Theories, models, and frameworks related to sleep-wake disturbances in the context of cancer

Does a multimodal prehabilitation program improve sleep quality and duration in patients undergoing colorectal resection for cancer? Pilot randomized control trial

Sleep difficulties are a common symptom in cancer patients at different stages of treatment trajectory and may lead to numerous negative consequences for which management is required. This pilot Randomized Controlled Trial (RCT) aims to assess the potential effectiveness of home-based prehabilitation intervention (prehab) on sleep quality and parameters compared to standard care (SOC) in colorectal cancer patients during the preoperative period and up to 8 weeks after the surgery. One hundred two participants (48.3% female, mean age 65 years) scheduled for elective resection of colorectal cancer were randomized to the prehab (n = 50) or the SOC (n = 52) groups. Recruitment and retention rates were 54% and 72%, respectively. Measures were completed at the baseline and preoperative, 4- and 8-week after-surgery follow-ups. Our mixed models' analyses revealed no significant differences between groups observed over time for all subjective and objective sleep parameters. A small positive change was observed in the perceived sleep quality only at the preoperative time point for the prehabilitation group compared to the SOC group, with an effect size d = 0.11 and a confidence interval (CI) between - 2.1 and - 0.1, p = .048. Prehab group patients with high anxiety showed a significant improvement in the rate of change of sleep duration over time compared to the SOC group, with a difference of 110 min between baseline and 8 weeks after surgery (d = 0.51, 95% CI: 92.3 to 127.7, p = .02). Multimodal prehabilitation intervention is feasible in colorectal cancer patients and may improve sleep duration for patients with high anxiety symptoms. Future large-scale RCTs are needed to confirm our results.

Effects and moderators of exercise on sleep in adults with cancer: Individual patient data and aggregated meta-analyses

OBJECTIVES

To evaluate the effects of exercise interventions on sleep disturbances and sleep quality in patients with mixed cancer diagnoses, and identify demographic, clinical, and intervention-related moderators of these effects.

METHODS

Individual patient data (IPD) and aggregated meta-analyses of randomized controlled trials (RCTs). Using data from the Predicting OptimaL cAncer RehabIlitation and Supportive care project, IPD of 2173 adults (mean age = 54.8) with cancer from 17 RCTs were analyzed. A complementary systematic search was conducted (until November 2018) to study the overall effects and test the representativeness of analyzed IPD. Effect sizes of exercise effects on self-reported sleep outcomes were calculated for all included RCTs. Linear mixed-effect models were used to evaluate the effects of exercise on post-intervention outcome values, adjusting for baseline values. Moderator effects were studied by testing interactions for demographic, clinical and intervention-related characteristics.

RESULTS

For all 27 eligible RCTs from the updated search, exercise interventions significantly decreased sleep disturbances in adults with cancer (g = -0.09, 95% CI [-0.16; -0.02]). No significant effect was obtained for sleep quality. RCTs included in IPD analyses constituted a representative sample of the published literature. The intervention effects on sleep disturbances were not significantly moderated by any demographic, clinical, or intervention-related factor, nor by sleep disturbances.

CONCLUSIONS

This meta-analysis provides some evidence that, compared to control conditions, exercise interventions may improve sleep disturbances, but not sleep quality, in cancer patients, although this effect is of a small magnitude. Among the investigated variables, none was found to significantly moderate the effect of exercise interventions on sleep disturbances.

The Theory of Unpleasant Symptoms in Pediatric Oncology Nursing: A Conceptual and Empirical Fit?

