Disentangling the complex relation of disability and depressive symptoms in old age - findings of a multicenter prospective cohort study in Germany

Bidirectional, longitudinal associations between depressive symptoms and IADL/ADL disability in older adults in China: a national cohort study

INTRODUCTION

Based on the data from the China Health and Retirement longitudinal study (CHARLS), we aimed to investigate the bidirectional relationship between depressive symptoms and functional disability.

METHODS

Data were collected across 3 waves from 2013 to 2018. The activities of daily living (ADLs) and the instrumental activities of daily living (IADLs) scales were used to measure functional disability and the CESD-10 was used to measure depressive symptoms. Cross-lagged models were performed to examine cross effect between depressive symptoms and functional disability across three waves.

RESULTS

Data on 10,092(mean [SD] age, 61.98[8.44] years; 3764 females [37.30%]) and 10,180 participants (mean [SD] age, 62.01[8.46] years; 3788 females [37.21%]) in IADL sample and ADL sample were included in the analyses. For IADL disability, the cross-lagged model shows a bidirectional association across three waves; the multivariable GEE model revealed that changes in CESD-10 score across waves were associated with worse IADL disability (β ranges: 0.08-0.10) and vice versa, worsen of IADL disability ascending developing of CESD-10 score (β ranges: 0.09-0.10). For ADL disability, the cross-lagged model shows a bidirectional association across three waves; the multivariable GEE model revealed that changes of CESD-10 score across waves were associated with worse IADL disability (β ranges: 0.08-0.10) and vice versa, worsen of IADL disability ascending developing of CESD-10 score (β ranges: 0.09-0.10).

DISCUSSION

Study findings underscore a significant bidirectional between depressive symptoms and functional disability in older adults. Thus, simultaneous intervention should be taken to manage the mutual development of functional disability and depression.

Depressive symptoms and associated factors among older patients with arthritis: evidence from a community-based study in eastern China

Introduction

Depressive symptoms are often experienced by patients with arthritis and are correlated with poor health outcomes. However, the association between depressive symptoms and multidimensional factors (sociodemographic characteristics, health conditions, health behaviors, and social support) among older patients with arthritis in China remains poorly understood. This study aimed to explore the prevalence of depressive symptoms in older patients with arthritis in eastern China and identify the associated factors.

Methods

We analyzed data of 1,081 older patients with arthritis using secondary data from 2014 to 2020 from a community-based ongoing study initiated in 2014 in eastern China. The prevalence of depressive symptoms was calculated, and univariate and multilevel logistic regression analyses were used to identify the associated factors.

Results

The mean age of older patients with arthritis was 69.16 ± 7.13 years; 42.92% were men and 57.08% were women. The prevalence of depressive symptoms in older patients with arthritis was 14.99% (95% confidence interval: 12.91-17.26%), about 1.8 times higher than that in older adults without arthritis (8.49%, p < 0.001). Multilevel logistic regression identified perception of poor economic status (odds ratio [OR] = 5.52, p < 0.001), multimorbidity (OR = 1.96, p = 0.001), limitations in activities of daily living (OR = 2.36, p = 0.004), and living alone (OR = 3.13, p = 0.026) as factors positively associated with depressive symptoms. Patients diagnosed with arthritis at an older age had lower odds of experiencing depressive symptoms (OR = 0.67, p = 0.046).

Conclusion

Screening for depressive symptoms is essential among older patients with arthritis, especially those who perceive themselves as having a poor economic status, are diagnosed at an earlier age, have multimorbidity, have limitations in activities of daily living, and live alone. The associations of age at arthritis diagnosis and dietary behaviors with depressive symptoms require further research.

The association between functional disability and depressive symptoms among older adults: Findings from the China Health and Retirement Longitudinal Study (CHARLS)

BACKGROUND

Previous research has shown that depressive symptoms in older adults was associated with functional disability, including basic activities of daily living (BADLs) and instrumental activities of daily living (IADLs). However, little is known about the impact of different patterns of functional disability and new-onset functional disability on subsequent depressive symptoms.

OBJECTIVE

To determine the effect of various patterns of functional disability and new-onset functional disability on depressive symptoms among Chinese older adults aged 60 years and above.

METHOD

The study included 3242 older adults from the China Health and Retirement Longitudinal Study (CHARLS), which was conducted from 2011 to 2018. Cox proportional hazards models were used to investigate the associations between patterns of functional disability and depressive symptoms. The associations were also examined in the population with new-onset functional disability.

RESULT

During 15,321 person-years of follow-up, 946 depressive symptoms occurred. The hazard ratios (HRs) of depressive symptoms were 1.29 (95 % confidence intervals [CI]: 1.05-1.58) for IADLs disability, 1.22 (95 % CI: 0.75-1.55) for BADLs disability, and 1.78 (95 % CI: 1.41-2.22) for both IADLs and BADLs disabilities. In the analysis of new-onset functional disability, the HRs were 1.50 (95 % CI: 1.06-2.13) for onset IADLs disability, 1.28 (95 % CI: 0.85-1.91) for onset BADLs disability, and 1.69 (95 % CI: 1.03-2.76) for both onset BADLs and IADLs disabilities.

LIMITATIONS

Depressive symptoms were assessed using the Centre for Epidemiological Studies Depression Scale, which has limitations in diagnosing clinical depression.

CONCLUSION

Functional disability increases the risk of depressive symptoms, particularly impaired IADLs function. Psychological care for older adults with functional disability should be strengthened.

