 (13.9) | |
| Missing | 19 (1.9) | 0 | 1 (0.7) | 7 (2.1) | 11 (2.7) | |
Abbreviation: USTATE, United States Renal Data System Study of Treatment Preferences.
Columns may not sum to 100% owing to rounding. Documentation of treatment preferences does not sum to 100% because participants could choose more than 1 option.
P values were calculated using a χ2 test (values for documentation of treatment preferences were calculated for each response because participants could choose more than 1 option).
Multivariate Analyses Among Survey Participants
In analyses adjusted for all self-reported participant characteristics, participants 75 years or older (adjusted odds ratio [aOR], 0.2; 95% CI, 0.1-0.3) and those with fair or poor self-reported health status (aOR, 0.2; 95% CI, 0.1-0.3) were less likely to have a prognostic expectation of more than 10 years (vs <5 years), whereas those who self-identified as black (aOR, 2.2; 95% CI, 1.1-4.1) and those who reported that their spiritual beliefs were definitely important (aOR, 1.7; 95% CI, 1.0-2.7) were more likely. Patients who self-identified as black (aOR, 2.6; 95% CI, 1.4-4.9) or other race (aOR, 2.0; 95% CI, 1.0-4.0) were more likely to be uncertain about prognosis (vs having a prognostic expectation <5 years), whereas those with a college or postgraduate education (aOR, 0.6; 95% CI, 0.4-1.0) and those with fair or poor self-reported health status (aOR, 0.4; 95% CI, 0.3-0.6) were less likely to be uncertain about their prognosis (eTable 2 in the Supplement).
After adjustment for all self-reported characteristics, participants with a prognostic expectation of more than 10 years (vs <5 years) were less likely to report documentation of a surrogate decision-maker (aOR, 0.6; 95% CI, 0.4-0.9) and treatment preferences (aOR, 0.4; 95% CI, 0.2-0.6) and to value comfort over life extension (aOR, 0.1; 95% CI, 0.04-0.3), and more likely to “definitely” want CPR (aOR, 5.3; 95% CI, 3.2-8.7) and mechanical ventilation (aOR, 2.2; 95% CI, 1.2-3.7) (Figure 3). Those who were uncertain about prognosis were less likely to have documented their treatment preferences (aOR, 0.4; 95% CI, 0.3-0.7) and to prefer a focus on comfort vs life prolongation (aOR, 0.2; 95% CI, 0.1-0.4), and were more likely to want CPR (aOR, 3.4; 95% CI, 2.1-5.4) and mechanical ventilation (aOR, 2.5; 95% CI, 1.5-4.2).
Figure 3. Adjusted Association of Prognostic Expectations With Engagement in Advance Care Planning, Values Around Life Prolongation, Treatment Preferences, and Preferred Place of Death.
For responses to the question on values, those valuing comfort and those who were uncertain were compared with the reference group of those valuing life prolongation. Analyses are adjusted for self-reported age, sex, race and ethnicity, health status, time undergoing dialysis, highest educational level, and spirituality. CPR indicates cardiopulmonary resuscitation.
Discussion
Consistent with the results of earlier studies of patients with advanced kidney disease,21,24,26,27 the prognostic expectations of participants in the present study were extremely optimistic. When asked to guess how long people of their age with similar health conditions usually live, 11.2% of survey participants responded fewer than 5 years, 15.1% responded 5 to 10 years, 33.1% responded more than 10 years, and 40.6% were not sure. These prognostic estimates contrast with the 60.3% 5-year mortality rate observed in the overall US in-center hemodialysis population.
