Biomedical subjects

Dorly J H Deeg

Publications and source records attributed to Dorly J H Deeg.

At least 19 recordsLinked to original sources

PubMed2007

The relationship between generalized anxiety disorder, depression and mortality in old age.

BACKGROUND: The association between depression and an increased risk of death in elderly persons has been established in both clinical and community studies. Co-occurrence of depression and generalized anxiety has been shown to represent more severe and more chronic psychopathology. However, little is known about the relation between generalized anxiety disorder, mixed anxiety-depression (generalized anxiety disorder and depression) and excess mortality in the elderly. OBJECTIVE: To investigate whether generalized anxiety and mixed anxiety-depression are associated with mortality. METHOD: Generalized anxiety disorder, mixed anxiety-depression and depression were assessed in 4051 older persons with a ten-year follow-up of community death registers. The mortality risk of generalized anxiety, depression and mixed anxiety-depression was calculated after adjustment for demographic variables, physical illness, functional disabilities and social vulnerability. RESULTS: In generalized anxiety disorder and mixed anxiety-depression no significant excess mortality was found. In depression a significant excess mortality was found in men [HR 1.44 (1.09-1.89)] but not in women [HR 1.04 (0.87-1.24)] after adjustment for the different variables. CONCLUSIONS: In elderly persons depression increases the risk of death in men. Neither generalized anxiety nor mixed anxiety-depression are associated with excess mortality. Generalized anxiety disorder may even predict less mortality in depressive elderly people. The relation between generalized anxiety disorder and its possibly protective effect on mortality has to be further explored.

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PubMed2006

Explanations of socioeconomic differences in changes in physical function in older adults: results from the Longitudinal Aging Study Amsterdam.

BACKGROUND: This study examines the association between socioeconomic status and changes in physical function in younger- (aged 55-70 years) and older-old (aged 70-85 years) adults and seeks to determine the relative contribution of diseases, behavioral, and psychosocial factors in explaining this association. METHODS: Data were from 2,366 men and women, aged 55-85 years, participating in the Longitudinal Aging Study Amsterdam (LASA). Two indicators of socioeconomic status were used: education and income. Physical function was measured by self-reported physical ability over nine years of follow-up. RESULTS: In older adults, low socioeconomic status was related to a poorer level of physical function during nine years of follow-up. In subjects who were between 55 and 70 years old, there was an additional significant socioeconomic-differential decline in physical function, while socioeconomic differentials did not further widen in subjects 70 years and older. Behavioral factors, mainly BMI and physical activity, largely explained the socioeconomic differences in physical function in the youngest age group, while psychosocial factors reduced socioeconomic status differences most in the oldest age group. CONCLUSION: The findings indicate age-specificity of both the pattern of socioeconomic status differences in function in older persons and the mechanisms underlying these associations.

Activities of Daily Living↗

PubMed2006

Personality and the onset of depression in late life.

BACKGROUND: This study addresses the question whether personality is a predictor for becoming depressed in late life. We expect that personality traits are significantly associated with the onset of depression, but that the effect of personality is overwhelmed by the effect of health related variables. The second research question concerns whether the strength of this association is affected by the influence of age or age-related deteriorations in the other prognostic factors. We hypothesize to find that a high neuroticism level or low levels of mastery, self-efficacy or self-esteem strengthen the impact of the health-related variables and social situational factors on the onset of depression in late life. METHODS: Out of a population-based baseline sample (Longitudinal Aging Study Amsterdam) of 1511 non-depressed elderly respondents (55-85 years at baseline), 255 (17%) developed a clinically relevant level of depressive symptoms during the 6-year follow-up period. Data on the effect of personality on onset were analysed using logistic regression analyses. RESULTS: Both at univariate and multivariate level, the personality traits studied predicted the onset of depression. The effect of neuroticism was more strongly related to onset than health-related and social factors. Results revealed no significant interaction effects between the personality characteristics and age or the other prognostic factors on the association with onset of depression. DISCUSSION: Personality, neuroticism in particular, was found to be a consistent and important predictor of the onset of depressive symptoms in late life, even more important than health-related and situational factors, and aging did not affect the strength of this association.