The effect of internet use on depressive symptoms in middle-aged and older adults with functional disability: the mediating role of social isolation

Objective

The popularization of the internet provides the possibility to improve the depressive symptoms (DS) and social isolation of middle-aged and older adults with functional disability. There was a significant correlation between internet use and DS in middle-aged and older adults with functional disability, but the relationship between internet use, social isolation, and DS remains to be confirmed.

Methods

Data were obtained from 7,955 middle-aged and older adults aged 45 years and older from the 2018 China Health and Retirement Longitudinal Study (CHARLS). Multiple linear regression models were used to analyze the association between internet use and DS, and the Sobel test was used to explore mediating models.

Results

Results showed that internet use was negatively associated with DS among Chinese middle-aged and older adults. Among them, social needs (B = -0.770, p = 0.041), and information reception (B = -1.067, p = 0.007) were significantly related to DS in middle-aged and older adults. Only information reception (B = -3.161, p = 0.031) was significantly related to DS among middle-aged and older adults with functional disability. Social isolation partially mediated the association between internet use and DS in middle-aged and older adults without functional disability, whereas it was fully mediated in middle-aged and older adults with functional disability.

Conclusion

This study indicates that when formulating health policies to promote the mental health of Chinese middle-aged and older adults, the use of the internet should not be overlooked.

The Mediating Role of Depression in Association Between Total Sleep Time and Instrumental Activities of Daily Living in China

Objectives: This study aims to investigate the mediating role of depression and the moderating effect of gender in the relationship between total sleep time (TST) and instrumental activities of daily living (IADL) in middle-aged and elderly people (aged 45 or above). Methods: The data used in this study is from the China Health and Retirement Longitudinal Study (CHARLS), including a total of 10,460 respondents. Associations between TST, IADL, depression, and gender were analyzed using logistic regression and Karlson, Holm, and Breen (KHB) methods. Results: Short (OR = 1.42, 95% CI = 1.28-1.58 of ≤6 h) and long TST (OR = 1.16, 95% CI = 1.02-1.32 of 8-9 h; OR = 1.35, 95% CI = 1.19-1.54 of >9 h) were both associated with IADL. The mediation effect analyses observed that depression explained 64.80% of the total effect of short TST (≤6 h) and IADL, but was insignificant in long TST (8-9 h and >9 h). Meanwhile, gender has moderating effects on the mediation effect model. Conclusion: The study suggests that health interventions that focused on the dimensions of TST and depression are crucial for preventing functional disability while accounting for gender differences.

Prediction of depressive symptoms onset and long-term trajectories in home-based older adults using machine learning techniques

OBJECTIVES

Our aim was to explore the possibility of using machine learning (ML) in predicting the onset and trajectories of depressive symptom in home-based older adults over a 7-year period.

METHODS

Depressive symptom data (collected in the year 2011, 2013, 2015 and 2018) of home-based older Chinese (n = 2650) recruited in the China Health and Retirement Longitudinal Study (CHARLS) were included in the current analysis. The latent class growth modeling (LCGM) and growth mixture modeling (GMM) were used to classify different trajectory classes. Based on the identified trajectory patterns, three ML classification algorithms (i.e. gradient boosting decision tree, support vector machine and random forest) were evaluated with a 10-fold cross-validation procedure and a metric of the area under the receiver operating characteristic curve (AUC).

RESULTS

Four trajectories were identified for the depressive symptoms: no symptoms (63.9%), depressive symptoms onset {incident increasing symptoms [new-onset increasing (16.8%)], chronic symptoms [slowly decreasing (12.5%), persistent high (6.8%)]}. Among the analyzed baseline variables, the 10-item Center for Epidemiologic Studies Depression Scale (CESD-10) score, cognition, sleep time, self-reported memory were the top five important predictors across all trajectories. The mean AUCs of the three predictive models had a range from 0.661 to 0.892.

CONCLUSIONS

ML techniques can be robust in predicting depressive symptom onset and trajectories over a 7-year period with easily accessible sociodemographic and health information.

Supplemental data for this article is available online at http://dx.doi.org/10.1080/13607863.2022.2031868.

What factors are associated with functional impairment among the oldest old?

Purpose

Most of the existing studies did not explicitly focus on the oldest old who are at high risk of functional impairment. Moreover, some potential risk factors (such as financial poverty) of functional impairment have been neglected so far. Thus, our aim was to clarify the determinants (with a particular emphasis on financial poverty) of functional impairment exclusively among the oldest old.

Methods

Data were taken from the "Survey on quality of life and subjective well-being of the very old in North Rhine-Westphalia (NRW80+)" - a representative sample of individuals ≥80 years (community-dwelling and in institutionalized settings) in North Rhine-Westphalia (n = 1,863, average age was 86.5 years, ranging from 80 to 102 years). Common tools were used to quantify functional impairment. In regression analysis, these determinants were included: sex, age, marital status, educational level, income poverty, asset poverty, depressive symptoms, cognitive impairment, and the number of chronic conditions.

Results

Multiple linear regressions showed that higher functional impairment was associated with being female (ADL, β = 0.06, p < 0.01; IADL, β = 0.09, p < 0.01), higher age (ADL, β = 0.02, p < 0.001; IADL, β = 0.04, p < 0.001), low education (compared to high education: IADL, β = -0.10, p < 0.05), the presence of income poverty (ADL, β = 0.09, p < 0.05; IADL, β = 0.16, p < 0.01), more depressive symptoms (ADL, β = 0.12, p < 0.001; IADL, β = 0.14, p < 0.001), higher cognitive impairment (ADL, β = -0.03, p < 0.001; IADL, β = -0.06, p < 0.001), and a higher number of chronic conditions (ADL, β = 0.03, p < 0.001; IADL, β = 0.05, p < 0.001).

