A randomized control trial of a psychosocial intervention for caregivers of allogeneic hematopoietic stem cell transplant patients: effects on distress

The Role of Biomarkers in Research on Caregivers for Cancer Patients: A Scoping Review

BACKGROUND

Biomarkers can be used as prognostic, predictive, or monitoring indicators of an associated outcome. The purpose of this review was to provide a comprehensive summary of the research examining the use of biomarkers as surrogate end points for clinical outcomes in family caregivers for cancer patients, identify gaps, and make recommendations for future research.

METHODS

A scoping review, a process of mapping the existing literature, was conducted. Studies comparing biomarkers across caregivers and controls and/or examining relationships between biomarkers and psychological health were reviewed.

RESULTS

The studies ( N = 18) of caregivers for cancer patients who were identified used biomarkers to predict outcomes ( n = 13) and to monitor the efficacy of interventions ( n = 6). Biomarkers were divided into two categories based on physiological systems involved: (1) neuroendocrine function (sympathetic-adrenal-medullary axis activity, hypothalamic-pituitary-adrenal axis activity) and (2) immune function. Predictive biomarkers were sensitive to differences between caregivers and controls. The biomarkers were used to evaluate outcomes frequently associated with stress, depression, and anxiety. Cortisol was the biomarker most commonly measured to monitor the efficacy of interventions.

DISCUSSION

Biomarkers are most commonly incorporated into caregiver studies to predict group membership and psychological health. Neuroendocrine biomarkers, specifically cortisol, are most frequently assessed. Future research should include biomarkers of other physiologic functions (e.g., cardiovascular function, cognitive dysfunction, and cell aging) and those that serve as multisystem indicators. Expanding the scientific study of biomarkers will contribute to our understanding of the mechanisms through which stress may influence caregiver health.

A review of family caregiving intervention trials in oncology

This article contains a review of literature published from 2010 to 2016 on family caregiving in oncology. An analysis of 810 citations resulted in 50 randomized trials. These trials describe the need to prepare family caregivers for the complex role they play in cancer care. Several studies have demonstrated improved quality of life for family caregivers and improved emotional support from interventions. Several studies addressed communication and relational intimacy, which are key concerns. An additional focus of these trials was in the area of caregiving tasks and ways to diminish the burden of caregiving and preparedness for this role. Further research is needed in this area given the shift to outpatient care and as family caregivers become the primary providers of care. Future research should include expanding tested models of family caregiver support in clinical practice and in diverse populations. CA Cancer J Clin 2017. © 2017 American Cancer Society. CA Cancer J Clin 2017;67:318-325. © 2017 American Cancer Society.

Development of a Web-Based Intervention for Addressing Distress in Caregivers of Patients Receiving Stem Cell Transplants: Formative Evaluation With Qualitative Interviews and Focus Groups

Background

Caregivers of cancer patients experience significant burden and distress including depression and anxiety. We previously demonstrated the efficacy of an eight session, in-person, one-on-one stress management intervention to reduce distress in caregivers of patients receiving allogeneic hematopoietic stem cell transplants (allo-HSCT).

Objective

The objective of this study was to adapt and enhance the in-person caregiver stress management intervention to a mobilized website (eg, tablet, smartphone, or computer-based) for self-delivery in order to enhance dissemination to caregiver populations most in need.

Methods

We used an established approach for development of a mhealth intervention, completing the first two research and evaluation steps: Step One: Formative Research (eg, expert and stakeholder review from patients, caregivers, and palliative care experts) and Step Two: Pretesting (eg, Focus Groups and Individual Interviews with caregivers of patients with autologous HSCT (auto-HSCT). Step one included feedback elicited for a mock-up version of Pep-Pal session one from caregiver, patients and clinician stakeholders from a multidisciplinary palliative care team (N=9 caregivers and patient stakeholders and N=20 palliative care experts). Step two included two focus groups (N=6 caregivers) and individual interviews (N=9 caregivers) regarding Pep-Pal’s look and feel, content, acceptability, and potential usability/feasibility. Focus groups and individual interviews were audio-recorded. In addition, individual interviews were transcribed, and applied thematic analysis was conducted in order to gain an in-depth understanding to inform the development and refinement of the mobilized caregiver stress management intervention, Pep-Pal (PsychoEducation and skills for Patient caregivers).