Symptom management knowledge is a priority for pediatric oncology nursing research. Theories and models can frame the studies of symptoms experienced during childhood cancer. This article describes and analyzes the middle-range theory, theory of unpleasant symptoms (TOUS), for its conceptual and empirical fit with pediatric oncology nursing based on its current use in adult oncology research and its limited use to date in pediatric oncology. Searches in PubMed and CINAHL databases using the keywords theory of unpleasant symptoms and cancer and covering the time period 2000 to 2017 yielded 103 abstracts for review. Twenty published reports met eligibility criteria for review; only one included pediatric oncology patients. No study to date has tested all the components of the TOUS in pediatrics. The TOUS component of performance appears to be underaddressed across completed studies that instead include a focus on patient-reported quality of life rather than on perceived behavioral or performance indicators concurrent with the subjective symptom reports. Additionally, the influence of family, essential in pediatric oncology, is absent in the majority of studies guided by the TOUS. The TOUS is a structurally complicated framework that would be a conceptual fit for pediatric oncology if family influence and perceived function were included. Studies across this population and guided by the TOUS are needed, although testing all the theorized linkages in the TOUS would likely require a large sample size of patients and, thereby, multisite approaches given that cancer is a rare disease in childhood.

Agenda for Sleep Research in Older Adults With Cancer: A Conference Report

BACKGROUND

Sleep problems are common but often neglected in older adults, particularly in the context of cancer. Underlying mechanisms are poorly understood and interventions frequently lack a clear scientific basis.

OBJECTIVE

The objective of this report was to examine scientific content presented at a National Institutes of Health-sponsored U13 "Bedside to Bench" conference using a qualitative and iterative review procedure. Analysis of current scientific issues regarding sleep in older adults with cancer is needed to direct nurse scientists and clinicians toward research opportunities.

METHODS

A multistep review procedure for the analysis/synthesis of knowledge gaps and research opportunities was undertaken by oncology nurse scientists in attendance.

RESULTS

Conceptual problems in this area include the lack of standard sleep terminology and absence of an overarching conceptual model. Methodological problems are inconsistent sleep/napping measurement and complex operational challenges in designing comprehensive yet feasible studies in older adults. Knowledge gaps in basic and clinical science relate to cellular and molecular mechanisms that underlie sleep and circadian rhythm disturbances, contribution of sleep to adverse outcomes, and impact of disturbed sleep during hospitalization and the transition from hospital to home.

CONCLUSIONS

Focused and interdisciplinary research that advances conceptual and operational understanding of biological and behavioral determinants of sleep health in the aging cancer population can lead to more effective, safe, and targeted interventions for those with cancer-related sleep-circadian disturbances.

IMPLICATIONS FOR PRACTICE

Research that addresses current conceptual, methodological, and physiological issues can lead to more effective, safe, and targeted care for older adults with cancer-related sleep-circadian disturbances.

Impact of a nurse-led sleep programme on the sleep quality and depressive symptomatology among older adults in nursing homes: A non-randomised controlled study

BACKGROUND

Sleep problems are much more prevalent in nursing home residents than in their community-dwelling counterparts. Cognitive behavioural therapy is likely to improve sleep quality in older adults. However, these interventions have a narrow scope to generalise to nursing home practice, and there are minimal data on the effectiveness of the integration of cognitive behavioural therapy and motivational interviewing in nursing home settings.

AIM

The purpose of this study was to investigate the impact of a nurse-led sleep programme on the sleep quality and depressive symptomatology in cognitively intact nursing home residents.

METHODS

A non-randomised controlled study design was applied to 52 older adults living in three different nursing homes in the same locality. Then, we categorised our study cohort into the following two groups: intervention group in which the older adults received the nurse-led sleep programme and control group in which the older adults received regular nursing home services. One nursing home was assigned to the intervention, and two were assigned to control. The intervention group participated in four weekly 1-hr sessions performed by the first author.

RESULTS

Follow-up assessments conducted at 8 and 12 weeks after the intervention ended revealed that participants in the intervention group experienced a significant improvement in some objective sleep parameters, including awakenings, total wake time, wake after sleep onset and sleep efficiency, as well as a significant decrease in depressive symptomatology.