Conclusion

Several determinants of functional impairment among the oldest old have been identified (i.e., being female, higher age, low education, presence of income poverty, more depressive symptoms, higher cognitive impairment, and more chronic conditions). Such knowledge (e.g., regarding the association between income poverty and functional impairment) may assist in characterizing individuals aged 80 years and over at high risk for functional impairment. Ultimately, such knowledge may help to design specific interventions for high risk groups. Moreover, such knowledge may enrich the research areas addressing inequalities.

A hybrid machine learning model of depression estimation in home-based older adults: a 7-year follow-up study

BACKGROUND

Our aim was to explore whether a two-step hybrid machine learning model has the potential to discover the onset of depression in home-based older adults.

METHODS

Depression data (collected in the year 2011, 2013, 2015 and 2018) of home-based older Chinese (n = 2,548) recruited in the China Health and Retirement Longitudinal Study were included in the current analysis. The long short-term memory network (LSTM) was applied to identify the risk factors of participants in 2015 utilizing the first 2 waves of data. Based on the identified predictors, three ML classification algorithms (i.e., gradient boosting decision tree, support vector machine and random forest) were evaluated with a 10-fold cross-validation procedure and a metric of the area under the receiver operating characteristic curve (AUROC) to estimate the depressive outcome.

RESULTS

Time-varying predictors of the depression were successfully identified by LSTM (mean squared error =0.8). The mean AUCs of the three predictive models had a range from 0.703 to 0.749. Among the prediction variables, self-reported health status, cognition, sleep time, self-reported memory and ADL (activities of daily living) disorder were the top five important variables.

CONCLUSIONS

A two-step hybrid model based on "LSTM+ML" framework can be robust in predicting depression over a 5-year period with easily accessible sociodemographic and health information.

Effects of pain and depression on the relationship between household solid fuel use and disability among middle-aged and older adults

Household air pollution (HAP) is suggested to increases people's risk of disability, but mediating mechanisms between HAP and disability remains under-investigated. The aim of this study was to investigate the underlying mechanisms between household air pollution and disability in middle-aged and older adults (i.e., older than 45 years) using a nationally representative prospective cohort. In total, 3754 middle-aged and older adults were selected from the China Health and Retirement Longitudinal Study. Correlation analysis and logistic regression analysis were employed to estimate the association between HAP, pain, depression and disability. Finally, three significant mediation pathways through which HAP directly impacts disability were found: (1) pain (B = 0.09, 95% CI 0.01, 0.02), accounting for 15.25% of the total effect; (2) depression (B = 0.07, 95% CI 0.004, 0.02), accounting for 11.86% of the total effect; (3) pain and depression (B = 0.04, 95% CI 0.003, 0.01), accounting for 6.78% of the total effect. The total mediating effect was 33.89%. This study clarified that HAP can indirectly affect disability through the respective and serial mediating roles of pain and depression. These findings potentially have important implications for national strategies concerning the widespread use of clean fuels by citizens.

Association between functional disability and long-term trajectories of depressive symptoms: Evidence from the China Health and Retirement Longitudinal Study

BACKGROUND

Prior research has suggested that functional disability was associated with increased risk of incident depressive symptoms in the elderly. However, little is known about the potential role of functional disability on the long-term trajectories of depressive symptoms among middle-aged and older Chinese adults.

METHODS

Data were drawn from the China Health and Retirement Longitudinal Study. A total of 8415 participants with up to four measurements of depressive symptoms assessed by the Center for Epidemiologic Studies Depression Scale (CESD) were included. Functional disability was evaluated by activities of daily living (ADLs) and instrumental ADLs (IADLs) at baseline. We identified the trajectories of depressive symptoms over 7-year follow-up using group-based trajectory modelling, and examined the association between functional disability and depressive symptom trajectories using multinomial logistic regression.

RESULTS

We identified four trajectories of depressive symptoms throughout the follow-up, characterized by maintaining a low CES-D score (low symptoms); maintaining a moderate CES-D score (moderate symptoms); increasing progressively and reaching a high CES-D score at the end of follow-up (increasing symptom); and increasing quickly and maintaining a high CES-D score (high symptoms). We found that participants with severe functional disability were at increased likelihood of being in the moderate (odds ratio [OR] = 2.27, 95% confidence interval [CI] 1.68-3.07), increasing (OR = 2.31, 95% CI 1.49-3.59), and high (OR = 4.74, 95% CI 3.07-7.31) depressive symptom trajectories.

LIMITATIONS

Depressive symptoms and functional disability were evaluated based on self-reported scales.

CONCLUSIONS

Our findings suggest that functional disability was associated with unfavorable depressive symptom trajectories among middle-aged and older Chinese adults.

Association between self-care disability and depressive symptoms among middle-aged and elderly Chinese people

Objective

In the context of an increased focus on geriatric depression in recent years, this study examined the associations between different types of self-care disability, the number of self-care disabilities, and depressive symptoms among middle-aged and elderly Chinese people.

Method

The data for this study were extracted from the follow-up survey (conducted in 2018) of the China Health and Retirement Longitudinal Study (CHARLS). The sample comprised 10808 participants aged 45 years and older. The Activities of Daily Living (ADL) scale and the Center for Epidemiological Studies Depression (CESD-10) Scale were used to assess self-care disability and depressive symptoms, respectively.

