Response shift in self-rated health after serious health events in old age

Measuring generic health using the minimum european health module: does it work and is it better than self-rated health?

BACKGROUND

Health is a fundamental aspect of many scientific disciplines and its definition and measurement is the analytical core of many empirical studies. Comprehensive measures of health, however, are typically precluded in survey research due to financial and temporal restrictions. Self-rated health (SRH) as a single indicator of health, on the other hand, exhibits a lack of measurement invariance by age and is biased due to non-health influences. In the three-item Minimum European Health Module (MEHM), SRH is complemented with questions on chronic health conditions and activity limitations, thus providing a compromise between single indicators and comprehensive measures.

METHODS

Using data from the German Ageing Survey (2008 & 2014; n = 12,037), I investigated the feasibility to combine the MEHM into a generic health indicator and judged its utility in comparison to SRH as a benchmark. Additionally, I explored the option of an extended version of the MEHM by adding information on multimorbidity and the presence and intensity of chronic pain.

RESULTS

The analyses showed that both versions of the MEHM had a good internal consistency and each represented a single latent variable that can be computed using generalized structural equation modeling. The utility of this approach showed great promise as it significantly reduced age-specific reporting behavior and some non-health biases present in SRH.

CONCLUSIONS

Using the MEHM to measure generic (physical) health is a promising approach with a wide array of applications. Further research could extend these analyses to additional age groups, other countries, and establish standardized weights for greater comparability.

Predicting global QoL after orthotopic neobladder or ileal conduit diversion: nomogram development

Introduction

Quality of life (QoL) outcomes in patients undergoing radical cystectomy (RC) with orthotopic neobladder (ONB) or ileal conduit (IC) have been extensively investigated. However, a general lack of consensus on QoL's predictive factors exists. The aim of the study was to develop a nomogram using preoperative parameters to predict global QoL outcome in patients with localized muscle-invasive bladder cancer (MIBC) undergoing RC with ONB or IC urinary diversion (UD).

Methods

A cohort of 319 patients who underwent RC and ONB or IC were retrospectively enrolled. Multivariable linear regression analyses were used to predict the global QoL score of the European Organisation for Research and Treatment of Cancer Quality of Life Core Questionnaire (EORTC QLQ-C30), according to the patient characteristics and UD. A nomogram was developed and internally validated.

Results

Patients' data in the two study groups significantly differed with regard to comorbidity profiles (chronic cardiac failure, p < 0.001; chronic kidney disease, p < 0.01; hypertension, p < 0.03; diabetic disease, p = 0.02; chronic arthritis, p = 0.02). A multivariable model that included patient age at surgery, UD, chronic cardiac disease, and peripheral vascular disease represented the basis for the nomogram. The calibration plot of the prediction model showed a systematic overestimation of the predicted global QoL score over the observed scores, with a slight underestimation for observed global QoL scores between 57 and 72. After performing leave-one-out cross-validation, the root mean square error (RMSE) emerged as 24.0.

Discussion/conclusion

A novel nomogram based completely on known preoperative factors was developed for patients with MIBC undergoing RC to predict a mid-term QoL outcome.

The relationship between pre-surgery self-rated health and changes in functional and mental health in older adults: insights from a prospective observational study

BACKGROUND

Elective surgeries are among the most common health stressors in later life and put a significant risk at functional and mental health, making them an important target of research into healthy aging and physical resilience. Large-scale longitudinal research mostly conducted in non-clinical samples provided support of the predictive value of self-rated health (SRH) for both functional and mental health. Thus, SRH may have the potential to predict favorable adaptation processes after significant health stressors, that is, physical resilience. So far, a study examining the interplay between SRH, functional and mental health and their relative importance for health changes in the context of health stressors was missing. The present study aimed at addressing this gap.

METHODS

We used prospective data of 1,580 inpatients (794 complete cases) aged 70 years or older of the PAWEL study, collected between October 2017 and May 2019 in Germany. Our analyses were based on SRH, functional health (Barthel Index) and self-reported mental health problems (PHQ-4) before and 12 months after major elective surgery. To examine changes and interrelationships in these health indicators, bivariate latent change score (BLCS) models were applied.

