Sleep pattern and spectral analysis of caregiver-mothers of sons with Duchenne muscular dystrophy, and an examination of differences between carriers and non-carriers

Measuring carer quality of life in Duchenne muscular dystrophy: a systematic review of the reliability and validity of self-report instruments using COSMIN

Introduction

Duchenne muscular dystrophy is a rare, progressive, life-limiting genetic neuromuscular condition that significantly impacts the quality of life of informal caregivers. Carer quality of life is measured using heterogeneous self-report scales, yet their suitability for Duchenne remains unclear. This review aimed to identify and evaluate the reliability and validity of quality of life instruments in Duchenne carers.

Materials and methods

Systematic searches were conducted in Embase, MEDLINE, CINAHL, PsycINFO, Cochrane Library and Google Scholar. Full research articles reporting data on multiple-item self-report quality of life instruments in informal Duchenne carers were included. Extracted evidence was qualitatively synthesised and evaluated, including risk of bias, against the Consensus-based Standards for the selection of health Measurement Instruments. Duchenne carer collaborators (N = 17) helped rate the instruments’ content validity.

Results

Thirty-one articles featuring thirty-two quality of life instruments were included. Content validity was rated as “inconsistent” based on very low quality evidence. For Duchenne carer collaborators, the best instrument was PedsQL Family Impact Module. Only one instrument had evidence for structural validity (rated “unsatisfactory”) and measurement invariance (rated “satisfactory”). Instruments received “satisfactory” ratings for internal consistency and mixed ratings for construct validity and responsiveness. There was no evidence for reliability, measurement error, or criterion validity.

Discussion

Instruments used to measure Duchenne carer quality of life have limited and often inconsistent supportive psychometric evidence. Further work must investigate instruments’ measurement properties in Duchenne carers and/or the development of new tools. In the interim, we recommend considering the PedsQL Family Impact Module based on Duchenne carer ratings.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12955-022-01964-4.

Interplay of disability, caregiver impact, and out-of-pocket expenditures in Duchenne muscular dystrophy: a cohort study

Background

Providing caregiving support to people with Duchenne muscular dystrophy (DMD) is challenging, beginning in early childhood, and continuing through the progression of multidimensional disability. This study addressed the interplay between caregiver impact, out-of-pocket expenditures, and DMD disability. To examine these interconnections, we investigated the association between caregiver impact domains and out-of-pocket expenditures; and the presence of clusters in caregivers on the basis of DMD-related disability domains in the patients for whom they provided caregiving support.

Methods

This web-based study recruited 566 DMD caregivers (140 males, 426 females; mean age 41.6 years, SD 8.8, range 21–72), examining caregiver impact using the DMD Caregiver Impact Measure, PROMIS-derived parent-proxy (PPP) measures of their child’s disability, and items tapping out-of-pocket expenditures related to home and vehicle accommodations and assistive devices. T-tests compared caregiver impact scores by out-of-pocket expenditures incurred. Latent Profile Analyses (LPA) were conducted to generate impact profiles related to child’s disability as reported by caregiver proxies.

Results

Higher out-of-pocket expenditures were generally associated with worse impact on the subscales, but several expenditures (e.g., kitchen, bathroom, scooter) were associated with lower impact. LPA indicated that the four-group solution provided the best relative fit and yielded good profile separation (entropy = 0.91). Caregivers with lowest impact reported the highest mobility, cognitive, and upper extremity functioning of their DMD care recipients, whereas the highest caregiver impact was driven by their care recipient’s negative affect and fatigue. The upper-middle impact group showed great variability in proxy-disability domains, whereas the lower-middle group had similar levels of disability across domains. Profiles were represented across all child ages.

Conclusion

Out-of-pocket expenditures were often associated with worse caregiver impact, but some associated with milder impact (i.e., bathroom or kitchen modification, investing in a ceiling lift or medical scooter). While their son’s level of disability and age were related to impact on the DMD caregiver, the domains giving rise to highest caregiver impact were not the most visible aspects of disability, such as mobility, but rather negative affect and fatigue. Other contextual attributes are likely implicated, and will be addressed in the companion paper.

Supplementary Information

The online version contains supplementary material available at 10.1186/s41687-022-00425-2.

Comparing contributors of parental sleep health in families with and without a child with Duchenne muscular dystrophy

BACKGROUND

The sleep health of caregivers of children with Duchenne muscular dystrophy (DMD) is often overlooked in clinical practice and research. This study characterizes the sleep health of caregivers of children with DMD (4-17 years) compared to parents of age-matched, unaffected children. We explore potential contributors to parental sleep efficiency and hypothesize that child awakenings will have a considerable influence on parental sleep efficiency.

METHODS

In this observational study, parents and their children were asked to wear the ActiGraph GT9X Link at night for 1 month. From these data, actigraphy variables (eg, percent sleep efficiency, nocturnal awakenings) were calculated and averaged for parents and children. We also used the Pittsburgh Sleep Quality Index (PSQI) to measure subjective sleep quality.