Result

The prevalence of depressive symptoms and self-care disability among the surveyed residents was 45.1% and 23.4%, respectively. Overall, there was a significant positive association between self-care disability and depressive symptoms. Participants who reported having a self-care disability in relation dressing, bathing, transferring in and out of bed, using the toilet, and controlling urination and defecation were found to have a significantly higher risk of depressive symptoms. In addition, participants with a greater cumulative quantity of self-care disabilities had a higher risk of depressive symptoms, and higher CESD-10 scores.

Conclusion

Self-care disability is a risk factor for depressive symptoms among middle-aged and elderly Chinese people. A positive correlation between the number of self-care disabilities and the risk of depressive symptoms was found.

Brain pathology and cognitive scores prior to onset of late-life depression

OBJECTIVES

Understanding the biological changes that occur prior to onset of late-life depression (LLD) is key to its prevention. To investigate potential predictors of LLD, we assessed cognitive scores and neurodegenerative and vascular biomarkers in healthy older adults who later developed depression.

METHODS

Longitudinal data from the Alzheimer's Disease Neuroimaging Initiative of 241 cognitively unimpaired and non-depressed older adults aged 56-90 at baseline with at least 4 years of follow-up were included. Participants were classified based on whether they developed an incident depression (n = 96) or not (n = 145). Cognitive measures of memory, executive functioning, and language, and biomarkers proposed to be related to LLD: hippocampal volume, white matter hyperintensity volume (WMH), and cortical and cerebrospinal fluid (CSF) amyloid beta levels, were compared between the incident depression and the never-depressed groups at four time points: at baseline, the visit prior to onset, at onset, and after the onset of depression.

RESULTS

In the incident depression group, there was a mild decline in cognitive scores from baseline to the visit before depression onset compared with the never-depressed group. The cognitive differences between the groups became more marked after depression onset. Baseline cortical amyloid burden, CSF amyloid beta levels, and WMH were significant predictors of incident depression. Compared to the non-depressed group, hippocampal volume was not reduced before onset, but was reduced following depression.

CONCLUSIONS

Amyloid pathology and WMH can predict future development of LLD in cognitively unimpaired individuals and may be involved in precipitating vulnerability for depression in older adults.

Psychosocial aspects and support networks associated with disability in two longevous populations in Brazil: a cross-sectional study

BACKGROUND

Among the oldest old, aged 80 years and over, the prevalence of disability is higher than in other age groups and can be considered a predictor of mortality.

OBJECTIVE

To evaluate how psychosocial aspects and support networks influence the disability of these oldest-old individuals, performing a comparison between two longevous populations, one living in one of the poorest regions of Brazil, in the backlands of Paraíba, and another living in one of the largest urban centres in Latin America.

METHOD

A cross-sectional study in which 417 oldest-old persons aged 80 years and older were interviewed, with data collected through the "Health, Welfare and Ageing" survey conducted in two Brazilian cities. Disability was assessed by reporting the need for assistance in Activities of Daily Living (ADLs) and Instrumental Activities of Daily Living (IADLs). Bivariate and multiple analyses were performed using R statistical software.

RESULTS

Food insufficiency in the first years of life had negative repercussions on the disability of oldest old people living in the northeast. On the other hand, in this region, older people have a higher rate of support and live longer with their peers, which may contribute to reducing feelings of loneliness, depressive symptoms, and worse self-perception of health. In the Southeast, financial constraints, subjective poverty, and unmet needs may favour the development of functional limitations between long-lived people.

CONCLUSION

Our findings indicate that regional differences in Brazil may influence the disability of older people aged 80 and older. In northeast Brazil, having no partner may contribute to disability for ADLs and IADLs; while, in the longevous population of São Paulo, having a worse self-rated health may contribute to disability for IADLs.

Informal Caregiving, Loneliness and Social Isolation: A Systematic Review

Background: Several empirical studies have shown an association between informal caregiving for adults and loneliness or social isolation. Nevertheless, a systematic review is lacking synthesizing studies which have investigated these aforementioned associations. Therefore, our purpose was to give an overview of the existing evidence from observational studies. Materials and Methods: Three electronic databases (Medline, PsycINFO, CINAHL) were searched in June 2021. Observational studies investigating the association between informal caregiving for adults and loneliness or social isolation were included. In contrast, studies examining grandchild care or private care for chronically ill children were excluded. Data extractions covered study design, assessment of informal caregiving, loneliness and social isolation, the characteristics of the sample, the analytical approach and key findings. Study quality was assessed based on the NIH Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies. Each step (study selection, data extraction and evaluation of study quality) was conducted by two reviewers. Results: In sum, twelve studies were included in our review (seven cross-sectional studies and five longitudinal studies)—all included studies were either from North America or Europe. The studies mainly showed an association between providing informal care and higher loneliness levels. The overall study quality was fair to good. Conclusion: Our systematic review mainly identified associations between providing informal care and higher loneliness levels. This is of great importance in assisting informal caregivers in avoiding loneliness, since it is associated with subsequent morbidity and mortality. Moreover, high loneliness levels of informal caregivers may have adverse consequences for informal care recipients.

Personality and functional impairment. Evidence from the Survey of Health, Ageing and Retirement in Europe

BACKGROUND

To date, only a few studies have investigated the association between personality and functional impairment. Therefore, our purpose was to add to this knowledge.

METHODS

Data from wave 7 of the Survey of Health, Ageing and Retirement in Europe (SHARE) were used (70 028 individuals in the analytical sample). Personality was measured using the 10-item Big Five Inventory (BFI-10). Functional impairment was quantified using activities of daily living (ADL) and instrumental activities of daily living (IADL) indices. Multiple linear regressions were conducted.