RESULTS

Our analyses provided evidence for improvements of SRH, functional and mental health from pre-to-post surgery. BLCS models based on complete cases and the total sample pointed to a complex interplay of SRH, functional health and mental health with bidirectional coupling effects. Better pre-surgery SRH was associated with improvements in functional and mental health, and better pre-surgery functional health and mental health were associated with improvements in SRH from pre-to-post surgery. Effects of pre-surgery SRH on changes in functional health were smaller than those of functional health on changes in SRH.

CONCLUSIONS

Meaningful changes of SRH, functional and mental health and their interplay could be depicted for the first time in a clinical setting. Our findings provide preliminary support for SRH as a physical resilience factor being associated with improvements in other health indicators after health stressors. Longitudinal studies with more timepoints are needed to fully understand the predictive value of SRH for multidimensional health.

TRIAL REGISTRATION

PAWEL study, German Clinical Trials Register, number DRKS00013311. Registered 10 November 2017 - Retrospectively registered, https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00013311 .

Rating Health and Rating Change: How Canadians Rate Their Health and Its Changes

Objectives: We investigated the contribution of five health domains to self-rated health (SRH) cross-sectionally and longitudinally and whether these contributions differ by gender or age. Methods: Employing dominance analyses, we quantified the contributions of functioning, diseases, pain, mental health, and behavior to both SRH at a point in time and for changes in SRH using data from the Canadian National Population Health Survey (NPHS, 1994-2011). Results: Cross-sectionally and longitudinally, functioning was the most important health domain, followed by diseases and pain. There were no meaningful differences in the ranking by gender while functioning, diseases, and pain were more relevant in older cohorts. Discussion: Functioning, diseases, and pain systematically were the most important health domains in both cross-sectional and longitudinal analyses. While these results held for women and men, they were more salient for older adults. This points to a gender-invariant but age-graded process, confirming previous research with European data.

Validation of the PROMIS-29v2 Health-Related Quality-of-Life Questionnaire in Patients With Coronary Heart Disease Participating in Remote Cardiac Rehabilitation

PURPOSE

The aim of this study was to validate the 29-item Patient-Reported Outcomes Measurement Information System version 2.0 (PROMIS-29v2) health-related quality-of-life (HRQL) questionnaire for use in patients with coronary heart disease (CHD) participating in remotely delivered cardiac rehabilitation (CR).

METHODS

Patients commencing remote CR across four sites in New South Wales, Australia, answered the PROMIS-29v2 and 12-item Short Form Health Survey version 2.0 (SF-12v2) questionnaires at CR entry and completion (6 wk). The data were analyzed for validity, reliability, and responsiveness to change.

RESULTS

Patients (N = 89) had a mean age of 66.9 ± 9.3 yr; 83% were male and were referred to CR for elective percutaneous coronary intervention (PCI) (42%), myocardial infarction (36%), and coronary artery bypass grafting (22%). Internal consistency reliability was adequate, with the Cronbach α ranging from 0.78-0.98. Convergent validity between the PROMIS-29v2 and SF-12v2 summary scores showed significantly strong correlations for physical (r = 0.62) and moderate for mental (r = 0.36) health. Discriminant validity was confirmed for sex (women reported lower physical and mental health) and referral diagnosis (patients who had elective PCI reported better physical health). Effect size (ES) comparisons confirmed responsiveness to change from CR entry to completion in physical health (ES = 0.51) and demonstrated evidence of more responsiveness than SF-12v2 for mental health (ES = 0.70).

CONCLUSION

The PROMIS-29v2 is reliable, valid, and responsive to changes in patients with CHD attending remotely delivered CR and allows for baseline HRQL assessment, between-diagnosis comparisons, and evaluation of changes over time.

