Motivational symptoms of depression mask preclinical Alzheimer's disease in elderly subjects

BACKGROUND: Althoughthe relationship between depressive disorders and Alzheimer's disease (AD) is debated, there is evidence that depression may be an early symptom of dementia. OBJECTIVE: To evaluate depression features prospectively in elderly subjects with a view to identifying a subgroup affected by preclinical AD. METHODS: We performed a cohort study on cognitive performances with a 12-month follow-up in out-patients referred to the local Neuropsychology Clinic complaining of memory problems. Two hundred and twenty-two consecutive non-demented subjects were studied using a neuropsychological battery and the Beck Depression Inventory (BDI) and assessed again 1 year later for the possible onset of cognitive impairment. Multivariate analysis was performed to detect independent predictors of dementia development among age, education, neuropsychological test scores and BDI scores and subscores. BDI subscores were obtained by dividing items into three domains corresponding to mood-related, somatic and motivation-related symptoms. RESULTS: At the time of the first evaluation, 124 of the 222 subjects were depressed according to DSM-III-R criteria. At 1 year, 31 of the 124 depressed subjects and 2 non-depressed ones had AD according to NINCDS-ADRDA criteria. Stepwise logistic regression analysis indicated that the subjects who went on to develop dementia had significantly higher total BDI scores and motivational BDI subscores. Among depressed subjects, the probability of being diagnosed with dementia during follow-up was significantly associated with a motivational BDI subscore > or = 7 (odds ratio: 3,885, 95% Cl 154-97,902). COMMENT: Close neuropsychological follow-up of depressed elderly subjects complaining of memory failure and showing apathy is recommended to detect the early stage of AD.     

Comorbid anxiety disorders in depressed elderly patients

OBJECTIVE: Anxiety disorders are common in adults with depressive disorders, but several studies have suggested a relatively low prevalence of anxiety disorders in older individuals with depression. This cross-sectional study measured current and lifetime rates and associated clinical features of anxiety disorders in depressed elderly patients. METHOD: History of anxiety disorders was assessed by using a structured diagnostic instrument in 182 depressed subjects aged 60 and older seen in primary care and psychiatric settings. Associations between comorbid anxiety disorders and baseline characteristics were measured. The modified structured instrument allowed detection of symptoms that met inclusion criteria for generalized anxiety disorder in a depressive episode. RESULTS: Thirty-five percent of older subjects with depressive disorders had at least one lifetime anxiety disorder diagnosis, and 23% had a current diagnosis. The most common current comorbid anxiety disorders were panic disorder (9.3%), specific phobias (8.8%), and social phobia (6.6%). Symptoms that met inclusion criteria for generalized anxiety disorder, measured separately, were present in 27.5% of depressed subjects. Presence of a comorbid anxiety disorder was associated with poorer social function and a higher level of somatic symptoms. Symptoms of generalized anxiety disorder were associated with a higher level of suicidality. CONCLUSIONS: Contrary to previous reports, the present study found a relatively high rate of current and lifetime anxiety disorders in elderly depressed individuals. Comorbid anxiety disorders and symptoms of generalized anxiety disorder were associated with a more severe presentation of depressive illness in elderly subjects.     

Personal history of depression and its appearance in Alzheimer's disease

This review of medical charts explored the prevalence of personal history of depression in two groups of geriatric inpatients with current major depression. One group had concurrent Alzheimer's disease (AD) along with major depression, while the other had major depression without dementia. Patients with major depression and no dementia were nearly three times as likely to have had a depressive syndrome in the past compared to patients with major depression and AD. Most depressed AD patients were experiencing their first episode of depression. This suggests that AD may be a risk factor for the first lifetime occurrence of depression. While the pattern of specific depressive symptoms was similar between groups, patients without AD more often reported symptoms with a substantial cognitive element (eg thoughts of death, worthlessness) and patients with AD demonstrated more non-verbal manifestations of depression (eg tearfulness, sad face). A diathesis–stress model that takes into account the neuropathological and psychological concomitants of both depression and AD may be a useful framework for understanding how these two disorders influence one another.     