RESULTS

Regressions showed that an increased likelihood of limitations in ADL was associated with higher extraversion, higher agreeableness, lower conscientiousness, higher neuroticism, and higher openness to experience. Similarly, an increased likelihood of limitations in IADL was associated with higher agreeableness, lower conscientiousness, higher neuroticism, and higher openness to experience (only with one IADL index).

CONCLUSIONS

This knowledge of associations between personality and functional limitations may help in determining individuals at risk for increased functional impairment (e.g., individuals with low conscientiousness or high neuroticism). Future research is needed to clarify the underlying mechanisms.

The mediating and moderating effects of depressive symptoms on the prospective association between cognitive function and activities of daily living disability in older adults

OBJECTIVES

This study aimed to examine to what extent depressive symptoms mediated and moderated the association between cognitive function and activities of daily living (ADL) disability in older adults.

METHODS

In older participants from the China Health and Longitudinal Retirement Survey (CHARLS), structural equation modeling and multiple regression were performed to examine the mediating and moderating role of depressive symptoms (measured by the 10-item Center for Epidemiologic Studies Depression Scale) in the association between baseline cognitive function (episodic memory, attention, orientation to time, and visuospatial ability) and endpoint disability in basic ADL (BADL) or instrumental ADL (IADL).

RESULTS

Over a 2-year follow-up, among 1677 participants (67.5 ± 6.0 years old) free of BADL disability and 1194 participants (66.9 ± 5.6 years old) free of IADL disability, 8.3% and 22.9% developed BADL disability and IADL disability, respectively. Good baseline cognitive performance was significantly associated with the reduced incidence of BADL/IADL disability. The indirect effects of baseline depressive symptoms explained 16.9% and 14.5% of the total effect between cognition and BADL and IADL dependency, respectively. The Johnson-Neyman technique identified a threshold of 7.88 for endpoint depressive symptoms, beyond which the protective effect of baseline cognitive function on BADL emerged.

CONCLUSIONS

In older adults, good cognitive function reduces the risk of BADL/IADL disability. Depressive symptoms downregulate the protective effect of cognitive function on BADL/IADL over time. Intervention techniques focusing on the simultaneous improvement of cognitive dimensions and depression help improve ADL difficulty and prevent disability in older adults.

The mediating and moderating effects of depression on the relationship between cognitive function and difficulty in activities of daily living among postmenopausal women

OBJECTIVE

Cognitive function and depression impact critically the daily functioning of menopausal women. This study aimed to explore the mediating and moderating effects of depressive symptoms on the association between cognitive function and activities of daily living (ADL) difficulty in postmenopausal women.

METHODS

A total of 2,596 postmenopausal women from the China Health and Retirement Longitudinal Study completed the Chinese version of the Mini-Mental State Examination, basic ADL (BADL) and instrumental ADL (IADL) scales, and 10-item Short-Form Center for Epidemiological Studies Depression. We constructed structural equation modeling to examine the association between cognitive function, depressive symptoms, and BADL/IADL difficulty.

RESULTS

The prevalence of BADL/IADL difficulty in postmenopausal women was 22.5% and 31.5%, respectively. After adjustments for demographic and health-related covariates, cognitive decline (contributed by four cognitive dimensions with different weights) was significantly associated with BADL/IADL difficulty (contributed by six-item daily activities with different weights). Depressive symptoms mediated and explained 28.8% and 23.2% of cognitive function associations with BADL and IADL difficulty, respectively. The Johnson-Neyman technique identified a threshold of eight and four for depressive symptoms, beyond which the protective effect of cognitive function on BADL and IADL emerged.

CONCLUSIONS

Depressive symptoms mediated and moderated the association between cognition and BADL/IADL difficulty in postmenopausal women. Compared with BADL, IADL may be more sensitive to changes in cognitive function. More strength should be put on developing comprehensive intervention techniques focusing on simultaneous intervention of multidimensional cognitive function and depression to maintain and improve the quality of life of postmenopausal women.

The Impact of Late-Life Disability Spectrum on Depressive Symptoms: A Fixed-Effects Analysis of Panel Data

OBJECTIVES

This study examines the impact of a previously validated disability spectrum that accounts for compensatory strategies on depressive symptoms in older adults.

METHODS

This study was a secondary data analysis of 2011 through 2018 surveys from the National Health and Aging Trends Study (N = 7,609). The disability spectrum was categorized using a 5-level hierarchical scheme: fully able, successful accommodation, reduced activity, difficulty, and assistance for 12 mobility, self-care, and household activities. The individual fixed-effects panel model was used to examine the impact of this disability spectrum on depressive symptoms.

RESULTS

Depressive symptoms rose progressively with each successive category on the disability spectrum in descriptive analyses. In fixed-effects models, moving from "fully able" to "successful accommodation" was not associated with significant changes in depressive symptoms; this result held for all self-care and mobility activities. Moving from "fully able" to "reduced activity" was associated with a significant increase in depressive symptoms for 3 household activities (doing laundry, making hot meals, and shopping for groceries) but not for paying bills/banking or keeping track of medications. Going up 2 or more stages above "fully able" on the disability spectrum was associated with a significant increase in depressive symptoms across all 12 activities.

DISCUSSION

While limitations in a range of daily activities have harmful effects on mental health, using compensatory strategies that do not erode one's perception of autonomy can help older adults cope with the psychological detriments of late-life disability.

Association between physical disability and incidence of depressive symptoms in older Mexican adults

Introducción.