Age Factors↗

PubMed2006

Late-life depression: the differences between early- and late-onset illness in a community-based sample.

BACKGROUND: Several studies have described etiological and clinical differences between elderly depressed patients with early onset of their illness compared to late onset. While most studies have been carried out in clinical samples it is unclear whether the findings can be generalized to the elderly population as a whole. The aim of this study was to compare early-onset (EOD) and late-onset (LOD) depressive illness in a community-based sample. METHODS: Large (n = 3107) representative sample of older persons (55-85 years) in the Netherlands. Two-stage screen procedure to identify elderly with MDD. The Center for Epidemiologic Studies Depression scale (CES-D) was used as a screen and the Diagnostic Interview Schedule (DIS) to diagnose MDD. Data on 90 older persons with early-onset depression and 39 with late-onset depression were available. RESULTS: Those with LOD were older, and more often widowed. Family psychiatric history, vascular pathology, and stressful early and late life events did not differ between groups. EOD subjects had more often double depression and more anxiety. CONCLUSIONS: In a community-based sample we did not detect clear differences in etiology and phenomenology between EOD and LOD. This discrepancy with reports from clinical samples could be due to selection bias in clinical studies. Consequently, all patients with late-life depression deserve a diagnostic work-up of both psychosocial and somatic risk factors and treatment interventions should be focused accordingly.

Age Distribution↗

PubMed2006

Inflammatory markers and loss of muscle mass (sarcopenia) and strength.

PURPOSE: The objective of this study was to investigate whether high levels of serum interleukin (IL)-6, C-reactive protein (CRP), and alpha1-antichymotrypsin (ACT) were associated with the loss of muscle strength or muscle mass (sarcopenia) in older persons. SUBJECTS: The study included 986 men and women of the Longitudinal Aging Study Amsterdam, with a mean age of 74.6 years (standard deviation 6.2). METHODS: Grip strength (n = 986) and appendicular muscle mass (n = 328, using dual-energy x-ray absorptiometry) were obtained in 1995 and 1996 and repeated after a 3-year follow-up. Loss of muscle strength was defined as a loss of grip strength greater than 40%, and sarcopenia was defined as a loss of muscle mass greater than 3%, approximating the lowest 15% of the study sample. RESULTS: Multiple linear and logistic regression analyses revealed that higher levels of IL-6 were associated with greater decline in muscle strength, which decreased by -3.21 kg (standard error 0.81) per standard deviation increase in log-transformed IL-6. After adjustment for confounders, including sociodemographic, health, and lifestyle factors, high IL-6 (>5 pg/mL) and high CRP (>6.1 mug/mL) were associated with a 2 to 3-fold greater risk of losing greater than 40% of muscle strength. Persons with high levels of ACT (>181% of the normal human pooled plasma) were 40% less likely to experience loss of muscle strength and tended (P = .07) to have a smaller decline in muscle mass compared with those in the lowest quartile of ACT. No consistent associations of IL-6 and CRP with sarcopenia were found. CONCLUSION: The findings of this prospective, population-based study suggest that higher levels of IL-6 and CRP increase the risk of muscle strength loss, whereas higher levels of ACT decrease the risk of muscle strength loss in older men and women.

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PubMed2006

Socioeconomic differences in incident depression in older adults: the role of psychosocial factors, physical health status, and behavioral factors.

OBJECTIVE: The objective of this study was to examine the association between socioeconomic status (SES) and the onset of depression in older adults and to determine the relative contribution of psychosocial factors, physical health status, and behavioral factors in explaining this link. METHODS: Data were from 2593 men and women, aged 55-85 years, participating in the Longitudinal Aging Study Amsterdam. Two indicators of SES were used: education and income. The onset of depression was measured over 9 years of follow-up. RESULTS: Adjusted hazard ratios of incident depression were significantly higher in those with low education and low income. Psychosocial factors explained on average 16% of the SES differences in incident depression, physical health status on average 7%, and behavioral factors less than 5%. CONCLUSION: In older adults, low SES predicted the incidence of depression. Part of this association was explained by psychosocial factors and physical health status.