Prognostic optimism and uncertainty in patients receiving dialysis likely reflect a number of different factors. Communication about prognosis is especially challenging for technologies such as dialysis, which promise to extend life and that shift the focus of care away from prognosis toward diagnosis and treatment.8,30,31,32,33,34 When dialysis is framed as a necessary lifesaving treatment rather than an explicit treatment choice, discussions about life expectancy, future course of illness, and treatment alternatives likely assume a lower priority.35,36,37,38 Although a number of tools have been developed to predict mortality in the dialysis population,39,40 estimating life expectancy in individual patients continues to be fraught with difficulty. Furthermore, payment and incentive structures for nephrologists and dialysis facilities have not traditionally encouraged—and may even discourage—frank discussions about prognosis.34 These conversations may be difficult, and nephrologists often do not feel equipped to have them.23
Little is known about the factors that shape the prognostic awareness of people undergoing dialysis. Prior work suggests that these patients’ prognostic expectations may be linked to expectations around kidney transplant.24 Although our survey did not include questions about transplant, it is striking that survey participants’ overall prognostic estimates most closely approximated actuarial survival for the small and relatively young segment of the US dialysis population that went on to receive a transplant, of whom more than 70% lived longer than 10 years. Spiritual and religious beliefs also seemed important in shaping prognostic expectations, which adds to previous work demonstrating the importance of spirituality in patients with advanced kidney disease.41,42,43 Collectively, these findings argue for more research to understand sources of prognostic knowledge among patients undergoing dialysis, more attention to communication around prognosis in nephrology training and continuing education programs, and stronger efforts to cultivate prognostic awareness and manage prognostic uncertainty among patients receiving dialysis.33,42,43,44,45,46,47
We found a strong association between expected prognosis and other domains of end-of-life care such that uncertainty about prognosis and more optimistic responses to the prognosis question were associated with decreased readiness to engage in advance care planning, as well as preferences for more aggressive treatment and prioritizing life extension over comfort. Collectively, these findings—which are consistent with prior work in patients undergoing dialysis, older adults, and people with cancer1,2,3,24—suggest that poor prognostic awareness and prognostic uncertainty may serve as barriers to shared decision-making and advance care planning, and perhaps contribute to intensive and costly patterns of end-of-life care in this population. The findings of this study also suggest that preparing patients undergoing dialysis for end-of-life decision-making might benefit from efforts to raise prognostic awareness and manage prognostic uncertainty.
Limitations
This study has limitations. First, our question about prognosis has not been validated. We chose not to use existing instruments that ask patients to estimate their probability of surviving for prespecified periods of time because we felt that asking people to estimate life expectancy would better elicit their thinking about prognosis. We also wanted participants to reflect on the likely prognosis for someone like them to minimize the psychological defenses that might contribute to overly optimistic estimates. Although it is reassuring that none of the study participants reported difficulty understanding the prognosis question during pilot testing, it is possible that they may have interpreted this question in different ways. Second, because of differences in time period and in measured (eg, race and ethnicity), and perhaps unmeasured (eg, comorbid conditions), patient characteristics, it is possible that mortality rates among survey participants might differ from those reported for the USRDS cohort. We consider this unlikely because the survey had very few eligibility criteria, the response rate was relatively high, and the demographic composition of survey participants was similar to that of the prevalent US in-center hemodialysis population. Third, because we did not ask patients whether they had discussed prognosis with a clinician, or about their expectations for kidney transplant, our results provide limited insight into reasons for the high frequency of optimistic and uncertain prognostic expectations reported here. Fourth, results may not be generalizable to groups that were not included in the survey (eg, non-English–speaking patients, those who cannot provide informed consent, those dialyzing at for-profit facilities, and those living in rural or other US metropolitan areas). The generalizability of study results to patients receiving home hemodialysis or peritoneal dialysis may also be limited because nearly all participants were receiving in-center hemodialysis. Finally, though prognostic estimates were associated with treatment preferences and values, this does not imply a causal relationship. Further studies are needed to determine whether interventions to raise prognostic awareness can shape treatment preferences, values, quality of life, and preparedness for end-of-life care in this population.
Conclusions
In summary, in our survey of patients receiving dialysis, most respondents were either uncertain about prognosis or had highly optimistic prognostic expectations when viewed in the context of actuarial survival in the US hemodialysis population. More optimistic and uncertain prognostic expectations among survey respondents were significantly associated with less engagement in advance care planning and preferences for life-extending treatment choices, which suggests that these expectations may limit the benefit of advance care planning and contribute to intensive and costly patterns of end-of-life care in this population. These findings highlight the need for a deeper understanding of what drives the prognostic expectations of patients undergoing dialysis and call for efforts to raise prognostic awareness and manage prognostic uncertainty among members of this population.