Las limitaciones funcionales asociadas con el proceso de envejecimiento pueden conducir al desarrollo de síntomas depresivos e incrementar la vulnerabilidad de los adultos mayores.

Objetivo.

Estimar la asociación entre la discapacidad física y la incidencia de síntomas depresivos clínicamente significativos en adultos mayores mexicanos.

Materiales y métodos.

Se hizo un estudio retrospectivo de cohorte con datos provenientes de la Encuesta Nacional sobre Salud y Envejecimiento en México (ENASEM). La muestra analítica (n=6.780) incluyó a adultos mayores de 50 años que contaran con mediciones de las variables principales y que no presentaran síntomas depresivos clínicamente significativos en la ronda cero. Estos síntomas se evaluaron con la escala CESD-9 y, la discapacidad, mediante el reporte de limitaciones para la realización de actividades básicas o instrumentales de la vida diaria. Se hicieron análisis descriptivos, bivariados y multivariados, utilizando el modelo de regresión logística y ajustando según las variables sociodemográficas, las condiciones de salud, las adversidades de la infancia, la participación social y los eventos vitales estresantes.

Resultados.

La incidencia de síntomas depresivos clínicamente significativos fue de 25,75 % (IC₉₅% 24,70-26,80). Comparados con aquellas personas sin limitaciones para las actividades instrumentales, se encontró un incremento del 68 % en el riesgo para el desarrollo de dichos síntomas (IC₉₅% 1,10-2,57; p=0,015). En el modelo de actividades básicas de la vida diaria, la razón de probabilidad (odds ratio, OR) para su desarrollo fue de 1,36 (1,01-1,81; p=0,039), ambos ajustados por variables de confusión.

Conclusión.

Las limitaciones en la vida diaria son un factor de riesgo importante para el desarrollo de síntomas depresivos clínicamente significativos en personas con seguimiento de dos años.

Depressive Symptoms and Frailty Among the Oldest Old: Evidence from a Multicenter Prospective Study

OBJECTIVE

There is a lack of studies disentangling whether changes in frailty are associated with subsequent changes in depressive symptoms or vice versa among the oldest old. Consequently, we aimed to disentangle this link.

DESIGN

Three waves [follow-up (FU) wave 7 to FU wave 9; n = 423 individuals in the analytical sample] were used from the multicenter prospective cohort study "Needs, Health Service Use, Costs and Health-Related Quality of Life in a Large Sample of Oldest-Old Primary Care Patients (85+)" (AgeQualiDe).

SETTING AND PARTICIPANTS

Primary care patients aged 85 years and older.

METHODS

The Canadian Study of Health and Aging (CSHA) Clinical Frailty Scale (CFS) was used to quantify frailty, and the Geriatric Depression Scale was used to measure depressive symptoms. It was adjusted for several covariates (sociodemographic and health-related factors) in regression analysis.

RESULTS

Multiple linear regressions with first differences showed that initial increases in depressive symptoms (from FU wave 7 to FU wave 8) were associated with subsequent increases in frailty (from FU wave 8 to FU wave 9; β = 0.06, P < .05), whereas initial increases in frailty (from FU wave 7 to FU wave 8) were not associated with subsequent increases in depressive symptoms (from FU wave 8 to FU wave 9).

CONCLUSIONS AND IMPLICATIONS

The study findings suggest the relevance of increases in depressive symptoms for subsequent increases in frailty. Treatment of depressive symptoms may also be beneficial to postpone frailty.

Late-Life Depressive Symptoms Are Associated With Functional Impairment Cross-sectionally and Over Time: Results of the AgeMooDe Study

OBJECTIVES

This study examines the relationship between late-life depressive symptoms, cognitive and functional impairment in a cohort of very old community-based participants.

METHODS

A sample of 1,226 primary care patients was assessed at baseline (Mage = 80.6 years). Statistical analyses were conducted using baseline and 12-month follow-up data.

RESULTS

At baseline, depressed participants showed minor cognitive deficits compared with nondepressed participants, whereas functional deficits were pronounced. Depressive symptoms and global cognition were not associated longitudinally. In contrast, follow-up functional impairment was predicted by baseline level and increase of depressive symptoms between baseline and follow-up. Reversely, follow-up depressive symptoms were predicted by functional decline between baseline and follow-up, whereas baseline functional status was not predictive.

DISCUSSION

Depressive symptoms and global cognitive function were not associated longitudinally, but level and increase of depressive symptoms over time predicted functional impairment after 1 year. Interventions to reduce depressive symptoms, or to encourage coping strategies might be promising to reduce functional impairment. Elevated follow-up depressive symptoms were only predicted by functional decline, supposedly emphasizing that incident functional impairment might be associated with an acute increase of depressive symptoms. Psychological adjustment processes were not examined, but might be targeted in future.

Prevalence and Correlates of Individuals Screening Positive for Depression and Anxiety on the PHQ-4 in the German General Population: Findings from the Nationally Representative German Socio-Economic Panel (GSOEP)

Our aim was to estimate the prevalence and correlates of probable depression and anxiety in the general adult population in Germany. Repeated cross-sectional data (i.e., cross-sectional data observed at different time points: year 2012 and year 2014) were derived from the innovation sample of the German Socio-Economic Panel, a population-based study of German households. The validated Patient Health Questionnaire (PHQ-4) was used to measure probable depression and anxiety. In the analytical sample, n equaled 2952 individuals. According to the PHQ-4 cut-off values, 10.4% of the individuals had probable depression and 9.8% of the individuals had probable anxiety. Regressions revealed that the likelihood of depression was positively associated with lower age (OR: 0.98 (95% CI: 0.98-0.99)), being unmarried (and living together with spouse) (OR: 0.75 (0.58-0.98)), worse self-rated health (OR: 1.99 (1.73-2.27)), and more chronic diseases (OR: 1.18 (1.07-1.31)). Furthermore, the likelihood of anxiety was positively associated with being female (OR: 1.36 (95% CI: 1.04-1.76)), lower age (OR: 0.98 (95% CI: 0.97-0.99)), low education (medium education, OR: 0.69 (0.50-0.95)), worse self-rated health (OR: 2.00 (1.74-2.30)), and more chronic diseases (OR: 1.15 (1.03-1.27)). The magnitude of depression and anxiety was highlighted. Clinicians should be aware of the factors associated with probable depression and anxiety.