Relationship between self-assessed health and life satisfaction in older adults: the moderating role of ego-resiliency

The present study was focused on the relationship between the subjective assessment of physical health and satisfaction with life (SWL) in older adults. The relationship itself was found in previous studies, but we postulated that it is moderated by ego-resiliency (ER). To verify this hypothesis, 124 Polish participants aged between 60 and 89 (mean = 71.72, standard deviation = 7.08) were asked to complete questionnaire measures of: self-assessed health (SAH; measured with seven items from the World Health Organization Quality of Life WHOQOL-BREF assessment), SWL (measured with the Satisfaction with Life Scale) and ER (measured with the Ego-Resiliency Scale ER89). The results confirmed the moderating role of ER by showing that the relationship between SAH and SWL was statistically significant only when ER was high or moderate, while there was no relationship for participants with low ER. To interpret these results, we postulate that ego-resilient older adults are more accurate in the assessment of health, i.e. their SAH reflects the objective condition more closely, which strengthens the relationship between SAH and wellbeing. ER is thus conceived as an important psychological resource that promotes the accuracy of SAH and, consequently, makes it a more robust predictor of SWL. We hypothesise that this is based on the positive relationship between ER and wisdom in older adults.

Longitudinal validity of self-rated health: the presence and impact of response shift

Objective: This paper aimed to examine the longitudinal validity of self-rated health (SRH) and whether it would be affected by possible changes in evaluation standards (i.e., response shift) over time.Design: Data are from a longitudinal survey of a nationally representative sample in China. Analytical sample was restricted to respondents aged 45 and above (n = 15,893). Individual fixed effects models were used to analyze changes in ratings on health anchoring vignettes and self-rated health over time.Main outcome measures: SRH at two time points with a -two-year span.Results: Both SRH and anchoring vignettes ratings displayed changes over a two-year span for all the studied age groups. Compared with the self-assessed change in health ("How would you rate your health as compared to that of last year?"), changes in SRH reported over time displayed a more stable and optimistic pattern. SRH responded to doctor diagnosed chronic disease and changes in functional limitation, before and after adjusting for evaluation standards.Conclusion: SRH is responsive to the newly diagnosed chronic disease and functional limitation, regardless of whether we consider response shift within the same respondents over time.

Self-reported health and life satisfaction in older emergency department patients: sociodemographic, disease-related and care-specific associated factors

BACKGROUND

Self-reported health (SRH) and life satisfaction (LS) are patient-reported outcomes (PROs) that independently predict mortality and morbidity in older adults. Emergency department (ED) visits due to serious health problems or accidents might pose critical life events for patients. This study aimed (a) to characterize older patients' SRH and LS during the distinct event of an ED stay, and (b) to analyze concomitant associations of PROs with ED patients' sociodemographic, disease-specific and care-related variables.

METHODS

Study personnel recruited mostly older ED patients from three disease groups during a two-year period (2017-2019) in eight EDs in central Berlin, Germany, in the context of the health services research network EMANet. Cross-sectional data from the baseline patient survey and associated secondary data from hospital information systems were analyzed. Multilevel linear regression models with random intercept were applied to assess concomitant associations with SRH (scale: 0 (worst) to 100 (best)) and LS (scale: 0 (not at all satisfied) to 10 (completely satisfied)) as outcomes, including sensitivity analyses.

RESULTS

The final sample comprised N = 1435 participants. Mean age was 65.18 (SD: 16.72) and 50.9% were male. Mean ratings of SRH were 50.10 (SD: 23.62) while mean LS scores amounted to 7.15 (SD: 2.50). Better SRH and higher LS were found in patients with cardiac symptoms (SRH: β = 4.35, p = .036; LS: β = 0.53, p = .006). Worse SRH and lower LS were associated with being in need of nursing care (SRH: β = - 7.52, p < .001; LS: β = - 0.59, p = .003) and being unemployed (SRH: β = - 8.54, p = .002; LS: β = - 1.27, p < .001). Sex, age, number of close social contacts, and hospital stays in the previous 6 months were additionally related to the outcomes. Sensitivity analyses largely supported results of the main sample.

