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Research

Effect of pediatric palliative care programs on health care resource utilization and costs among children with life-threatening conditions: a systematic review of comparative studies

Tania Conte, Craig Mitton, Logan M. Trenaman, Negar Chavoshi and Harold Siden
February 27, 2015 3 (1) E68-E75; DOI: https://doi.org/10.9778/cmajo.20140044
Tania Conte
1School of Population and Public Health, University of British Columbia, Vancouver, BC
2Centre for Clinical Epidemiology and Evaluation, Vancouver, BC
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Craig Mitton
1School of Population and Public Health, University of British Columbia, Vancouver, BC
2Centre for Clinical Epidemiology and Evaluation, Vancouver, BC
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Logan M. Trenaman
1School of Population and Public Health, University of British Columbia, Vancouver, BC
2Centre for Clinical Epidemiology and Evaluation, Vancouver, BC
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Negar Chavoshi
1School of Population and Public Health, University of British Columbia, Vancouver, BC
3Canuck Place Children’s Hospice, Vancouver, BC
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Harold Siden
3Canuck Place Children’s Hospice, Vancouver, BC
4Child and Family Research Institute, Vancouver, BC
5Division of General Pediatrics, Department of Pediatrics, University of British Columbia, Vancouver, BC
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Abstract

Background Pediatric palliative care is a relatively new and evolving field, and the cost of pediatric palliative care programs is unclear. We conducted a systematic review to compare inpatient health care utilization and costs among children with life-threatening conditions who have accessed a pediatric palliative care program and those who have not.

Methods We searched MEDLINE, Embase, CINAHL and LILACS databases from January 2000 to July 2013, as well as the grey literature, for experimental or observational studies that compared pediatric palliative care programs with usual care. Outcomes of interest included hospital admissions, length of stay and health care costs.

Results Of the 5193 records identified, we reviewed 109 in full and included 11 in our study. The overall quality of the studies was moderate to low. We observed mixed results for all outcomes. Compared with patients receiving usual care, fewer patients in the palliative care group had hospital admissions and fewer of those with cancer had planned hospital admissions. In contrast, no effects were observed regarding the overall number of hospital, emergency or outpatient admissions. Conflicting results were observed with regards to critical care utilization. Studies showed a trend toward shorter lengths of stay in hospital in the palliative care group. However, a single study that also considered inpatient time in hospice facilities found an increase in total length of stay, which showed a shift in the setting of health care utilization. We observed no conclusive trend in the effects on cost.

Interpretation Evidence suggests that pediatric palliative care programs may result in a shift of utilization to other health care settings beyond hospital care. These settings should be considered when measuring resource utilization and costs.

Pediatric palliative care can be summarized as “an active and total approach to care focused on the enhancement of quality of life for the children with life-threatening conditions and support for the family”.1 A life-threatening condition is a condition with no established cure, or for which available treatment has not succeeded, and survival to full adulthood is unlikely. Children requiring, but not enrolled in, a pediatric palliative care program (PPCP) access usual care often through uncoordinated acute care admissions and some episodes of home care, but potentially with some compromise to continuity of care where critical components for family support are lacking. Complex care plans and fluctuating patient needs necessitate a coordination of care within individualized support systems.

Pediatric palliative care is a relatively new and evolving field. It varies from adult palliative care in important ways. From a resource utilization perspective, pediatric palliative care is usually delivered over a longer time frame.2,3

It is unclear how enrolment in a PPCP affects health care utilization and costs compared with usual care. Understanding such outcomes may improve the efficiency of health care services for children with life-threatening conditions and support evidence-based planning and resource allocation for PPCPs. We conducted a systematic review of the published literature where inpatient health care resource utilization and costs were compared between children with life-threatening conditions who accessed a PPCP and those who did not.

Methods

Search strategy

The systematic review was performed according to PRISMA guidelines.4 We searched MEDLINE, Embase, CINAHL and LILACS databases. For feasibility, and given the relatively recent development of PPCPs, we limited the search to articles published after 2000. The search was completed on July 18, 2013, with weekly automated alerts for publications after this date. No language restrictions were applied. Complementary scanning of reference lists, consultation with experts and searches of grey literature were also undertaken. The search strategies are shown in Appendix 1 (available at www.cmajopen.ca/content/3/1/E68/suppl/DC1).