The moderating role of flexible goal adjustment in the link between pain and depressive symptoms: findings based on a nationally representative sample of older adults

BACKGROUND

Pain is a frequent phenomenon in old age. It has been shown that increases in pain are longitudinally associated with depressive symptoms. This strong link can be attenuated by coping strategies like resilience. However, to date, there is a lack of longitudinal studies, based on nationally representative samples that have examined whether flexible goal adjustment moderates the relation between pain and depressive symptoms. Thus, the purpose of this study was to identify whether there is a longitudinal association between pain and depressive symptoms, and to examine whether flexible goal adjustment moderates this link.

METHODS

Longitudinal data (wave 3 and wave 4; 5582 observations) were taken from a sample (German Ageing Survey) which is nationally representative for middle-aged and older adults (40 years and over). A widely used pain measurement (single-item measure) served as the key independent variable. An instrument created by Brandstaedter and Renner was used to quantify flexible goal adjustment. The 15-item version of the Centre for Epidemiologic Studies Depression Scale was used to measure depressive symptoms.

RESULTS

Linear fixed effects regressions demonstrated that an increase in pain was associated with an increase in depressive symptoms (β = 0.42, P < 0.001). Moreover, flexible goal adjustment significantly moderated this association (β = -0.39, P < 0.01). With regard to potential confounders, an increase in depressive symptoms was associated with increasing age and worsening self-rated health.

CONCLUSION

The study findings showed that increasing pain leads to more depressive symptoms using a longitudinal approach. In addition, flexible goal adjustment moderated this link. Therefore, programs aiming at improving flexible goal adjustment may assist in avoiding an increase in depressive symptoms alongside pain increases among older adults.

A cross-lagged model of depressive symptoms and mobility disability among middle-aged and older Chinese adults with arthritis

AIM

To examine the reciprocal and longitudinal associations between depressive symptoms and mobility disability in middle-aged and older Chinese adults with arthritis.

METHODS

We used three waves of the China Health and Retirement Longitudinal Study. The analytic sample included 4682 community-dwelling adults aged ≥45 years with arthritis who completed the self-report measurement of depressive symptoms and mobility disability every 2 years over a 4-year study period. Analysis involved an autoregressive cross-lagged model.

RESULTS

The prevalence rates of comorbid depressive symptoms and mobility disability were 38.9%, 33.2% and 38.9%, respectively across three waves. There was a significant bidirectional and longitudinal relationship between depressive symptoms and mobility disability among middle-aged and older Chinese adults with arthritis. A higher level of depressive symptoms in previous waves was associated with a subsequent increase in mobility disability over time. A similar pattern was also shown in the opposite direction from mobility disability to depressive symptoms over time.

CONCLUSIONS

This study demonstrates that depressive symptoms and mobility disability are reciprocally related in Chinese adults with arthritis over time. In addition, it highlights the importance of early interventions aimed at reversing the downward spiral of depressive symptoms and mobility disability to improve the health of Chinese adults with arthritis. Geriatr Gerontol Int 2020; 20: 873-877.

Interaction between worsening cognitive function and deteriorating functional status on depressive symptoms among Chinese community-dwelling elders

AIM

Cognitive impairment and functional deterioration are common in later life and often co-occur with depressive symptoms (DS). This study aims to examine the individual effects and possible interaction between worsening cognitive function (CF) and deteriorating functional status (FS) on DS using large sample, longitudinal data.

METHODS

Elderly people who completed the baseline survey of China Health and Retirement Longitudinal Study (CHARLS 2011) and the third wave survey (2015) were included. A multivariable logistic regression model was used to assess the individual effects. The relative excess risk due to interaction (RERI), the attributable proportion due to interaction (AP) and synergy index (SI) were calculated to evaluate the additive interaction.

RESULTS

Worsening CF and deteriorating FS were associated with the increase in DS, while unchanged or improved CF and FS were associated with the decrease in DS. In addition, decreased (increased) FS led to more severe (improved) DS than decreased (increased) CF. The additive interaction between worsening CF and deteriorating FS on the increase in DS was significant. The estimates and 95% CI of the RERI, AP and SI were 0.626 (0.061, 1.190), 0.222 (0.042, 0.402) and 1.526 (1.016, 2.291) respectively.

CONCLUSIONS

Both worsening CF and deteriorating FS have positive interactions with the increase in DS. It is vital to focus on DS of elderly people with worsening CF and/or FS and to adopt interventions. Geriatr Gerontol Int 2020; 20: 343-347.