Results

Overall, results were favorable. Pep-Pal was deemed acceptable for caregivers of patients receiving an auto-HSCT. The refined Pep-Pal program consisted of 9 sessions (Introduction to Stress, Stress and the Mind Body Connection, How Thoughts Can Lead to Stress, Coping with Stress, Strategies for Maintaining Energy and Stamina, Coping with Uncertainty, Managing Changing Relationships and Communicating Needs, Getting the Support You Need, and Improving Intimacy) delivered via video instruction through a mobilized website.

Conclusions

Feedback from stakeholder groups, focus groups, and individual interviews provided valuable feedback in key areas that was integrated into the development of Pep-Pal with the goal of enhancing dissemination, engagement, acceptability, and usability.

National Institutes of Health Hematopoietic Cell Transplantation Late Effects Initiative: The Patient-Centered Outcomes Working Group Report

In 2015, the National Institutes of Health convened six working groups to address the research needs and best practices for late effects of hematopoietic stem cell transplantation survivors. The Patient-Centered Outcomes Working Group, charged with summarizing the HRQOL evidence base, used a scoping review approach to efficiently survey the large body of literature in adult and pediatric HCT survivors over 1 year after transplantation. The goals of this paper are to (1) summarize the current literature describing patient-centered outcomes in survivors, including the various dimensions of health-related quality of life affected by HCT, and describe interventions tested to improve these outcomes; (2) highlight areas with sufficient evidence allowing for integration into standard practice; (3) address methodological issues that restrict progress in this field; (4) identify major gaps to guide future research; and (5) specify priority research recommendations. Patient-centered outcomes were summarized within physical, psychological, social, and environmental domains, as well as for adherence to treatment, and health behaviors. Interventions to improve outcomes were evaluated for evidence of efficacy, although few interventions have been tested in long-term HCT survivors. Methodologic issues defined included lack of consistency in the selection of patient-centered outcome measures, along with the absence of a standard for timing, frequency, and mode of administration. Recommendations for HCT survivorship care included integration of annual screening of patient-centered outcomes, use of evidence-based practice guidelines, and provision of treatment summaries and survivorship care plans after HCT. Three priority research recommendations included the following: (1) design and test risk-targeted interventions with dose-intensity modulation matching the needs of HCT survivors with priority domains, including sexual dysfunction, fatigue, sleep disruption, nonadherence to medications and recommended health care, health behaviors including physical inactivity and healthy eating, and psychological dysfunction, with particular consideration of novel technologies to reach HCT survivors distant from their transplantation centers; (2) design a consensus-based methodologic framework for outcomes evaluation; and (3) evaluate and compare existing practices for integrating patient-centered outcome screening and interventions across HCT survivorship programs.

An evidence-based stress management intervention for allogeneic hematopoietic stem cell transplant caregivers: development, feasibility and acceptability

PURPOSE

Caregivers of cancer patients face challenges impacting their physical, psychological and social well-being that need attention in the form of well-designed and tested interventions. We created an eight-session individual stress management intervention for caregivers of allogeneic hematopoietic stem cell transplant (Allo-HSCT) recipients. This intervention, tested by randomized control trial, proved effective in decreasing distress. Herein, we describe the intervention including theoretical framework, development, and elements of fidelity. Implementation challenges along with recommendations for refinement in future studies are discussed with the goal of replication and dissemination.

METHODS

Seventy-four of 148 caregivers received stress management training following randomization. The intervention occurred during the 100-day post-transplant period when caregivers are required. The training provided integrated cognitive behavioral strategies, psychoeducation, and problem-solving skills building as well as use of a biofeedback device.

RESULTS

Seventy percent of caregivers completed all eight sessions indicating good acceptability for the in-person intervention; however, most caregivers did not reliably use the biofeedback device. The most common reason for drop-out was their patient becoming gravely ill or patient death. Few caregivers dropped out because of study demands. The need for flexibility in providing intervention sessions was key to retention.

CONCLUSION

Our evidence-based stress management intervention for Allo-HSCT caregivers was feasible. Variability in acceptability and challenges in implementation are discussed and suggestions for refinement of the intervention are outlined. Dissemination efforts could improve by using alternative methods for providing caregiver support such as telephone or video chat to accommodate caregivers who are unable to attend in-person sessions.