We included published articles and abstracts describing comparative studies (randomized clinical trials, experimental or observational studies, and secondary administrative database analyses), regardless of the length of the observation period. Studies were eligible if they included a comprehensive PPCP or its components (e.g., palliative care consultation, respite care, end-of-life care or planning, hospice and community-based palliative care) and they exclusively included children with life-threatening conditions who were 22 years of age or younger. Although there is no consistency to the upper age limit in this population,1,5 programs can support transition to adult palliative care services up to the age of 22 (e.g., the Seattle Pediatric Palliative Care Project6).

Outcomes included potential quality of end-of-life indicators that were identified by the established adult literature and were measureable from administrative data.7 Our primary outcomes of interest were utilization of health care resources, including hospital admissions and length of stay; and health care costs (direct, indirect and total expenditures). Secondary outcomes of interest included resource utilization in the last admission before death, as measured by length of stay, number of invasive procedures to prolong life and number of resuscitative attempts.

Study selection, quality assessment and data extraction

Two researchers (T.C. and L.M.T.) conducted independent reviews of titles and abstracts identified in the literature search. Discrepancies were resolved by discussion or the involvement of a third reviewer with clinical expertise in PPCPs (H.S.). Data were extracted by the same 2 who conducted the study selection, to ensure consistency of reporting. Discrepancies were handled in the same manner as study identification. Study characteristics were displayed in tables, to assist in exploration of each study’s approach to program evaluation. A meta-analysis was not feasible because of considerable heterogeneity in study populations, outcome measures, observation periods and reporting of PPCP components. We assessed the included full-text articles for study quality using the Newcastle–Ottawa Scale8 (detailed in Appendices 2 and 3, available at www.cmajopen.ca/content/3/1/E68/suppl/DC1). According to the scale, a study is judged on 3 broad perspectives: the selection of the study groups; the comparability of the groups; and the ascertainment of the outcome. The greater the number of stars (maximum 9), the higher the quality of the article.

Results

Study selection

Using the search strategy, we retrieved 5193 records, 1428 of which were duplicates. We excluded a further 3656 after screening the titles and abstracts, and retrieved 109 papers for full-text review (κ value = 0.25, 95% confidence interval [CI] 0.22–0.28, indicating fair agreement according to Fleiss9). Nine articles fulfilled the inclusion criteria (Figure 1),5,10–17 (κ = 0.83, 95% CI 0.64–1.00, indicating almost perfect agreement). Two additional studies18,19 were identified in the weekly automated search updates, for a total of 11 included studies.

Figure 1:
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Figure 1:

Flow diagram of study selection.

Study characteristics

All of the 11 studies were retrospective observational studies. Full descriptive characteristics are presented in Appendix 3 (available at www.cmajopen.ca/content/3/1/E68/suppl/DC1) and summarized in Table 1.

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Table 1: Characteristics of 11 studies comparing pediatric palliative care programs and usual care identified through the systematic review

Four cohort comparisons11,12,14,15 used administrative data and survey techniques14 to explore differences between cohorts of children with and without access to PPCPs. Observation periods varied, from the last day of admission before death to the referral to a PPCP. Two articles included only cancer-related deaths,11,14 and two included deaths from any cause.12,15 The interventions by which children were classified as being in the PPCP group included use of a PPCP (program or hospice provider11,15) or inpatient palliative care consultation.12 One study focused on an important element of PPCP, advance care planning, as identified by parental planning of the child’s location of death.14 Three studies were based in the United States12,14,15 and one in the United Kingdom.11

Four before–after studies used administrative data5,18 and chart reviews10,13 to explore differences in outcomes before and after access to a PPCP. Three of the studies compared outcomes in the same group of patients before and after program enrolment and included children with life-threatening conditions.5,13,18 The other study compared historical cohorts of children with brain tumours before and after implementation of a standardized program for end-of-life care.10 Observation periods varied, from 12 months to 10 years. Determining the point at which children entered the program was based on hospice use,13 explicit enrolment in the program5,18 or the date of program implementation.10 Three studies were based in the US5,10,18 and one in Canada.13

One article was classified as a case–control study by the authors, but it was actually a cohort comparison.17 This US study relied on administrative data to compare children enrolled in a PPCP with those who were not, 6 months before death.

One conference abstract19 described a cohort comparison that was combined with a before–after analysis of the PPCP group based on administrative data in the US. It identified the PPCP group by the presence of a palliative care consultation and had a 2-year observation period.

The last article, a case series from the US,16 included only 3 patients. The authors observed procedures received in 1 day of home-based PPCP and compared the costs with those of procedures received in hospital.