CONCLUSIONS

SRH and LS were associated with different sociodemographic and disease-related variables in older ED patients. Nursing care dependency and unemployment emerged as significant factors relating to both outcomes. Being able to identify especially vulnerable patients in the ED setting might facilitate patient-centered care and prevent negative health outcomes. However, further longitudinal research needs to analyze trajectories in both outcomes and suitable intervention possibilities in the ED setting.

TRIAL REGISTRATION

EMANet sub-studies were registered separately: German Clinical Trials Register (EMAAge: DRKS00014273, registration date: May 16, 2018; https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00014273; EMACROSS: DRKS00011930, registration date: April 25, 2017; https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00011930); ClinicalTrials.gov (EMASPOT: NCT03188861, registration date: June 16, 2017; https://clinicaltrials.gov/ct2/show/NCT03188861?term=NCT03188861&draw=2&rank=1).

Relationship between trajectories of post-stroke disability and self-rated health (NeuroAdapt): protocol for a prospective observational study

INTRODUCTION

Stroke is the leading neurological cause of adult long-term disability in Europe. Even though functional consequences directly related to neurological impairment are well studied, post-stroke trajectories of functional health according to the International Classification of Functioning, Disability and Health are poorly understood. Particularly, no study investigated the relationship between post-stroke trajectories of activities of daily living (ADL) and self-rated health (SRH). However, such knowledge is of major importance to identify patients at risk of unfavourable courses. This prospective observational study aims to investigate trajectories of ADL and SRH, and their modifying factors in the course of the first year after stroke.

METHODS AND ANALYSIS

The study will consecutively enrol 300 patients admitted to a tertiary care hospital with acute ischaemic stroke or transient ischaemic attack (TIA; Age, Blood Pressure, Clinical Features, Duration of symptoms, Diabetes score ≥3). Patient inclusion is planned from May 2021 to September 2022. All participants will complete an interview assessing ADL, SRH, mental health, views on ageing and resilience-related concepts. Participants will be interviewed face-to-face 1-5 days post-stroke/TIA in the hospital; and will be followed up after 6 weeks, 3 months, 6 months and 12 months via telephone. The 12-month follow-up will also include a neurological assessment. Primary endpoints are ADL operationalised by modified Rankin Scale scores and SRH. Secondary outcomes are further measures of ADL, functional health, physical activity, falls and fatigue. Views on ageing, social support, resilience-related concepts, affect, frailty, illness perceptions and loneliness will be examined as modifying factors. Analyses will investigate the bidirectional relationship between SRH and ADL using bivariate latent change score models.

ETHICS AND DISSEMINATION

The study has been approved by the institutional review board of the University Medicine Greifswald (Ref. BB 237/20). The results will be disseminated through scientific publications, conferences and media. Moreover, study results and potential implications will be discussed with patient representatives.

TRIAL REGISTRATION NUMBER

NCT04704635.

Quality of life preferences in colorectal cancer patients aged 80 and over

BACKGROUND

Management of patients with colorectal cancer (CRC) is about not only survival, but also quality of life (QoL). What patients want is important but is not well researched or understood for elderly patients where it is very relevant. This study aimed to measure and compare what patients with CRC aged 80 and over and surgeons consider important in terms of survivorship after surgery for CRC.

METHODS

Patients aged 80 and over who were having surgery for CRC were recruited and interviewed using closed and open questions about their expectations of surgery and various QoL dimensions. These were assessed preoperatively and 3 months post-operatively. Surgeons ranked the same QoL dimensions of patients by questionnaire.

RESULTS

Nineteen patients (median age 87.5, range 80-95, eight males and 11 females) were recruited. Patients rated items relating to health, mobility and independence (n = 23) as top three items most often followed by people outside self (n = 13). Surgeons underestimated importance in 17 domains with the biggest discrepancy being in 'avoiding a stoma' (4.11 versus 2.3, P < 0.01).

CONCLUSION

With patients over 80 years having surgery for CRC, there is a lack of concordance between what surgeons think is important and what patients think is important. Despite this, CRC patients aged 80 and older are almost always satisfied with the outcome of surgery. Surgeons should ensure that they understand patients' expectations and that they are aligned with likely outcomes of surgery.