Symptoms of anxiety and depression in the course of cognitive decline

BACKGROUND/AIMS: Anxiety and depression are common inpatients with cognitive decline and Alzheimer's disease (AD), and recognition and treatment of these symptoms can improve their quality of life. The present study investigates anxiety and depression in different phases of cognitive decline. METHODS: The sample consisted of five groups of elderly people in different phases of cognitive decline; four from a community-based sample (Longitudinal Aging Study Amsterdam), and one group of elderly people diagnosed with AD. ANOVAs were performed to investigate group differences in the severity and prevalence of anxiety and depression, and comorbid anxiety and depressive symptoms. RESULTS: The prevalence rates of anxiety, comorbid anxiety and depressive symptoms and depressive symptoms follow a pattern of an increasing prevalence as cognitive performance declines and a decrease in the prevalence when cognitive functioning is severely impaired. AD patients report fewest anxiety symptoms. CONCLUSION: We found that the prevalence of anxiety symptoms, depressive symptoms and comorbid anxiety and depressive symptoms seems to increase in the early phase of cognitive decline, and decreases as cognitive functioning further declines. Elderly diagnosed with AD report less anxiety as expected, probably due to lack of insight caused by AD.     

Immediate causes of death of demented and non-demented elderly

Objective – To investigate the immediate causes of death, in autopsied demented and non-demented elderly. Design – Retrospective clinicopathologic correlations. Setting – Acute and intermediate care geriatric hospital. Participants – 342 hospitalized demented and non-demented elderly (mean age 84.94±6.9 years) who underwent consecutive post-mortem examinations: 120 demented patients with either vascular dementia (VaD, n =34), mixed dementia (MD, n =65) or Alzheimer's disease (AD, n =21) neuropathologically confirmed and 222 non-demented elderly. Results – Primary causes of death were similar in both demented and non-demented patients; the commonest were cardiovascular disease and bronchopneumonia. Cardiac causes of death and especially cardiac failure were more frequent in VaD than in AD or MD (respectively P =0.027 and 0.005). Dementia was an underlying but never a primary cause of death. Conclusions – Immediate causes of death are similar in elderly demented and non-demented patients.     

Depressive illness in Parkinson’s disease – indication of a more advanced and widespread neurodegenerative process?

Objective –  The aims were to study if the type and complexity of Parkinsonian symptoms, as well as treatment, could be related to the occurrence and severity of later depressive symptoms. Furthermore, the aim was to study if there is a different depressive symptomatology in Parkinson's disease (PD) patients compared with depressive illness in an age-matched group of patients with major depression but without Parkinson's disease.
Methods –  Eleven PD-patients with major depression (MD) were compared to 14 PD-patients without depression and to 12 MD patients without PD.
Results –  PD patients who later developed a depressive illness were younger at the debut of PD than patients without depression ( P < 0.05). At inclusion the depressed PD patients were more disabled than PD patients without depression with higher level in the H&Y scale ( P <0.05), and they had more involuntary movements according to Unified Parkinson's Disease Rating Scale (UPDRS IV) ( P < 0.01). A family history of depression was found in one third of the depressed non-parkinsonian patients but in none of the PD groups. Sleep disturbances were significantly more common among depressed PD patients than in PD patients without depression but even more common in depressed patients without PD.
Conclusions –  Depressed PD patients had a longer duration of PD and more severe motor symptoms than PD patients without depression, although tremor as an initial symptom seemed to be more common in PD without a later depression. It cannot be excluded that depression in PD reflects a more advanced and widespread neurodegeneration, including serotonergic as well as dopaminergic neurons. Sleep disturbances is common and could be overlooked as an expression of depression.     

Psychosocial risk factors and Alzheimer's disease: the associative effect of depression,sleep disturbance,and anxiety

ABSTRACT

Objectives: Alzheimer's disease (AD) dementia is a neurodegenerative condition, which leads to impairments in memory. This study predicted that sleep disturbance, depression, and anxiety increase the hazard of AD, independently and as comorbid conditions.

Methods: Data from the National Alzheimer's Coordinating Center was used to analyze evaluations of 12,083 cognitively asymptomatic participants. Survival analysis was used to explore the longitudinal effect of depression, sleep disturbance, and anxiety as predictors of AD. The comorbid risk posed by depression in the last two years coupled with sleep disturbance, lifetime depression and sleep disturbance, clinician-verified depression and sleep disturbance, sleep disturbance and anxiety, depression in the last two years and anxiety, lifetime depression and anxiety, and clinician-verified depression and anxiety were also analyzed as predictors of AD through main effects and additive models.