Quality assessment

According to the Newcastle–Ottawa Scale quality assessment, 5 of the articles received five or six stars, and 6 received four stars or less. Studies were classified as having moderate to high risk of bias (Table 2; Appendix 4 at www.cmajopen.ca/content/3/1/E68/suppl/DC1).

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Table 2: Summary of quality assessment
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Table 4: Effect of pediatric palliative care programs versus usual care on length of stay

Numerous studies had limitations in their methodology. For example, one study12 included only children who died 5 or more days after admission; the authors excluded individuals who did not choose life-extending measures to prolong their stay beyond 5 days and children who were discharged to die at home. This definition would affect both hospital admissions and costs, leaving the true difference between programs to be greater. Furthermore, the PPCP group was identified via billing codes for palliative care encounter (ICD-9 code V66.7). If the services were billed under the code of the primary condition, children in the palliative care program would have been misclassified to the usual care group. The direction and magnitude of this bias is uncertain. In another study,11 the authors did not measure or control whether children were still in disease-directed treatment in both groups — a factor for decreased planned admissions. It is also unclear whether admissions to the hospice for symptom management were included in the overall number of admissions, making it uncertain whether the results represent a shift in health care setting or a decrease in resource utilization. In addition, the conference abstract19 did not present sufficient information on methodology.

Only 2 studies addressed confounding in the outcome analysis.11,18 One study11 investigated the effect on the number of hospital admissions in a cohort PPCP hospice cohort from time of referral to death. The authors controlled for age, disease, sex and Townsend deprivation score. The deprivation score20 is based on unemployment, non–car ownership, non–home ownership and household overcrowding. The authors did not address survival bias (whether the length of the study period was similar between groups) or include the number of hospice admissions in the PPCP group. Therefore, the number of hospital admissions in the PPCP group must be interpreted with caution because of shifts in care setting rather than decreases in health care utilization. The other study was a before–after study18 that controlled for time exposed to a palliative care program; however, because the authors did not include a control group for comparison, it was unclear whether the observed decrease in length of stay and costs in the PPCP period was a consequence of the program or a natural trend among patients approaching death. In addition, the authors did not control for place of death and costs associated with home care, both of which can bias results.

Effect on admissions

Seven articles investigated admissions10–14,18,19 (Table 3). Four did so by measuring the proportion of patients who had some type of admission10,12,14,19 and 3 measured number of hospital admissions.11,13,18 Among PPCP recipients, the proportion of patients with hospital admissions decreased.10,14 Although no effect on the number of patients with emergency admissions was found,14 findings on the proportion of patients using critical care were conflicting.12,19 Exclusion of articles with the lowest quality assessment (≤ 4 stars) seemed to favour PPCP. With respect to number of hospital admissions, we found no difference in overall admissions, emergency visits and outpatient visits after implementation of a PPCP,13,18 or between PPCP users and controls.11 Among cancer patients, one study showed a decrease in planned hospital admissions in the PPCP group,11 and another study reported an increase in the number of hospital admissions with longer exposure to PPCP18 — a reflection of survival. Exclusion of articles with the lowest quality assessments did not alter the results.

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Table 3: Effect of pediatric palliative care programs versus usual care on admissions

Effect on length of stay

Six studies investigated the influence of PPCP on length of stay5,10,13,14,17,18 (Table 4). Most showed a decrease in hospital length of stay associated with PPCP.5,10,13,14,18 However, statistical significance was not tested or reached in some of the articles.5,10,14 One study found no difference between groups.17 The only study that explicitly included combined length of stay in hospital and hospice found an overall increase in length of stay.13 Exclusion of the articles that did not test for significance resulted in complete discordance between studies.

Effect on health care costs

Eight studies measured the influence of PPCP on health care costs5,12,13,15–19 (Table 5). Studies were heterogeneous and had conflicting results. Six articles showed reduced costs associated with PPCP.5,12,13,16–18 Two articles reported increased costs among PPCP users compared with controls;15,19 no significant difference in costs was found after implementation of PPCP.19 However, most authors failed to test for significance.5,15–17 Exclusion of these articles and the studies with the lowest quality assessments5,13,16 did not change the findings. Two studies with comprehensive outcome measures across hospice and hospital costs had conflicting results with regard to the direction of effects: a decrease in costs in the Canadian health care setting13 and an increase in the American setting.15

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Table 5: Effect of pediatric palliative care programs versus usual care on costs

Secondary outcomes

Only one study compared length of stay during the last admission before death.12 The authors reported a shorter median stay among children who died from any cause and had access to palliative care consultation than among those without such consultation (17 d [interquartile range (IQR) 9–36] v. 21 d [IQR 10–47], p < 0.001).