Supplemental Tables, Figure, and Survey.
eTable 1. Characteristics of prevalent in-center hemodialysis patients
eTable 2. Adjusted association of self-reported patient characteristics with prognostic expectations
eFigure. Cohort derivation
eAppendix. USRDS Study about Treatment Preferences (UState) Patient Questionnaire
References
- 1.Weeks JC, Cook EF, O’Day SJ, et al. Relationship between cancer patients’ predictions of prognosis and their treatment preferences. JAMA. 1998;279(21):1709-1714. doi: 10.1001/jama.279.21.1709 [DOI] [PubMed] [Google Scholar]
- 2.Prigerson HG. Socialization to dying: social determinants of death acknowledgement and treatment among terminally ill geriatric patients. J Health Soc Behav. 1992;33(4):378-395. doi: 10.2307/2137315 [DOI] [PubMed] [Google Scholar]
- 3.Wright AA, Zhang B, Ray A, et al. Associations between end-of-life discussions, patient mental health, medical care near death, and caregiver bereavement adjustment. JAMA. 2008;300(14):1665-1673. doi: 10.1001/jama.300.14.1665 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 4.Barry MJ, Edgman-Levitan S. Shared decision making—pinnacle of patient-centered care. N Engl J Med. 2012;366(9):780-781. doi: 10.1056/NEJMp1109283 [DOI] [PubMed] [Google Scholar]
- 5.Gill TM. The central role of prognosis in clinical decision making. JAMA. 2012;307(2):199-200. doi: 10.1001/jama.2011.1992 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 6.Croft P, Altman DG, Deeks JJ, et al. The science of clinical practice: disease diagnosis or patient prognosis? Evidence about “what is likely to happen” should shape clinical practice. BMC Med. 2015;13:20. doi: 10.1186/s12916-014-0265-4 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 7.American Geriatrics Society Expert Panel on the Care of Older Adults with Multimorbidity Guiding principles for the care of older adults with multimorbidity: an approach for clinicians: J Am Geriatr Soc. 2012;60(10):E1-E25. doi: 10.1111/j.1532-5415.2012.04188.x [DOI] [PMC free article] [PubMed] [Google Scholar]
- 8.Christakis NA. Death Foretold: Prophecy and Prognosis in Medical Care. Chicago, IL: University of Chicago; 1999. [Google Scholar]
- 9.Smith AK, Williams BA, Lo B. Discussing overall prognosis with the very elderly. N Engl J Med. 2011;365(23):2149-2151. doi: 10.1056/NEJMp1109990 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 10.Kurella Tamura M, Liu S, Montez-Rath ME, O’Hare AM, Hall YN, Lorenz KA. Persistent gaps in use of advance directives among nursing home residents receiving maintenance dialysis. JAMA Intern Med. 2017;177(8):1204-1205. doi: 10.1001/jamainternmed.2017.1618 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 11.Kurella Tamura M, Montez-Rath ME, Hall YN, Katz R, O’Hare AM. Advance directives and end-of-life care among nursing home residents receiving maintenance dialysis. Clin J Am Soc Nephrol. 2017;12(3):435-442. doi: 10.2215/CJN.07510716 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 12.Wachterman MW, Pilver C, Smith D, Ersek M, Lipsitz SR, Keating NL. Quality of end-of-life care provided to patients with different serious illnesses. JAMA Intern Med. 2016;176(8):1095-1102. doi: 10.1001/jamainternmed.2016.1200 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 13.Wong SP, Kreuter W, O’Hare AM. Treatment intensity at the end of life in older adults receiving long-term dialysis. Arch Intern Med. 2012;172(8):661-663. doi: 10.1001/archinternmed.2012.268 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 14.Saran R, Robinson B, Abbott KC, et al. US Renal Data System 2017 Annual Data Report: epidemiology of kidney disease in the United States. Am J Kidney Dis. 2018;71(3S1):A7. doi: 10.1053/j.ajkd.2018.01.002 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 15.O’Hare AM, Hailpern SM, Wachterman M, et al. Hospice use and end-of-life spending trajectories in Medicare beneficiaries on hemodialysis. Health Aff (Millwood). 2018;37(6):980-987. doi: 10.1377/hlthaff.2017.1181 [DOI] [PubMed] [Google Scholar]