Changes in views on aging in later adulthood: the role of cardiovascular events

A number of longitudinal studies have pointed to the long-term impact of different views on aging (VoA) on health in later life, whereas the reverse relationship has rarely been examined. Serious cardiovascular events such as myocardial infarction or stroke are life-threatening events which might in turn lead to changes in VoA. The present longitudinal study examined the effect of a cardiovascular event (CVE) on VoA over a three-year period using pooled data from three waves of the German Ageing Survey (2008, 2011, 2014, age range: 40-95 years). In order to account for alternative explanations for changes in VoA, individuals without CVE (n = 200) were matched to individuals who experienced a CVE (n = 202) using a propensity score matching procedure. Compared to individuals without CVE, individuals who experienced a CVE showed adverse changes in three VoA indicators (self-perceptions of aging as associated with physical losses/with ongoing development; subjective age). These results suggest that CVE can in fact change how individuals view their own aging. According to previous studies, this can lead to future health changes and thus become a health-related downward spiral. Health promotion programs could, therefore, profit by adding specific VoA interventions for individuals who experienced a CVE.

The stability of care preferences following acute illness: a mixed methods prospective cohort study of frail older people

Background

Patient preferences are integral to person-centred care, but preference stability is poorly understood in older people, who may experience fluctuant illness trajectories with episodes of acute illness. We aimed to describe, and explore influences on the stability of care preferences in frail older people following recent acute illness.

Methods

Mixed-methods prospective cohort study with dominant qualitative component, parallel data collection and six-month follow up. Study population: age ≥ 65, Rockwood Clinical Frailty score ≥ 5, recent acute illness requiring acute assessment/hospitalisation. Participants rated the importance of six preferences (to extend life, improve quality of life, remain independent, be comfortable, support ‘those close to me’, and stay out of hospital) at baseline, 12 and 24 weeks using a 0–4 scale, and ranked the most important. A maximum-variation sub-sample additionally contributed serial in-depth qualitative interviews. We described preference stability using frequencies and proportions, and undertook thematic analysis to explore influences on preference stability.

Results

90/192 (45%) of potential participants consented. 82/90 (91%) answered the baseline questionnaire; median age 84, 63% female. Seventeen undertook qualitative interviews. Most participants consistently rated five of the six preferences as important (range 68–89%). ‘Extend life’ was rated important by fewer participants (32–43%). Importance ratings were stable in 61–86% of cases. The preference ranked most important was unstable in 82% of participants.

Preference stability was supported by five influences: the presence of family support; both positive or negative care experiences; preferences being concordant with underlying values; where there was slowness of recovery from illness; and when preferences linked to long term goals. Preference change was related to changes in health awareness, or life events; if preferences were specific to a particular context, or multiple concurrent preferences existed, these were also more liable to change.

Conclusions

Preferences were largely stable following acute illness. Stability was reinforced by care experiences and the presence of family support. Where preferences were unstable, this usually related to changing health awareness. Consideration of these influences during preference elicitation or advance care planning will support delivery of responsive care to meet preferences. Obtaining longer-term data across diverse ethnic groups is needed in future research.

What Factors Shape Self-Reported Health Among Community-Dwelling Older Adults? A Scoping Review

Self-reported health is a predictive measure of morbidity and mortality across populations. A comprehensive understanding of the factors that shape self-reported health among community-dwelling older adults, a growing population globally, is lacking. The aim of this review was to summarize the factors that are associated with self-reported health among this population and identify key areas for future research. Accordingly, we conducted a scoping review using the stage-wise framework developed by Arksey and O'Malley. We summarized 42 factors, as identified in 30 publications, and organized them into four categories. Key factors shaping self-reported health included the presence of chronic conditions and depressive symptoms. As the population of community-dwelling older adults continues to increase, there remains a need to understand how these identified factors shape self-reported health. To date, empirical research has been limited to observational and cross-sectional designs. There is a need to further explore these factors in longitudinal data.