Activities of Daily Living↗

PubMed2006

Low serum concentrations of 25-hydroxyvitamin D in older persons and the risk of nursing home admission.

BACKGROUND: The prevalence of vitamin D deficiency in nursing home patients is high. OBJECTIVE: We aimed to ascertain whether lower serum 25-hydroxyvitamin D [25(OH)D] concentrations increase the risk of future nursing home admission and early death. DESIGN: We included 1260 independent, community-dwelling persons aged > or =65 y who were participating in the Longitudinal Aging Study Amsterdam (1995-1996). Study outcomes were time to nursing home admission during 6 y of follow-up and time to death until 1 April 2003. RESULTS: Vitamin D deficiency [25(OH)D < 25 nmol/L] and insufficiency [25(OH)D = 25-49.9 nmol/L] were present in 127 (10.1%) and 462 (36.7%) subjects, respectively. During follow-up, 138 subjects (11.0%) were admitted to nursing homes, and 380 subjects (30.2%) died. The risk of nursing home admission for participants with 25(OH)D deficiency was 53 cases per 1000 person-years higher than that for those with high 25(OH)D (> or =75 nmol/L) concentrations (58 compared with 5 cases). After adjustment for potential confounders, the hazard ratio (95% CI) of nursing home admission was 3.48 (1.39, 8.75) for vitamin D-deficient, 2.77 (1.17, 6.55) for vitamin D-insufficient, and 1.92 (0.79, 4.66) for vitamin D-borderline persons as compared with persons with high 25(OH)D (P for trend = 0.002). The results remained after additional adjustment for frailty indicators. Lower 25(OH)D was associated with higher mortality risk, but this association was not significant after adjustment for frailty indicators. CONCLUSION: Lower serum 25(OH)D concentrations in older persons are associated with a greater risk of future nursing home admission and may be associated with mortality.

Aged↗

PubMed2006

Cosmic transcendence and framework of meaning in life: patterns among older adults in the Netherlands.

OBJECTIVES: Gerotranscendence has been conceptualized as a potential development accompanying normal aging. Gerotranscendence is defined as a shift in metaperspective from a materialistic and pragmatic world view to a more cosmic and transcendent one. In the past decade, population-based studies have tested Tornstam's Gerotranscendence Scale. Its Cosmic Transcendence subscale, in particular, emerged as consistent. The aim of the present study was to examine (a) how cosmic transcendence relates to having a framework of meaning in life and (b) whether religiousness and demographic characteristics influence possible relationships. METHODS: Participants were 928 older Dutch adults who responded to a questionnaire that included the Cosmic Transcendence scale, aspects of religiousness, and the Framework of Meaning in Life subscale of the Life Regard Index. RESULTS: A substantial, positive association between cosmic transcendence and framework of meaning in life was observed. This association was much more pronounced among participants who were less involved in religion, who were women, who were age 75 or older, or who were widowed. DISCUSSION: The current study indicates that the personal relevance of cosmic transcendence depends on cultural factors such as secularization. Furthermore, cosmic transcendence seems to unfold as an important domain in the life view of women, the older old, and the widowed.

Adaptation, Psychological↗

PubMed2006

Depression in older age is a risk factor for first ischemic cardiac events.

OBJECTIVE: Depressive disorders have been shown to be associated with cardiac diseases and death, but the underlying disease mechanism is unclear. The authors hypothesized that the cardiac morbidity and mortality after depression in late life is mediated by subclinical atherosclerosis and is thus confined to ischemic heart diseases. METHOD: Using the population-based cohort of the Longitudinal Aging Study Amsterdam, 2,403 men and women aged 55 and over without cardiac disease were followed to assess the onset of cardiac disease or cardiac death. Ischemic heart diseases (angina pectoris, [non]fatal myocardial infarction) were distinguished from other cardiac diseases (congestive heart failure, arrhythmia). Major depressive disorder (MDD) was defined according to Diagnostic and Statistical Manual of Mental Disorders, Third Edition (DSM-III) criteria. Subthreshold depression was defined as clinically relevant depressive symptoms not fulfilling DSM criteria. RESULTS: After a mean follow up of 7.2 years, 444 first cardiac events occurred, of which 252 were primary ischemic events and 192 other cardiac events. Cox regression analysis adjusted for physical health variables showed that, when compared with nondepressed respondents, those with MDD had a relative risk (RR) of 2.09 (95% confidence interval: 1.13-3.85) for any cardiac event. Considering only ischemic events, the RR conferred by MDD increased to 3.00 (1.51-5.93), whereas the RR declined to 0.96 (0.24-3.89) for all other cardiac events. Subthreshold depression did not increase the risk of future cardiac events. CONCLUSION: Major depression in older age predicts first cardiac events. The excess cardiac morbidity and cardiac mortality after major depression could entirely be attributed to ischemic heart diseases.