Results: Main effects models demonstrated a strong hazard of AD development for those reporting depression, sleep disturbance, and anxiety as independent symptoms. The additive effect remained significant among comorbid presentations.

Conclusion: Findings suggest that sleep disturbance, depression, and anxiety are associated with AD development among cognitively asymptomatic participants. Decreasing the threat posed by psychological symptoms may be one avenue for possibly delaying onset of AD.     

Gender differences of depressive symptoms in depressed and nondepressed elderly persons.

OBJECTIVES: Women suffer more frequently from major depression and depressive symptoms than men. The somatic and the atypical subtype of depression seem to be more prevalent in women. However, few studies investigated gender differences of depressive symptoms in the elderly. These gender differences in the elderly will be investigated in the present study. METHODS: In the course of a family study 236 subjects with a lifetime diagnosis of major depression aged > 50 years and 357 control subjects from the general population matched for age and gender were questioned using the Composite International Diagnostic Interview (CIDI). Chi-square tests were used to compare the individual depressive symptoms between men and women and logistic regression analyses were performed to account for the subjects' age, cognitive performance, family and employment status. RESULTS: Women in the general population suffered from more depressive symptoms than men and had more appetite disturbance and joylessness. These gender differences could be entirely explained by gender differences in the family and the employment status. Men and women with a major depressive disorder presented with a distinct profile of symptoms that could not be explained by psychosocial factors: elderly depressed women presented with more appetite disturbances and elderly depressed men with more agitation. CONCLUSION: Major depression in the elderly presents with partially different symptoms in men and women. The results suggest that the gender differences in the symptoms of major depression in the elderly reflect gender differences in the perception and the expression of depressive syndromes.     

Factors associated with depressive symptoms in non-demented community-dwelling elderly.

OBJECTIVE: We examined the risk for depressive symptoms associated with age, education, ethnicity, gender, marital status, apolipoprotein E genotype (APOE) and memory complaints among non-demented elderly (> or = 60 years). DESIGN: Cross-sectional study of geriatric patients recruited from a free memory screening offered to the community. SAMPLE: This investigation included 506 community-residing elderly subjects who were screened for cognitive impairment and classified as non-demented based on age and education-adjusted Folstein Mini-Mental State Exam (MMSAdj) scores of 24 or greater. RESULTS: The prevalence of significant depressive symptoms (Hamilton Depression Rating Scale > or = 12) was 12.1% (N = 61). Increased risk for depression was associated with female gender (OR = 2.3; 95% CI = 1.1-4.8; p < 0.05), Cuban American ethnicity (OR = 4.9; 95% CI = 2.3-10.4; p < 0.0001) and memory complaints (OR = 1.3; 95% CI = 1.2-1.4; p < 0.0001). The APOE allele frequencies in the current sample were 0.07, 0.80 and 0.13 for the epsilon 2, epsilon 3 and epsilon 4 alleles, respectively. CONCLUSIONS: The results suggest that signs and symptoms of depression are common among non-demented elderly subjects in the community. In this study, mood disturbances were associated with Cuban American ethnicity, female gender and more memory complaints. Factors that were not confirmed by this study include age, education, marital status and APOE genotype. The observed APOE, epsilon 4 allele frequency of 0.13 supports the normal cognitive classification of the sample.     

Depressive symptom profile in Parkinson's disease: a comparison with depression in elderly patients without Parkinson's disease

OBJECTIVE: Depression is a common neuropsychiatric syndrome in Parkinson's disease (PD), and may be etiologically related to the neurochemical changes accompanying this disease. It is still unclear whether the disturbances of neurotransmitter activities lead to a specific profile of depressive symptoms, that is characteristic for PD and differs from that in depressed patients without PD. METHOD: We compared the individual depressive symptoms of 145 non-demented depressed patients with PD and 100 depressed patients without PD by comparing item scores on the Montgomery-Asberg Depression Rating Scale by way of MANCOVA. RESULTS: The severity of depression and the level of cognitive functioning in depressed PD patients were comparable with that of depressed control subjects. However, patients with PD showed significant less reported sadness, less anhedonia, less feelings of guilt and, slightly less loss of energy, but more concentration problems than depressed control subjects. CONCLUSION: The profile of depressive symptoms in PD differs from that in depressed subjects without PD. This finding is important for the conceptualisation and clinical diagnosis of depression in PD.     