Resource utilization in the last admission before death

Two cohort studies reported on the use of invasive procedures to prolong life during the last admission before death. One study12 found that, among children who died from any cause, those with a palliative care consultation had a significantly lower relative risk (RR) of receiving certain procedures. These included invasive mechanical ventilation (RR 0.14, 95% CI 0.12–0.16), adrenergics (RR 0.15, 95% CI 0.11–0.2), sedatives (RR 0.25, 95% CI 0.2–0.3) and analgesics (RR 0.53, 95% CI 0.47–0.6). These children also had a higher probability of receiving noninvasive mechanical ventilation (RR 1.6, 95% CI 1.3–1.9) and intracranial pressure monitoring or extraventricular device (RR 2.8, 95% CI1.6–5.0). The second study14 reported a lower proportion of intubations in the final 24 hours of life (21% v. 48%, p = 0.029), with no difference in the proportion of withdrawal of other support measures (36% v. 19%, p = 0.123), among cancer patients who had a planned location of death versus those who did not.

Two cohort studies examined resuscitation interventions. One study12 showed that, among children who died from any cause, those with a palliative care consultation had a significantly lower relative risk of cardioversion (RR 0.49, 95% CI 0.38–0.62) than those without a consultation. The second study14 reported a lower proportion of cardiopulmonary resuscitation attempts among cancer patients who had a planned location of death (4% v. 19%, p = 0.142) versus those who did not.

Interpretation

The primary articles investigating the influence of PPCP on health care utilization showed fewer hospital admissions among children enrolled in PPCPs10,14 and fewer planned hospital admissions among cancer patients in such programs.11 The overall number of hospital, emergency and outpatient admissions was not affected.11,13,14,18 Conflicting results were observed with regard to the proportion of patients undergoing critical care.12,19 Most of the studies showed shorter hospital stays among PPCP users.5,10,13,14,18 When inpatient time in hospice facilities was considered,13 length of stay became longer for PPCP patients. Regarding costs of health care, no conclusive impact of PPCPs could be drawn from the primary studies5,12,13,15–18 owing to conflicting results and heterogeneity in comprehensiveness of outcome measures. From the more comprehensive studies that included hospice and hospital costs, we observed an overall decrease in costs in the Canadian health care setting13 and an increase in the American setting.15 For end-of-life admissions, PPCP users had a shorter stay12 and less aggressive care to prolong life.12,14 However, focusing solely on hospital utilization has limitations, because it does not consider impacts on the health care system in totality, nor the financial burden borne by families. More rigorous study designs with broader perspectives that include expected costs incurred in other settings should be undertaken.

Interpreting the reviewed studies was challenging because of numerous limitations of the primary articles, and study contexts. Questions remain regarding risk of bias, selection and identification of participants, and intervention classification. Most of the studies focused on hospital admissions and did not account for other types of resource utilization (hospice, home care, other facilities). Studies that showed a decrease in length of stay among PPCP users5,10,17,18 did not investigate the number of days spent in hospice or other facilities, which again leaves uncertainty as to whether a decrease in resource utilization or a shift in health care setting occurred.

The only study that measured both hospital and hospice admissions found an increase in the total combined length of stay, which showed a shift in the setting of health care utilization from hospital to hospice.13 Despite this shift, a significant decrease in monthly costs was observed, owing to the difference in average daily costs between settings in the Canadian health care system. A similar trend was shown in the US by Gans and colleagues,5 who found a shift in resource utilization, from a decline in inpatient care costs to a surge in outpatient care and pharmaceutical costs. Nonetheless, an overall 11% decrease in health care costs after the implementation of the community-based PPCP occurred. However, this study neither tested for statistical significance nor adjusted for survival time after program enrolment. Conversely, another American study15 found hospice users to have higher expenditures in all types of admissions (hospice, inpatient, outpatient, emergency department) and pharmacy expenses. This study allocated patients to the PPCP group based on billing codes for hospice services. However, some patients in the non–hospice user group died at the hospice, which showed the limitation of using billings to identify patients. It is unclear whether costs of health care differ when studies refer to them as charges, expenditures or costs. Another important limitation was observed by Belasco and colleagues,16 who listed the procedures/services received at home and estimated the equivalent cost at the tertiary care centre. Costs were discrepant, however, because the authors did not account for uninsured home care procedures. It is unclear whether these were out-of-pocket costs for the families or waived by health care providers. Therefore, charges did not appropriately reflect costs, which introduced important measurement bias.