MAIN FINDINGS

Parents in the DMD group (n = 25, M = 84.5%) had significantly worse sleep efficiency compared to controls (n = 15, M = 87.8%, p = .048). This difference was sustained after controlling for parent age, child age, and average child awakenings (F(4, 23) = 2.68, p= .057, R² = .32). Additionally, more parents in the DMD group scored as "poor sleepers" on the PSQI (above 5, 50%) compared to controls (23%), suggesting a strong, yet not statistically significant association between subjective poor sleep and group (χ²(1) = 2.47, p = .116, OR = 3.33).

CONCLUSION

Parents of children with DMD exhibit both objective and subjective differences suggesting their sleep is impaired. Interestingly, these sleep concerns are not significantly explained by child awakenings as hypothesized. Future research is needed to fully understand the prevalence and cause of poor sleep in a larger group of DMD caregivers as well as direct care for caregivers of children with disabilities.

Characterizing the quality-of-life impact of Duchenne muscular dystrophy on caregivers: a case-control investigation

Background

This study examined the impact of Duchenne muscular dystrophy (DMD) on family-member caregivers in terms of quality of life, life stress, and indirect costs, as compared to a stratified comparison group of parents of similar-age children without DMD.

Methods

A web-based survey included DMD caregivers and a nationally representative comparison group of parents of children without DMD stratified by Child Age Group. Outcomes included quality of life, resilience, caregiver impact, stressful life events, financial strain, out-of-pocket expenditures, work productivity and unrealized ambitions. General linear models assessed the main effect of Caregiver Group and the interaction of Caregiver Group with Child-Age-Group, after adjusting for demographic covariates.

Results

Compared to parents without a DMD child, DMD Caregivers reported better physical health but worse mental health, positive affect/well-being, environmental mastery, difficulty paying bills, and more hours missed from work. Providing caregiving support for DMD teenagers was the most challenging. DMD caregivers curtailed their educational and professional ambitions, and modified their homes to accommodate the disability associated with DMD. Their non-DMD children had to make sacrifices as well. Nonetheless, in resilience and life stress, DMD caregivers were comparable to the comparison group, and showed consistent levels of positive emotions across the age of their DMD child.

Conclusion

DMD caregivers fared worse on most outcomes and faced more hurdles in work life. They face constraints and hidden costs that impact their health and financial well-being. Caregivers of teenagers with DMD reported higher impact. Nonetheless, parents of DMD children of all ages maintained notable resilience and positivity.

Supplementary Information

The online version contains supplementary material available at 10.1186/s41687-021-00386-y.

A Novel Microwave Treatment for Sleep Disorders and Classification of Sleep Stages Using Multi-Scale Entropy

The aim of this study was to develop an integrated system of non-contact sleep stage detection and sleep disorder treatment for health monitoring. Hence, a method of brain activity detection based on microwave scattering technology instead of scalp electroencephalogram was developed to evaluate the sleep stage. First, microwaves at a specific frequency were used to penetrate the functional sites of the brain in patients with sleep disorders to change the firing frequency of the activated areas of the brain and analyze and evaluate statistically the effects on sleep improvement. Then, a wavelet packet algorithm was used to decompose the microwave transmission signal, the refined composite multiscale sample entropy, the refined composite multiscale fluctuation-based dispersion entropy and multivariate multiscale weighted permutation entropy were obtained as features from the wavelet packet coefficient. Finally, the mutual information-principal component analysis feature selection method was used to optimize the feature set and random forest was used to classify and evaluate the sleep stage. The results show that after four times of microwave modulation treatment, sleep efficiency improved continuously, the overall maintenance was above 80%, and the insomnia rate was reduced gradually. The overall classification accuracy of the four sleep stages was 86.4%. The results indicate that the microwaves with a certain frequency can treat sleep disorders and detect abnormal brain activity. Therefore, the microwave scattering method is of great significance in the development of a new brain disease treatment, diagnosis and clinical application system.

Duchenne muscular dystrophy and caregiver burden: a systematic review

AIM

To conduct a systematic literature review of caregiver burden in Duchenne muscular dystrophy (DMD).

METHOD

We searched Embase, Web of Science, and PubMed for full-text articles reporting results from studies of caregiver burden in DMD.

RESULTS

We identified 483 unique publications. Of these, 450 were excluded after title and abstract screening, and 12 after full-text review. A total of 21 articles were included for data synthesis. Results encompassing more than 15 aspects of caregiver burden, investigated through surveys and/or interviews across 15 countries, were identified in the literature. Caregiving in DMD was frequently associated with impaired health-related quality of life, poor sleep quality, reduced family function, depression, pain, stress, sexual dysfunction, and/or lower self-esteem, as well as a considerable impact on work life and productivity.

INTERPRETATION

Providing informal care to a patient with DMD can be associated with a substantial burden. Yet, more research is needed to better understand the clinical implications of caregiving in DMD and the relationship between caregiver burden and the progression of the disease. Our data synthesis should be helpful in informing clinical and social support programmes directed to families caring for a patient with DMD.

WHAT THIS PAPER ADDS

A substantial body of evidence describes caregiver burden in Duchenne muscular dystrophy. Little is known of the family burden beyond caregivers' self-assessments.