The relationship between lead and cadmium levels and functional dependence among elderly participants

The adverse impacts of lead and cadmium exposure on health outcomes have been reported in the past. Few studies have been conducted on the relationship between lead and cadmium exposures and disability. We evaluated whether lead and cadmium exposures were associated with functional dependence including the total number of disabilities, activities of daily living (ADL), instrumental activities of daily living (IADL), leisure and social activities (LSA), lower extremity mobility (LEM), and general physical activities (GPA) in an elderly population. A total of 5513 eligible subjects were enrolled in the study from the National Health and Nutrition Examination Survey 2001-2006. Serum lead and cadmium exposure assessments were performed using atomic absorption spectrometry. Functional dependence was assessed by 19 structured questions. The relationships between lead and cadmium exposures and functional dependence were investigated using by multivariable linear regression models. Q2, Q3, and Q4 of lead exposure were significantly associated with the total number of disabilities, with β coefficients of - 0.62 (95% CI - 0.99, - 0.24), - 0.64 (95% CI - 1.02, - 0.26), and - 0.81 (95% CI - 1.19, - 0.42), respectively. This relationship remained significant in males. Furthermore, we analyzed the relationships between lead and cadmium exposure quartiles and various functional dependence metrics, and we determined that lead content was significantly associated with decreased ADL, LEM, and GPA (p < 0.05) and cadmium content was inversely associated with ADL (p < 0.05). Our study demonstrated a strong relationship between exposure to lead and cadmium and functional dependence in an elderly population.

Morbidity and mortality in very old individuals with subsyndromal depression: an 8-year prospective study

OBJECTIVES

Both morbidity and mortality are elevated for individuals with subsyndromal depression (SSD) compared to non-depression (ND) in those of younger ages, but scientific studies are scarce for very old individuals. The aim of this study was therefore to compare the morbidity and mortality in very old individuals with SSD and ND.

DESIGN AND SETTING

An 8-year prospective population-based study was undertaken on 85-year-old individuals in Sweden.

MEASUREMENTS

Data were collected from postal questionnaires and clinical assessments at baseline, after 1, 5, and 8 years. Depressive symptoms were measured with Geriatric Depression Scale and the results were classified into ND, SSD, and syndromal depression. Mortality was investigated using multivariable cox regressions, and variables of morbidity were investigated using linear mixed models.

RESULTS

Compared to ND, in people with SSD, mortality was elevated in the univariate regression, but this association vanished when controlling for relevant covariates. Morbidity was elevated with regard to basic activities of daily living (ADLs), instrumental ADLs, loneliness, self-perceived health, and depressive symptoms for individuals with SSD compared to ND, whereas cognitive speed, executive functions, and global cognitive function were not significantly impaired when adjusting for covariates.

CONCLUSIONS

SSD among very old individuals is longitudinally associated with elevated morbidity but not mortality, when controlling for relevant covariates. Considering the high prevalence of SSD and the demographic development of increasing numbers of very old people, the findings highlight the need to develop clinical and societal strategies to prevent SSD and associated negative outcomes.

Association between activities of daily living disability and depression symptoms of middle-aged and older Chinese adults and their spouses: A community based study

BACKGROUND

Little is known about the impact of activities of daily living (ADL) disability on personal and spouse depression symptoms among Chinese.

METHODS

We used data from the baseline and 2013 follow-up surveys of the China Health and Retirement Longitudinal Study, a nationally representative survey in 17,708 adults aged 45 years and older, to evaluate cross-sectional and prospective association between ADL disability and depression symptoms of subjects and their spouses. The derived basic ADL scale (BADL) and the Center for Epidemiologic Studies Depression Scale short form were utilized to assess ADL disability and depressive symptoms, respectively. Logistic regression was used to calculate odds ratio (OR) and 95% confidence interval (CI), adjusting for depression risk factors and taking into account the complex survey design and response rate.

RESULTS

There were 15,890 subjects included in the study. Prevalence of baseline depression symptoms was 29.5% (95%CI 27.9-31.1%), 58.0% (95%CI 54.5-61.4%) and 73.6% (95%CI 70.4-76.8%) in subjects with BADL scores of 0, 1 and ≥2, respectively, and 27.0% (95%CI 25.3-28.7%), 34.2% (95%CI 30.0-38.4%) and 43.8% (95%CI 39.1-48.5%) in subjects without ADL disability while having spouses with BADL scores of 0, 1 and ≥2, respectively. Prospectively, BADL score ≥2 was associated with higher risk of depression symptoms of subjects (OR 1.63, 95% CI 1.03-2.57) and their spouses (OR 1.50, 95% CI 1.01-2.22).

LIMITATIONS

Bias might be introduced because of observational study design, and findings may not be generalizable to younger population.

CONCLUSIONS

ADL disability might have potential to increase risk of depression symptoms of middle-aged and older Chinese adults and their spouses.

Calf Circumference as a Novel Tool for Risk of Disability of the Elderly Population

Disability became increasingly common with age, and crude rates of disability were rising around the globe. The aim of this study was to investigate the association between calf circumference (CC) and disability in the U.S. elderly population. From the 1999-2006 National Health and Nutrition Examination Survey, a total of 4,245 participants with an age range of 60-84 years were included. Disability was defined as the total number of difficulties within the following 5 major domains of disability, such as activities of daily living (ADL), instrumental ADL, general physical activities, lower extremity mobility, and leisure and social activities. The association between CC and disability was investigated through the regression model adjusted for multiple covariates. According to the fully adjusted model regarding disability, the β coefficients for each quartile of increasing CC were -0.041 for quartile 2 (P = 0.096), -0.060 for quartile 3 (P = 0.027), and -0.073 for quartile 4 (P = 0.026) respectively, compared with lowest quartile. There was a negative association between CC and disability among the elderly population. Calf circumference may be a novel risk assessment for disability of elderly people.