Aged↗

PubMed2006

Prevention of late-life depression in primary care: do we know where to begin?

OBJECTIVE: This study attempted to compare two models for selective (people at elevated risk) and indicated (those with subsyndromal depressive symptoms) prevention and to determine the optimal strategy for prevention of late-life depression. METHOD: Onset was assessed at 3 years with the Geriatric Mental State AGECAT in a randomly selected cohort of 1,940 nondepressed and nondemented older people in Amsterdam. Risk factors that can easily be identified in primary care were used. RESULTS: The association of risk factors with depression incidence was expressed in absolute and relative risk estimates, number needed to treat, and population-attributable fractions. Prevention models were identified with classification and regression tree analyses. In the indicated prevention model, subsyndromal symptoms of depression were associated with a risk of almost 40% of developing depression and a number needed to treat of 5.8, accounting for 24.6% of new cases. Adding more risk factors raised the absolute risk to 49.3%, with a lower number needed to treat but also lower attributable fraction values. In the selective prevention model, spousal death showed the highest risk, becoming even higher if the subjects also had a chronic illness. Overall, the attributable fraction values in the indicated model were higher, identifying more people at risk. CONCLUSIONS: Consideration of the costs and benefits of both models in the context of the availability of evidence-based preventative interventions indicated that prevention aimed at elderly people with depressive symptoms is preferred. The focus on treatment should be readdressed; a new approach is needed, with a stronger emphasis on prevention.

Age Factors↗

PubMed2005

Frequency and determinants of advance directives concerning end-of-life care in The Netherlands.

In the USA, the use of advance directives (ADs) has been studied extensively, in order to identify opportunities to increase their use. We investigated the prevalence of ADs and the factors associated with formulation of an AD in The Netherlands, using samples of three groups: the general population up to 60 years of age, the general population over 60 years of age, and the relatives of patients who died after euthanasia or assisted suicide. The associated factors were grouped into three components: predisposing factors (e.g. age, gender), enabling factors (e.g. education) and need factors (e.g. health-related factors). We found that living wills had been formulated by 3% of younger people, 10% of older people, and 23% of the relatives of a person who died after euthanasia or assisted suicide. Most living wills concerned a request for euthanasia. In all groups, 26-29% had authorized someone to make decisions if they were no longer able to do so themselves. Talking to a physician about medical end-of-life treatment occurred less frequently, only 2% of the younger people and 7% of the older people had done so. Most people were quite confident that the physician would respect their end-of-life wishes, but older people more so than younger people. In a multivariate analysis, many predisposing factors were associated with the formulation of an AD: women, older people, non-religious people, especially those who lived in an urbanized area, and people with less confidence that the physician would respect their end-of-life wishes were more likely to have formulated an AD. Furthermore, the enabling factor of a higher level of education, the need factor of contact with a medical specialist in the past 6 months, and the death of a marital partner were associated with the formulation of an AD.

Adult↗

PubMed2005

Adiposity in relation to vitamin D status and parathyroid hormone levels: a population-based study in older men and women.