CONCLUSION

To summarise, the results of this study showed that the nurse-led sleep programme improved the sleep quality and reduced depressive symptomatology in cognitively intact nursing home residents. In this context, we can assert that interventions for sleep problems should be individualised by addressing sleep experience and sleep management strategies of older adults living in nursing homes and should be integrated with motivational interviewing techniques.

Effects of cognitive behavioral therapy for depression on improving insomnia and quality of life in Chinese women with breast cancer: results of a randomized, controlled, multicenter trial

PURPOSE

Cognitive behavioral therapy (CBT) for depression had been found to be effective in reducing depressive and anxiety symptoms in breast cancer survivors. It is not known whether CBT for depression would also improve insomnia and quality of life (QOL). The aim of this study was to investigate whether CBT for depression would improve insomnia and QOL in a randomized controlled multicenter trial.

PATIENTS AND METHODS

In this study, breast cancer survivors (n=392) were randomly allocated to the following three groups: CBT (n=98), self-care management (SCM, n=98), and usual care (UC, n=196) in a ratio of 1:1:2. CBT and SCM received a series of nine sessions for 12 weeks, whereas UC received UC only. Insomnia and QOL were evaluated using Athens Insomnia Scale (AIS) and Functional Assessment of Cancer Therapy-Breast (FACT-B) questionnaire at baseline, 4, 12, and 24 weeks.

RESULTS

There was a significant intergroup difference in AIS and FACT-B scores (both P<0.01). CBT showed less insomnia problems and better overall QOL compared with those in SCM and UC (both P<0.01). No significant differences were found between SCM and UC in insomnia problems and overall QOL. Moreover, the effects of CBT on insomnia and QOL were maintained during the follow-up period.

CONCLUSION

CBT for depression can be effective in improving insomnia problems and QOL in the Chinese breast cancer survivors.

Daytime sleepiness and sleep duration in long-term cancer survivors and non-cancer controls: results from a registry-based survey study

PURPOSE

Sleep-related complaints are common in cancer survivors. Although daytime sleepiness and sleep duration are associated with poor functional status, quality of life, and mortality in the general population, little is known about these issues in long-term cancer survivors. This study examined differences in daytime sleepiness and sleep duration between long-term cancer survivors and non-cancer controls.

METHODS

Survey data were analyzed from individuals diagnosed with cancer ≥2 years in the past (n = 1,171, mean age = 64.30, 80.8% white, 22.8% male) and spouse/friends controls (n = 250, mean age = 60.78, 88.0% white, 64.8% male). Daytime sleepiness was assessed using the Epworth Sleepiness Scale. Associations between sleep-related variables and history of cancer were estimated with multivariable logistic regression, adjusting for potential confounders. Stratified analyses were conducted to identify subgroups of survivors most at risk for sleep problems.

RESULTS

Cancer survivors were more likely than controls to report excessive daytime sleepiness (OR = 1.64, 95% CI: 1.07, 2.50). A cancer diagnosis was associated with longer sleep duration among males (OR = 1.25, 95% CI: 1.02, 1.53), but not in females (OR = 0.87, 95% CI: 0.37, 1.05). All other associations were similar regardless of cancer site, histology, time since diagnosis, treatment history, and history of multiple cancers.

CONCLUSIONS

Disturbances in daytime sleepiness and sleep duration persist among long-term cancer survivors and should be monitored in routine survivorship care. More research is needed to identify cancer survivors who are at increased risk for daytime sleepiness and disturbed sleep duration, as well as to identify causal mechanisms for, and interventions to mitigate, persistent differences.