Associations between self-rated health and the assessments of anchoring vignettes in cardiovascular patients

Background/Objective

Assessments of health can be biased by response shift effects. One method for detecting such effects is the use of anchoring vignettes. The aim of this study was to analyze the relationship between participants' self-assessed health state and their assessments of these vignettes.

Method

A total of 342 cardiovascular patients assessed their own state of health on a 0-100 visual analogue scale. The patients additionally assessed two vignettes featuring fictional persons suffering from specific complaints. A sample of the general population (N = 1,236) served as controls.

Results

The participants rated the health state of the vignette character featuring physical problems as being significantly better than the general population did (effect size: d = 0.53). The group difference in the assessment of the vignette featuring primarily mental health problems was lower (d = -0.17). Participants' assessments of the vignettes were positively correlated with their assessments of their own health state (r = .26 and r = .10) and with several quality of life variables.

Conclusions

Anchoring vignettes are a useful tool for detecting response shift effects.

Investigation of the Predictors of Self-rated Health of Economically Disadvantaged African American Men and Women: Evidence for Sponge Hypothesis

Background and aims

According to the sponge hypothesis, compared to men's self-rated health (SRH), women's SRH is more likely to reflect conditions other than chronic medical conditions (CMCs) such as psychiatric disorders (PDs). As a result, poor SRH is a weaker predictive factor for mortality risk for women than men. Most of this literature, however, is done in samples that are predominantly middleclass White. To test the sponge hypothesis among economically disadvantaged African Americans (AAs), this study compared low-income AA men and women for the effects of the number of PDs and CMCs on SRH.

Materials and Methods

This cross-sectional study recruited a non-random sample (n = 150) of economically disadvantaged AA adults with PD(s). Structured face-to-face interviews were used to collect data. SRH was measured using a single-item measure. PDs and CMCs were also self-reported. We applied linear regression models to test the interactions between SRH and the number of PDs and CMC as well as gender.

Results

The number of PDs and CMCs were associated with SRH in the pooled sample of low-income AA adults with PD(s). However, we found a significant interaction between the number of PDs and gender. This interaction suggested a stronger association between PDs and SRH for AA women than AA men. Gender did not alter the association between the number of CMCs and SRH.

Conclusion

The number of PDs is a determinant of SRH for low-income AA women but not AA men, supporting the sponge hypothesis.

Trajectories of self-rated health in an older general population and their determinants: the Lifelines Cohort Study

OBJECTIVES

Poor self-rated health (SRH) is a strong predictor of premature mortality in older adults. Trajectories of poor SRH are associated with multimorbidity and unhealthy behaviours. Whether trajectories of SRH are associated with deviating physiological markers is unclear. This study identified trajectories of SRH and investigated the associations of trajectory membership with chronic diseases, health risk behaviours and physiological markers in community-dwelling older adults.

STUDY DESIGN AND SETTING

Prospective general population cohort.

PARTICIPANTS

Trajectories of SRH over 5 years were identified using data of 11 600 participants aged 65 years and older of the Lifelines Cohort Study.

OUTCOME MEASURES

Trajectories of SRH were the main outcome. Covariates included demographics (age, gender, education), chronic diseases, health-risk behaviour (physical activity, smoking, drinking) and physiological markers (body mass index, cardiovascular function, lung function, glucose metabolism, haematological condition, endocrine function, renal function, liver function and cognitive function).

RESULTS

Four stable trajectories were identified, including excellent (n=607, 6%), good (n=2111, 19%), moderate (n=7677, 65%) and poor SRH (n=1205, 10%). Being women (OR: 1.4; 95% CI: 1.0 to 1.9), low education (OR: 2.1; 95% CI: 1.5 to 3.0), one (OR: 10.4; 95% CI: 7.4 to 14.7) or multiple chronic diseases (OR: 37.8; 95% CI: 22.4 to 71.8), smoking (OR: 1.8; 95% CI: 1.0 to 3.2), physical inactivity (OR: 3.1; 95% CI: 1.8 to 5.2), alcohol abstinence (OR: 2.2; 95% CI: 1.4 to 3.2) and deviating physiological markers (OR: 1.5; 95% CI: 1.1 to 2.0) increase the odds for a higher probability of poor SRH trajectory membership compared with excellent SRH trajectory membership.