OBJECTIVE: In small case-control studies, obesity was associated with worse vitamin D status. Our aim was to assess the association of adiposity (anthropometric measures as well as dual energy x-ray absorptiometry) with serum 25-hydroxyvitamin D (25-OH-D) and serum PTH levels in a large population-based study including older men and women. METHODS: Subjects were participants of the Longitudinal Aging Study Amsterdam and were aged 65 yr and older. In 453 participants, serum 25-OH-D and PTH were determined, and body mass index, waist circumference, waist to hip ratio, sum of skin folds, and total body fat percentage by dual energy x-ray absorptiometry were measured. RESULTS: After adjustment for potential confounders, higher body mass index, waist circumference, and sum of skin folds were statistically significantly associated with lower 25-OH-D (standardized beta values were -0.136, -0.137, and -0.140, respectively; all P < 0.05) and with higher PTH (0.166, 0.113, and 0.114, respectively; all P < 0.05). Total body fat percentage was more strongly associated with 25-OH-D and PTH (-0.261 and 0.287, respectively; both P < 0.001) compared with anthropometric measures. Total body fat percentage remained associated with 25-OH-D after adjustment for PTH, and with PTH after adjustment for 25-OH-D. CONCLUSION: Precisely measured total body fat is inversely associated with 25-OH-D levels and is positively associated with PTH levels. The associations were weaker if anthropometric measures were used, indicating a specific role of adipose tissue. Regardless of the possible underlying mechanisms, it may be relevant to take adiposity into account when assessing vitamin D requirements.

Adipose Tissue↗

PubMed2005

The impact of change in cognitive functioning and cognitive decline on disability, well-being, and the use of healthcare services in older persons. Results of Longitudinal Aging Study Amsterdam.

The study investigated the impact of change in cognitive functioning and cognitive decline on disability, well-being, and the use of healthcare services among older persons in the Longitudinal Aging Study Amsterdam (LASA). Data were collected from 1,349 subjects, aged 65-85 years, who had scores of 24 and higher on the Mini-Mental State Examination (MMSE) at baseline, over a period of 6 years in three waves. The results indicate that cognitive decline and changes in cognitive functioning in older persons who were either not impaired or only mildly cognitively impaired at baseline have an impact on disability, well-being, and the use of healthcare services. With the aging of the population, the number of persons with cognitive impairment is likely to increase, and appropriate services should be available to them.

Aged↗

PubMed2005

Disaster and associated changes in physical and mental health in older residents.

BACKGROUND: Long-term health consequences of disasters have not been studied extensively, one reason amongst others is that no pre-disaster observation is available. This study focuses on an aeroplane crash on an Amsterdam suburb. The ongoing Longitudinal Aging Study Amsterdam has one pre-disaster and several post-disaster observations, making it possible to study changes in health, taking pre-disaster health characteristics into account. METHODS: Three exposure groups are distinguished: those living within a radius of 1 km from the disaster (initial n=39), those living between a radius of 1 and 2 km from the disaster (initial n=56), and those living in the rest of the city of Amsterdam (initial n=508). Health measures include general health, health in comparison with age peers, functional limitations, disability and cognitive functioning. These measures are based on self-ratings, interviewer observations, or both. RESULTS: Older persons living closest to the disaster area are likely to experience health decline in the wake of a disaster, over and above the health decline that would occur normally with aging. The disaster-associated health decline is small, and most obvious in the ability to perform actions (such as mobility), but is not observed in either disability in daily functioning, nor in self-perceptions of health. Cognitive functioning even shows a short-term improvement. CONCLUSION: These findings suggest substantial resilience in older adults, despite their common health problems.

Accidents, Aviation↗

PubMed2005

Longitudinal characterization of course types of functional limitations.

PURPOSE: Longitudinal data have provided evidence on factors that increase the risk of incidence of functional limitations. However, little insight exists in course types of functional limitations other than simple incidence or recovery. METHODS: This contribution examines the variety of course types across the first three cycles of the Longitudinal Aging Study Amsterdam (n = 3107, initial ages 55 - 85 years, 6-year period covered). Using cluster analysis, course types were determined among both the survivors and the deceased. Multinomial analyses were performed to determine the predictive ability of baseline physical and mental chronic conditions for each course type. RESULTS: Eight course types were distinguished: (1) stable not limited (53%) (2) stable mild (8%) (3) stable severe (3%) (4) gradual increase (4%) (5) delayed increase (5%) (6) not limited, died t3 (8%) (7) increase t1-t2, died t3 (4%) (8) died t2 (15%). Socio-demographic and chronic conditions differentially predicted the course types. Arthritis was predictive mainly of course types not ending in death, cancer of course types ending in death. The other physical and mental conditions were predictive of both. CONCLUSION: These longitudinal data show the usefulness of distinguishing between course types of functional limitations beyond incidence and recovery.