A scoping review of caregiver burden during allogeneic HSCT: lessons learned and future directions

The extant literature documents burden among caregivers of patients undergoing a hematopoietic stem cell transplantation (HSCT), but little is known about the burden of caregivers of patients receiving outpatient and homebound HSCTs. This scoping study sought to evaluate what is known about the burden of the increasing number of adult caregivers of patients receiving outpatient HSCTs and to create practice guidelines for how to best support this vulnerable group. Online databases were searched for studies that evaluated caregiver burden in adult caregivers of HSCT patients since 2010 (the publication date of the most recent systematic review on HSCT caregiver burden). Of the 1271 articles retrieved, 12 met the inclusion criteria, though none specifically examined outpatient or homebound caregivers. Overall, studies corroborated existing literature on the experience of significant burden among HSCT caregivers across the HSCT trajectory, and highlighted the emotional costs of outpatient transplants on caregivers and the need to identify caregivers at high risk for burden early in the transplant process. Future studies of outpatient caregivers should include a comprehensive assessment of burden and seek to identify points along the transplant trajectory at which caregivers are at particular risk for negative outcomes and when intervention is most appropriate.

Documenting stress in caregivers of transplantation patients: initial evidence of HPA dysregulation

There is growing evidence linking caregiver stress with an increased risk for morbidity and mortality. While the emotional and practical burden experienced by caregivers is well established, the physiological changes that may affect the caregiver's health are less understood. This study sought to compare self-reported stress, anxiety and depression along with neuroendocrine and immune markers of stress among adult caregivers of allogeneic hematopoietic stem cell transplantation patients during the acute transplant recovery period to matched non-caregivers controls. Biomarkers and self-reported data were collected at three points during the patient's HSCT: (1) before transplant, (2) after initial transplantation discharge (±7 days) and (3) 6 weeks after initial transplantation discharge. Mixed linear modeling was used to examine differences by group and time. Twenty-one caregivers and 20 controls completed all study procedures. The majority of caregivers were female (57% or 57.1%) and married (95.2%), with a mean age of 52 ± 11.4 years. Caregiver perceived stress, anxiety and depression scores were significantly higher than controls (p < 0.001) with effect sizes (ES) ranging from 1.37 to 1.80 and they did not change over time (p > 0.05) for either group. Caregivers had significantly lower serum cortisol levels than controls at both discharge (p = 0.013; ES = 0.81) and 6 weeks after discharge (p = 0.028; ES = 0.72) but exhibited no significant relationship between self-reported stress and serum cortisol. In addition, caregivers showed a significant inverse relationship between stress and epinephrine levels (r(s)=-0.654, p = 0.021). These findings support the evidence of the caregiving experience being stressful. The counter-intuitive relationship between cortisol and epinephrine might suggest dysregulation of the HPA axis and central nervous system but additional research on the physiological impact of caregiving is warranted.

Intraindividual Cortisol Variability and Psychological Functioning in Caregivers of Hematopoietic Stem Cell Transplant Patients

OBJECTIVE

Caregiving for allogeneic hematopoietic stem cell transplant (Allo-HSCT) patients carries a significant psychological burden, yet it remains unclear whether Allo-HSCT caregivers demonstrate disruptions to stress systems, such as the hypothalamic-pituitary-adrenal axis. Greater intraindividual cortisol variability (ICV) has been observed in psychiatric disorders; however, there is a knowledge gap evaluating ICV in caregivers. We predicted that greater ICV would be related to poorer mental health in Allo-HSCT caregivers.

METHODS

Allo-HSCT caregivers (n = 140) collected saliva for 3 consecutive days at 4 time points/d. Psychological variables included sleep quality and a summary composite score of overall mental health.

RESULTS

Regression analyses demonstrated that greater ICV was significantly related to poorer overall mental health (β = 0.25, p = .009), whereas poorer sleep did not reach significance (β = 0.16, p = .069). No significant relationships emerged for the cortisol area under the curve, diurnal decline, or awakening response.

CONCLUSIONS

Results extend prior work examining ICV as a unique marker that is possibly more sensitive than other widely applied measures of hypothalamic-pituitary-adrenal axis dysregulation to a distressed population of caregivers.