CONCLUSION

SRH of community-dwelling older adults is stable over time with the majority (65%) having moderate SRH. Older adults with higher probabilities of poor SRH often have unfavourable health status.

Depression Fully Mediates the Effect of Multimorbidity on Self-Rated Health for Economically Disadvantaged African American Men but Not Women

Background. Although chronic medical conditions (CMCs), depression, and self-rated health (SRH) are associated, their associations may depend on race, ethnicity, gender, and their intersections. In predominantly White samples, SRH is shown to better reflect the risk of mortality and multimorbidity for men than it is for women, which suggests that poor SRH among women may be caused not only by CMCs, but also by conditions like depression and social relations-a phenomenon known as "the sponge hypothesis." However, little is known about gender differences in the links between multimorbidity, depression, and SRH among African Americans (AAs). Objective. To study whether depression differently mediates the association between multimorbidity and SRH for economically disadvantaged AA men and women. Methods. This survey was conducted in South Los Angeles between 2015 to 2018. A total number of 740 AA older adults (age ≥ 55 years) were enrolled in this study, of which 266 were AA men and 474 were AA women. The independent variable was the number of CMCs. The dependent variable was SRH. Age and socioeconomic status (educational attainment and marital status) were covariates. Depression was the mediator. Gender was the moderator. Structural Equation Modeling (SEM) was used to analyze the data. Results. In the pooled sample that included both genders, depression partially mediated the effect of multimorbidity on SRH. In gender specific models, depression fully mediated the effects of multimorbidity on SRH for AA men but not AA women. For AA women but not AA men, social isolation was associated with depression. Conclusion. Gender differences exist in the role of depression as an underlying mechanism behind the effect of multimorbidity on the SRH of economically disadvantaged AA older adults. For AA men, depression may be the reason people with multimorbidity report worse SRH. For AA women, depression is only one of the many reasons individuals with multiple CMCs report poor SRH. Prevention of depression may differently influence the SRH of low-income AA men and women with multimorbidity.

The disease burden of Multiple Sclerosis from the individual and population perspective: Which symptoms matter most?

BACKGROUND

MS symptoms affect many functional domains. Knowing the specific impact of symptoms on health-related quality of life (HRQoL) is vital for successful disease and symptom management in MS. We aimed at investigating how specific MS symptoms contribute to the disease burden in individuals and from a population perspective.

METHODS

We included 855 Swiss Multiple Sclerosis Registry participants with a relapsing-remitting form (RRMS) or a progressive form (PMS). HRQoL was measured with the EuroQol 5-Dimension EQ-5D-index and EQ-Visual Analogue Scale (EQ-VAS) on 0-100% scales. Their associations with 20 symptoms, socio-demographic and clinical information were explored in median regression models, stratified by RRMS and PMS.

RESULTS

We included 611 participants with RRMS and 244 with PMS. In RRMS, gait (-6.5%) and balance problems (-5.1%) had the largest EQ-5D-index reductions, and were also important at the population level (frequencies 45% and 52%). Fatigue, depression, and spasticity (frequencies 74.1%, 31%, 38%) also contributed to the population disease burden. In PMS, spasticity, paralysis, and bowel problems had the largest impact on EQ-5D-index, both at the individual and population levels. The largest impact on EQ-VAS at population level was associated in RRMS with balance problems, depression, dizziness, and spasticity, while in PMS with weakness, pain, and paralysis.

CONCLUSIONS

While HRQoL at population level is most affected by balance problems, spasticity, and depression in RRMS, the biggest HRQoL losses in PMS are caused by spasticity, paralysis, weakness, and pain. Many symptoms with the largest effects in individuals substantially contribute to the population disease burden.