The specificity of depressive symptoms in patients with Alzheimer's disease

OBJECTIVE: This study assessed the specificity of depressive symptoms in patients with Alzheimer's disease and examined the discrepancies between patient and caregiver symptom reports. METHOD: The study group was composed of a series of 233 patients with Alzheimer's disease, 47 patients with depression but without dementia, and 20 healthy comparison subjects; the latter two groups were comparable in age with the patients with Alzheimer's disease. The patients and comparison subjects received a comprehensive psychiatric evaluation, which included administration of the Hamilton Depression Rating Scale and the Structured Clinical Interview for DSM-IV. RESULTS: Patients with Alzheimer's disease with a score of 2 or higher on the "depressed mood" item of the Hamilton depression scale, as scored by their respective caregivers, comprised a group with depressed mood (N=92), whereas patients who scored 0 on this item comprised a group without depressed mood (N=62). A statistical comparison of the scores on the remaining Hamilton depression scale items (2-16) between the Alzheimer's disease patients with and without depressed mood revealed significant differences on all items, except "loss of appetite." However, there were no significant differences on any single Hamilton depression scale item between the Alzheimer's disease patients without depressed mood and the age-comparable healthy comparison subjects. CONCLUSIONS: Depressive symptoms are not widespread among patients with Alzheimer's disease but are significantly related to an underlying depressed mood. Patients with Alzheimer's disease may not be fully aware of the extent of their depressive symptoms.     

Subsyndromal symptomatic depression: a new concept

Although DSM-IV acknowledged the clinical significance of some subthreshold forms of unipolar depression, such as minor depression (MinD) and recurrent brief depression (RBD), clinicians continued to struggle with the concept of "subthreshold" depression. A substantial number of patients continued to present with depressive symptoms that still did not satisfy any DSM-IV diagnosis. Generally, these patients failed to complain of anhedonia and depressed mood, a criterion that DSM-IV mandates for any diagnosis of depression. Therefore, researchers reexamined the question of whether this cluster of depressive symptoms, in the absence of anhedonia and depressed mood, was clinically significant. Some researchers labeled this cluster of symptoms, "subsyndromal symptomatic depression" (SSD). Specifically, SSD is defined as a depressive state having two or more symptoms of depression of the same quality as in major depression (MD), excluding depressed mood and anhedonia. The symptoms must be present for more than 2 weeks and be associated with social dysfunction. Using Medline Search, the authors reviewed the literature on the epidemiology, demographics, clinical characteristics, and psychosocial impairment of SSD. SSD is found to be comparable in demographics and clinical characteristics to MD, MinD, and dysthymia. SSD is also associated with significant psychosocial dysfunction as compared with healthy subjects. Further; it has significant risk for suicide and future MD. Few studies have been conducted on the treatment of SSD. The high prevalence of SSD, the significant psychosocial impairment associated with it, and the chronicity of its course make subsyndromal symptomatic depression a matter for serious consideration by clinicians and researchers.     

皮质下缺血性抑郁和皮质下缺血性痴呆患者的抑郁症状分析

目的 比较皮质下缺血性抑郁和皮质下缺血性痴呆患者的抑郁症状。方法 连续收集2008年9月至2011年3月间符合入选标准的70例皮质下缺血性血管病（subcortical ischemic vascular disease,SIVD）患者,根据抑郁和痴呆的诊断标准及17项版汉密尔顿抑郁量表（Hamilton Rating Scale of Depression,HRSD）和简易智能状态检查（Mini-Mental State Examination,MMSE）分为无抑郁或痴呆组（29例）、抑郁组（19例）、痴呆组（12例）、抑郁伴痴呆组（10例）。应用HRSD对各组患者的抑郁症状进行评价,分析比较各组患者的抑郁症状的表现特点。结果 4组患者的年龄、性别比、社会经济因素及血管性危险因素的差异无统计学意义。就发生率,抑郁组以抑郁情绪（17例,89.5%）、精神性焦虑（16例,84.2%）、躯体性焦虑（15例,78.9%）最突出,而痴呆组和抑郁伴痴呆组以阻滞（8例,66.6%和9例,90.0%）最突出。就严重程度,除睡眠障碍外,抑郁组以焦虑躯体化症状[0.8（0.2,2）]最严重,而痴呆组和抑郁伴痴呆组以阻滞症状［1（0.3,1.8）和1.1（0.3,2）］最严重。抑郁组的抑郁程度较抑郁伴痴呆组更高（P=0.026）、焦虑躯体化更突出（P<0.01）。结论 皮质下缺血性抑郁和皮质下缺血性痴呆及两者共存的患者的情绪损害特点存在着差异,皮质下缺血性抑郁较偏向于经典抑郁症所致情绪障碍,皮质下缺血性痴呆和皮质下缺血性抑郁伴皮质下缺血性痴呆的患者则较偏向于皮质下缺血性病变所致情绪障碍。     