Activities of Daily Living↗

PubMed2005

Change in serum albumin and subsequent decline in functional status in older persons.

BACKGROUND AND AIMS: This study examines whether a three-year change in serum albumin concentration is associated with subsequent decline in functional status in older persons. METHODS: A total of 588 participants from the Longitudinal Aging Study Amsterdam aged 65-85 years were followed for six years. The three-year change in serum albumin was classified in four groups: chronic low (< or =43 g/L at both time points), decrease (decrease of 2.4% or more) from normal to low, decrease but still normal, and stable normal albumin (reference group). During the subsequent three years, absolute change and a decline of one standard deviation or more (termed substantial decline) in functional status was assessed. Functional status was measured in two ways: using performance tests and self-reported functional ability. RESULTS: Substantial decline in functional performance and functional ability was observed in 243 persons (41.3%) and 133 persons (22.6%), respectively. After adjustment for baseline functional status and potential confounders, chronic low albumin and a decrease from normal to low albumin were associated with a greater absolute decline in functional performance and in self-reported functional ability. Using the outcome substantial decline in functional status, only decrease to low serum albumin was associated with decline in functional ability [odds ratio (OR)=1.97; one-sided 95% Confidence Limit (CL)=1.09]. CONCLUSIONS: This study indicates that chronic low serum albumin is a determinant of decline in functional status. However, a decrease in serum albumin from normal to low levels but within the normal range was a stronger determinant of future decline in functional status. Change in serum albumin level within the normal range measured between two points in time may be used as a general marker of future functional decline.

Activities of Daily Living↗

PubMed2005

Impact of depression on disablement in late middle aged and older persons: results from the Longitudinal Aging Study Amsterdam.

The main pathway of the disablement process consists of four consecutive phases: Pathology (presence of disease/injury), Impairments (dysfunctions/structural abnormalities), Functional Limitations (restrictions in basic physical/mental actions), and Disability (difficulty doing activities of daily life, ADL). This study determines the presence of the main pathway of disablement in a cohort aged 55 years and older and examines whether progression of the main pathway of disablement is accelerated in the presence of depression. Based on baseline (T1) and two three-year follow-up interviews (T2 and T3) from the Longitudinal Aging Study Amsterdam (LASA) in a population-based cohort of 1110 Dutch persons, we first analysed the intermediate effect of the different consecutive phases of the disablement process by means of multiple regression, adjusted for covariates. Then, depression was used as interaction term in multiple regression analyses linking the consecutive phases of the disablement process. We found that Impairments mediated the association between Pathology and Functional Limitations, and that Functional Limitations mediated the association between Impairments and Disability. Depression significantly modified the associations between Pathology and subsequent Impairments, and between Functional Limitations and subsequent Disability. In sum, the main pathway of the disablement process was identified in our sample. In addition, we found an accelerating effect of depression, particularly in the early and late stages of the model. Reduction of depression may help slow down the process of disablement for persons who find themselves in those stages of the model.

Activities of Daily Living↗

PubMed2005

Stability and change of neuroticism in aging.

Data from the Longitudinal Aging Study Amsterdam were used to study the relationship between neuroticism and aging. At baseline, cross-sectional analyses of data from 2,117 respondents (aged 55-85 years, M = 70) showed no significant age differences. The magnitude of the 3- and 6-year stability coefficients was high, and 12% of the elderly participants showed a clinically relevant mean level change. Longitudinal multilevel analyses showed a small but statistical significant change with aging, but the mean change was not considered clinically relevant. A U-formed course was found, showing a slight decrease until respondents reached the age of 70. Adjusting the model for physical health-related variables slightly increased the stability. An additional interaction analysis showed that the individual trajectory of neuroticism was not affected by the physical health status. In conclusion, neuroticism remains rather stable in middle and older adulthood, with some apparent increase in late life.

Aged↗