- 16.Wachterman MW, Hailpern SM, Keating NL, Kurella Tamura M, O’Hare AM. Association between hospice length of stay, health care utilization, and Medicare costs at the end of life among patients who received maintenance hemodialysis. JAMA Intern Med. 2018;178(6):792-799. doi: 10.1001/jamainternmed.2018.0256 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 17.Davison SN, Simpson C. Hope and advance care planning in patients with end stage renal disease: qualitative interview study. BMJ. 2006;333(7574):886. doi: 10.1136/bmj.38965.626250.55 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 18.Fine A, Fontaine B, Kraushar MM, Plamondon J. Patients with chronic kidney disease stages 3 and 4 demand survival information on dialysis. Perit Dial Int. 2007;27(5):589-591. [PubMed] [Google Scholar]
- 19.Fine A, Fontaine B, Kraushar MM, Rich BR. Nephrologists should voluntarily divulge survival data to potential dialysis patients: a questionnaire study. Perit Dial Int. 2005;25(3):269-273. [PubMed] [Google Scholar]
- 20.Davison SN, Jhangri GS. Existential and supportive care needs among patients with chronic kidney disease. J Pain Symptom Manage. 2010;40(6):838-843. doi: 10.1016/j.jpainsymman.2010.03.015 [DOI] [PubMed] [Google Scholar]
- 21.Saeed F, Sardar MA, Davison SN, Murad H, Duberstein PR, Quill TE. Patients’ perspectives on dialysis decision-making and end-of-life care. Clin Nephrol. 2019;91(5):294-300. doi: 10.5414/CN109608 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 22.Combs SA, Culp S, Matlock DD, Kutner JS, Holley JL, Moss AH. Update on end-of-life care training during nephrology fellowship: a cross-sectional national survey of fellows. Am J Kidney Dis. 2015;65(2):233-239. doi: 10.1053/j.ajkd.2014.07.018 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 23.Davison SN, Jhangri GS, Holley JL, Moss AH. Nephrologists’ reported preparedness for end-of-life decision-making. Clin J Am Soc Nephrol. 2006;1(6):1256-1262. doi: 10.2215/CJN.02040606 [DOI] [PubMed] [Google Scholar]
- 24.Wachterman MW, Marcantonio ER, Davis RB, et al. Relationship between the prognostic expectations of seriously ill patients undergoing hemodialysis and their nephrologists. JAMA Intern Med. 2013;173(13):1206-1214. doi: 10.1001/jamainternmed.2013.6036 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 25.Schell JO, Patel UD, Steinhauser KE, Ammarell N, Tulsky JA. Discussions of the kidney disease trajectory by elderly patients and nephrologists: a qualitative study. Am J Kidney Dis. 2012;59(4):495-503. doi: 10.1053/j.ajkd.2011.11.023 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 26.Davison SN. End-of-life care preferences and needs: perceptions of patients with chronic kidney disease. Clin J Am Soc Nephrol. 2010;5(2):195-204. doi: 10.2215/CJN.05960809 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 27.Gilman EA, Feely MA, Hildebrandt D, et al. Do patients receiving hemodialysis regret starting dialysis? A survey of affected patients. Clin Nephrol. 2017;87(3):117-123. doi: 10.5414/CN109030 [DOI] [PubMed] [Google Scholar]
- 28.Curtis JR, Downey L, Back AL, et al. Effect of a patient and clinician communication-priming intervention on patient-reported goals-of-care discussions between patients with serious illness and clinicians: a randomized clinical trial. JAMA Intern Med. 2018;178(7):930-940. doi: 10.1001/jamainternmed.2018.2317 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 29.The SUPPORT Principal Investigators A controlled trial to improve care for seriously ill hospitalized patients: the study to understand prognoses and preferences for outcomes and risks of treatments (SUPPORT). JAMA. 1995;274(20):1591-1598. doi: 10.1001/jama.1995.03530200027032 [DOI] [PubMed] [Google Scholar]
- 30.Layne LL. “How’s the baby doing?” Struggling with narratives of progress in a neonatal intensive care unit. Med Anthropol Q. 1996;10(4):624-656. doi: 10.1525/maq.1996.10.4.02a00130 [DOI] [PubMed] [Google Scholar]
- 31.Maynard RJ. Controlling death—compromising life: chronic disease, prognostication, and the new biotechnologies. Med Anthropol Q. 2006;20(2):212-234. doi: 10.1525/maq.2006.20.2.212 [DOI] [PubMed] [Google Scholar]
- 32.Christakis NA. The ellipsis of prognosis in modern medical thought. Soc Sci Med. 1997;44(3):301-315. doi: 10.1016/S0277-9536(96)00100-1 [DOI] [PubMed] [Google Scholar]