Advanced parental age: a risk factor for Alzheimer's disease or depression in the elderly?

BACKGROUND: Advanced parental age has been suggested as a risk factor for Alzheimer's disease (AD) as well as for other psychiatric disorders. In the present investigation, a sample of gerontopsychiatric patients was examined for a possible parental age effect. STUDY POPULATION AND METHODS: Eighty-three patients with AD, 154 elderly patients with depressive episodes, and 48 comorbid patients (AD and depressive episode) as well as 107 age-matched healthy control subjects from the general population were included in the investigation. Information on the years of birth of the parents was derived from personal or family history information. RESULTS: The mean maternal and paternal ages at the time of birth of the index subject were not significantly different for the different diagnostic subgroups or for the control sample. CONCLUSION: There was no evidence in our sample that advanced parental age increases the risk of AD or depression in the elderly.     

EEG findings in depressive pseudodementia and dementia with secondary depression

We report EEG findings in 33 elderly patients with mixed symptoms of depression and dementia, followed longitudinally to confirm diagnosis. Two groups of patients, dementia with depressive features (mixed-DEM, group I, n = 23) and patients with depressive pseudodementia (mixed-DEP, group II, n = 10), were defined. In addition, we also included, for comparison purposes, 35 patients with probable AD without depressive features (group III), 23 patients with major depression without cognitive impairment (group IV), and 61 healthy elderly controls (group V). We found significant group differences on waking EEGs between those mixed patients who did well after treatment for depression (depressive pseudodementia) compared to patients having dementia with secondary depression. The differences paralleled those between the 'pure' groups of demented and depressed patients. In patients with either depression or depressive pseudodementia, the EEG was usually normal or showed only mild abnormalities. In contrast, the majority of patients with either dementia or dementia with secondary depression had abnormal EEGs, with approximately one-third having moderate (or severe) abnormalities. Although the EEG was usually normal or only mildly abnormal in patients with pseudodementia or depression, these groups (II and IV) did show a significant slowing of the dominant posterior rhythm compared to controls. They also had a higher percentage of generalized abnormal EEGs than controls and this difference was significant between group IV (depression) and controls.     

Depression and major depressive disorder in patients with Parkinson's disease

The prevalence of depression in Parkinson's disease (PD) varies greatly. In this study, we investigated major depressive disorder (MDD) and depressive symptoms without MDD in patients with PD. The psychopathological characteristics of depressive symptoms were assessed by a psychiatric interview. A total of 105 Japanese patients with PD without dementia were included. The Japanese version of the Beck Depression Inventory‐II (BDI‐II) with a cutoff score of 13/14 was used to screen for depression. Using a structured interview, a comprehensive psychiatric evaluation of patients with BDI‐II scores >13 (high BDI patients) was completed using the criteria of the Diagnostic and Statistical Manual of Mental Disorders (DSM)‐IV‐TR. Forty patients (38%) had a BDI‐II >13, but 29 did not show any depressed mood. Five cases met the criteria for MDD (three current, two past) and one patient was diagnosed with minor depressive disorder. A slight depressed mood that was associated with worrying about PD was seen in 6 of 34 patients without any depressive disorder and fluctuated with aggravation of PD symptoms in two of these patients. For the diagnosis of MDD, the number of positive items from the DSM‐IV‐TR definition of MDD is most important and useful for differentiating MDD and non‐MDD. The low‐prevalence rate of MDD in our patient population suggests that PD may be a psychological stressor for MDD, but does not necessarily induce MDD. © 2009 Movement Disorder Society     