Cognitive-behavioral therapy for insomnia in patients with cancer

Sleep-wake disturbances, particularly insomnia, are among the most prevalent and distressing symptoms experienced by patients with cancer. As a result of extensive interdisciplinary research conducted since 2000, cognitive-behavioral therapy now is considered the standard of care for the treatment of insomnia in the general population and also has been upgraded to "likely to be effective" in the Oncology Nursing Society Putting Evidence Into Practice weight of evidence category. Cognitive-behavioral therapy is a multicomponent psychological and behavioral treatment designed to eliminate the perpetuating factors of insomnia. The most frequently used strategies are stimulus control, sleep restriction and relaxation therapies, paradoxical intention, sleep hygiene, and cognitive restructuring. Although this insomnia treatment recommendation has been well publicized, the nursing literature has not effectively translated the theories and principles of cognitive-behavioral therapy into practical guidelines or considerations for use by oncology staff nurses and advanced practitioners. This article attempts to demystify cognitive-behavioral therapy and provide nurses at different levels of practice a foundation from which to evaluate and potentially deliver this promising insomnia intervention.

Children receiving treatment for cancer and their caregivers: a mixed methods study of their sleep characteristics

BACKGROUND

Sleep has a significant impact on the daily functioning of children and their parents. The purpose of this study was to describe and gain an understanding of the sleep characteristics of children receiving treatment for cancer and their caregivers using a mixed methods concurrent triangulation design.

PROCEDURE

Data were collected from questionnaires completed by 35 caregivers of children receiving treatment for cancer and compared to similar data from 64 caregivers of healthy children.

RESULTS

There was considerable variability in the sleep characteristics of the children receiving treatment for cancer as reported by their caregivers. However, as a group, the magnitude of their sleep problems, particularly among the adolescents, was significantly greater than that of the comparison group and had the potential to impact negatively on their participation in everyday life. They had poorer sleep efficiency. Many impairments, particularly pain, nightmares, and symptoms associated with steroid administration, impacted their sleep. Their caregivers also experienced an increased prevalence of sleep issues, which impacted their daytime functioning. Suggestions to prevent and treat the sleep issues of children receiving treatment for cancer focused on practicing good sleep habits, ensuring a safe, secure, and comfortable sleep environment, and using non-pharmaceutical and pharmaceutical interventions to address impairments interfering with sleep. Caregivers noted that it was important to take care of themselves by getting sufficient sleep and accepting help from others.

CONCLUSIONS

Sleep issues are prevalent in families of children receiving treatment for cancer and should be assessed routinely and addressed.

Prevalence, severity, and correlates of sleep-wake disturbances in long-term breast cancer survivors

CONTEXT

Current evidence shows that sleep-wake disturbances are a persistent problem linked to poor quality of life in women surviving breast cancer. Information regarding correlates of sleep-wake disturbances in long-term survivors is sparse.

OBJECTIVES

The objective of this study was to refine knowledge regarding prevalence, severity, and correlates of sleep-wake disturbances in long-term breast cancer survivors (BCS) compared with age-matched women without breast cancer (WWC).

METHODS

The cross-sectional convenience sample included 246 BCS and 246 WWC who completed a quality-of-life study and were matched within +/-5 years of age.

RESULTS

BCS were a mean of 5.6 years beyond completion of cancer treatment (range = 5.6-10.0 years). Based on Pittsburgh Sleep Quality Index (PSQI) scores, BCS had significantly more prevalent sleep-wake disturbances (65%) compared with WWC (55%) (P < 0.05). BCS also had significantly higher PSQI global scores indicating poorer sleep quality compared with WWC (P < 0.05). Significant correlates of prevalence of poor sleep for BCS included hot flashes, poor physical functioning, depressive symptoms, and distress, and for WWC, these included hot flashes, poor physical functioning, and depressive symptoms. Significant correlates (P < 0.05) of severity of poor sleep for BCS included presence of noncancer comorbidities, hot flashes, depressive symptoms, and residual effects of cancer treatment. For WWC, these included hot flashes, poor physical functioning, depressive symptoms, and impact of a life event.

CONCLUSION

Knowledge of prevalence, severity, and correlates of sleep-wake disturbances provides useful information to health care providers during clinical evaluations for treatment of sleep-wake disturbances in BCS.