- 33.Proctor R, Schiebinger LL. Agnotology: The Making and Unmaking of Ignorance. Stanford, CA.: Stanford University Press; 2008. [Google Scholar]
- 34.Ladin K, Smith AK. Active medical management for patients with advanced kidney disease. JAMA Intern Med. 2019;179(3):313-315. doi: 10.1001/jamainternmed.2018.6195 [DOI] [PubMed] [Google Scholar]
- 35.Kaufman SR. Ordinary Medicine: Extraordinary Treatments, Longer Lives, and Where to Draw the Line. Durham, NC: Duke University Press; 2015. [Google Scholar]
- 36.Kaufman SR, Shim JK, Russ AJ. Old age, life extension, and the character of medical choice. J Gerontol B Psychol Sci Soc Sci. 2006;61(4):S175-S184. doi: 10.1093/geronb/61.4.S175 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 37.Wong SP, Vig EK, Taylor JS, et al. Timing of initiation of maintenance dialysis: a qualitative analysis of the electronic medical records of a national cohort of patients from the Department of Veterans Affairs. JAMA Intern Med. 2016;176(2):228-235. doi: 10.1001/jamainternmed.2015.7412 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 38.Wong SPY, McFarland LV, Liu C-F, Laundry RJ, Hebert PL, O’Hare AM. Care practices for patients with advanced kidney disease who forgo maintenance dialysis. JAMA Intern Med. 2019;179(3):305-313. doi: 10.1001/jamainternmed.2018.6197 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 39.Schmidt RJ, Landry DL, Cohen L, et al. Derivation and validation of a prognostic model to predict mortality in patients with advanced chronic kidney disease [published online November 5, 2018]. Nephrol Dial Transplant. [DOI] [PubMed] [Google Scholar]
- 40.Cohen LM, Ruthazer R, Moss AH, Germain MJ. Predicting six-month mortality for patients who are on maintenance hemodialysis. Clin J Am Soc Nephrol. 2010;5(1):72-79. doi: 10.2215/CJN.03860609 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 41.Song MK, Hanson LC. Relationships between psychosocial-spiritual well-being and end-of-life preferences and values in African American dialysis patients. J Pain Symptom Manage. 2009;38(3):372-380. doi: 10.1016/j.jpainsymman.2008.11.007 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 42.Davison SN, Jhangri GS. The relationship between spirituality, psychosocial adjustment to illness, and health-related quality of life in patients with advanced chronic kidney disease. J Pain Symptom Manage. 2013;45(2):170-178. doi: 10.1016/j.jpainsymman.2012.02.019 [DOI] [PubMed] [Google Scholar]
- 43.Davison SN, Jhangri GS. Existential and religious dimensions of spirituality and their relationship with health-related quality of life in chronic kidney disease. Clin J Am Soc Nephrol. 2010;5(11):1969-1976. doi: 10.2215/CJN.01890310 [DOI] [PMC free article] [PubMed] [Google Scholar]
- 44.Jacobsen J, Whitlock SN, Lee H, Lindvall C, Jackson V. Teaching colleagues how to discuss prognosis as part of a hospital-wide quality improvement project: the positive impact of a 90-minute workshop. J Pain Symptom Manage. 2015;49(5):960-963. doi: 10.1016/j.jpainsymman.2014.11.301 [DOI] [PubMed] [Google Scholar]
- 45.Jacobsen J, Thomas JD, Jackson VA. Misunderstandings about prognosis: an approach for palliative care consultants when the patient does not seem to understand what was said. J Palliat Med. 2013;16(1):91-95. doi: 10.1089/jpm.2012.0142 [DOI] [PubMed] [Google Scholar]
- 46.Campbell TC, Carey EC, Jackson VA, et al. Discussing prognosis: balancing hope and realism. Cancer J. 2010;16(5):461-466. doi: 10.1097/PPO.0b013e3181f30e07 [DOI] [PubMed] [Google Scholar]
- 47.Smith AK, White DB, Arnold RM. Uncertainty—the other side of prognosis. N Engl J Med. 2013;368(26):2448-2450. doi: 10.1056/NEJMp1303295 [DOI] [PMC free article] [PubMed] [Google Scholar]
Associated Data
This section collects any data citations, data availability statements, or supplementary materials included in this article.
Supplementary Materials
Supplemental Tables, Figure, and Survey.
eTable 1. Characteristics of prevalent in-center hemodialysis patients
eTable 2. Adjusted association of self-reported patient characteristics with prognostic expectations
eFigure. Cohort derivation
eAppendix. USRDS Study about Treatment Preferences (UState) Patient Questionnaire