Limitations

Despite a thorough search of the literature with no language restrictions, we were unable to identify relevant randomized controlled trials or prospective studies. We included only studies that compared palliative care and usual care. No indirect comparison was contemplated with single-arm observational studies. According to the Newcastle–Ottawa Scale quality assessment, the overall quality of evidence was moderate to low. In particular, the risk of selection bias to PPCP (given the nature of the referral process) is of major concern. Furthermore, information bias and misclassification is a threat to internal validity in observational studies based on secondary databases. The considerable heterogeneity in outcome measures, observation period, scope of PPCP elements provided by the programs, characteristics, reporting of program components, and whether reported interventions accurately represented the enrolment of children and families in a PPCP are worth noting. Information bias may have affected the allocation of patients to groups. Because PPCP is a relatively new and evolving specialty, the mode of recording services (claims, bills and codes) may have changed over time. Consequently, the use of palliative care services could have been underreported or reported differently from usual care. Furthermore, practitioners in both PPCP and usual care may provide either type of care to children in both groups (e.g., increasing curative efforts for children in a PPCP or focusing on palliative care for those in usual care), which would affect coding and classification. Moreover, the specific context and funding models for the different health care systems may have affected the results. Therefore, both the evidence and its applicability should be interpreted with caution.

Conclusion

The published evidence to support the planning and reallocation of resources for PPCPs by estimating their impact on health care resource utilization and costs was of moderate to low methodologic quality. Depending on the health care system, PPCP may increase costs, but in the Canadian context, they may be cost saving. The paucity of evidence with broad approaches to measurement is not only in conflict, but very context dependent. Prospective studies are needed to evaluate the overall impact of PPCPs on the health care system from perspectives beyond that of the tertiary care provider, while measuring shifts in health care settings and family burden. Improved study designs can address the various aforementioned biases and classification issues. Standardization of outcome measures can enhance comparability and pooling of findings from future studies. Noting these limitations, this review provides an important first step toward a more comprehensive understanding of the impact of PPCPs on resource utilization across various health care settings.

Supplemental information

For reviewer comments and the original submission of this manuscript, please see www.cmajopen.ca/content/3/1/E68/suppl/DC1.

Acknowledgement

The authors acknowledge the contribution of Madeleine Doyle-Waters, librarian at the Centre for Clinical Epidemiology and Evaluation, who supported the construction and optimization of the search strategies.

Footnotes

  • Competing interests: None declared.

  • Contributors: Tania Conte, Craig Mitton, Negar Chavoshi and Harold Siden contributed to the study concept, and Tania Conte and Craig Mitton to the study design. Tania Conte and Logan Trenaman contributed to the acquisition of data. Tania Conte, Logan Trenaman, Craig Mitton, Negar Chavoshi and Harold Siden contributed to the analysis and interpretation of data. Tania Conte drafted the article; all of the authors revised it critically for important intellectual content, approved the final version submitted for publication and agreed to act as guarantors of the work.

  • Funding: This review did not receive funding and is part of a masters thesis project for the School of Population and Public Health at the University of British Columbia. Tania Conte and Logan Trenaman were funded by External Graduate Awards (Pfizer HTAcademy Scholarships) for students in the Health Economics Concentration.

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CMAJ Open: 3 (1)
Vol. 3, Issue 1
13 Jan 2015
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Effect of pediatric palliative care programs on health care resource utilization and costs among children with life-threatening conditions: a systematic review of comparative studies
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Effect of pediatric palliative care programs on health care resource utilization and costs among children with life-threatening conditions: a systematic review of comparative studies
Tania Conte, Craig Mitton, Logan M. Trenaman, Negar Chavoshi, Harold Siden
Jan 2015, 3 (1) E68-E75; DOI: 10.9778/cmajo.20140044

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Effect of pediatric palliative care programs on health care resource utilization and costs among children with life-threatening conditions: a systematic review of comparative studies
Tania Conte, Craig Mitton, Logan M. Trenaman, Negar Chavoshi, Harold Siden
Jan 2015, 3 (1) E68-E75; DOI: 10.9778/cmajo.20140044
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