A family study of Alzheimer disease and early- and late-onset depression in elderly patients

BACKGROUND: The substantial symptomatic overlap between depression and dementia in old age may be explained by common genetic vulnerability factors. METHODS: We investigated this idea by comparing the occurrence of both disorders in first-degree relatives of 78 patients with Alzheimer disease (AD), of 74 with late-onset depression (onset age of > or = 60 years), of 78 with early-onset depression, of 53 with comorbid lifetime diagnoses of AD/depression, and of 162 population control subjects. Diagnostic information on their 3002 relatives was obtained from structured direct assessments and from family history interviews. RESULTS: The 90-year lifetime incidence of primary progressive dementia was significantly higher in relatives of patients with AD (30%) and comorbid AD/depression (27%) than in relatives of patients with early-onset (21%) or late-onset (26%) depression, or of controls (22%) (P =.01). Lifetime incidence of depression was significantly higher in relatives of patients with early-onset depression (13%) than in relatives of patients with AD (10%) or controls (9.0%) (P =.006). Lifetime incidence of depression was similar in control relatives and in relatives of those patients with comorbid AD/depression (8.6%). Relatives of patients with late-onset depression also showed similar occurrence of depression until the age of 80 years, but the figure increased sharply thereafter to 19.1% by the age of 90 years. CONCLUSIONS: Primary progressive dementia and early-onset depression represent clinical entities with distinct inheritance. Late-onset depression does not share substantial inheritance in common with dementia or with early-onset depression, but does show modest familial clustering.     

Behavioral and psychological symptoms of dementia in untreated Alzheimer's disease patients

Background: To ascertain the prevalence of psychotic symptoms and behavioral disturbances of dementia patients is useful for families and health care professionals in order to anticipate the progression of Alzheimer’s disease (AD) and to recognize deterioration. This study aimed to determine whether behavioral and psychological symptoms of dementia (BPSD) are related to severity of untreated AD. Methods: Two hundred and two patients were classified into three groups by Functional Assessment Staging score as follows: mild group (n = 92) was at stages 3 or 4; moderate group (n = 80) was at stage 5; and severe group (n = 30) was at stages 6 or 7. We then compared the prevalence of BPSD among the groups. Psychiatric symptoms of BPSD were defined as including hallucinations, delusions, delusional misidentification syndrome and depressive mood; while behavioral disturbances included physical aggression, wandering, adverse sleep and hyperphagia. Results: In our study, depressive mood, physical aggression and wandering were statistically associated with the severity of AD. Conclusion: These results are meaningful for caregivers in helping them to understand the anticipated progression of AD and to recognize deterioration. In the care of AD patients, it is necessary to be aware of characteristics of each BPSD.     

Medication use and nonadherence to psychoactive medication for mental health problems by community-living canadian seniors with depression

Objectives: To determine the relation between level of depression and psychoactive medication use and nonadherence in Canadian seniors, given that late-life depression is a common, serious mental health problem in Canada. Methods: Canadian Community Health Survey-Mental Health and Well-Being respondents aged 65 years and older (n = 7736) comprised the study sample. Using the Composite International Diagnostic Interview to assess depressive symptoms, we created 4 depression levels to capture a spectrum of depressive disorders and (or) symptoms: major depression, comorbid major depression, depressive symptoms, and no depressive symptoms. Psychoactive medications assessed included sleep aids, anxiolytics, and mood stabilizers and (or) antidepressants (AD). Nonadherence was defined as either not taking medication as recommended or taking medication at a lower dosage than prescribed. Results: In total, 22.5% of respondents took psychoactive medication for a mental health problem in the previous 12 months. Psychoactive medication use was 46.8% for major depression, 43.1% for comorbid major depression, 34.0% for depressive symptoms, and 17.6% for no depressive symptoms. Rates of psychoactive medication use ranged from 46.5% of those with major depression, to 17.6% of those with no depressive symptoms. Overall, the rate of nonadherence to psychoactive medication was 31%; rates were highest among those with depressive symptoms (37.4%) and lowest among those with no depressive symptoms (27.4%). All 3 depressive categories were associated with greater odds of use and nonadherence. Conclusion: All 3 depression categories were associated with increased use of and nonadherence to psychoactive medication; however, rates of AD and (or) mood stabilizer use for clinically significant depression were low.