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The 24-hour patterns of body temperature and plasma thyrotropin (TSH) were measured in eight bipolar patients in both depressed and recovered (after 3 weeks of treatment) states and in eight normal control subjects. Clear circadian patterns were detected for both temperature and TSH. Nocturnal body temperature was increased and the nocturnal surge of TSH was blunted during depression; these abnormalities were corrected after recovery. The inverse relationship between changes in body temperature and TSH levels at night suggests that changes in thermoregulation may be responsible for the neuroendocrine disturbance and may play a role in the pathophysiology of depression.

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The objective of this study was to demonstrate the cost effectiveness of long term maintenance treatment with citalopram versus standard therapy (defined as short term antidepressant treatment) in patients with major depression in Germany. We chose doxepin, amitriptyline and trimipramine as standard therapy because these drugs are the leading antidepressants in that country. A Markov process analysis was used to model health status and economic outcomes as they accrued over a 1-year follow-up period. The main outcome measures were time without depression, direct costs and indirect costs (work days lost). All costs were in 1993 Deutsche marks. The clinical data were obtained from the published literature and US clinical practice guidelines; the associated unit costs of the medical resources used were derived from official German tariff lists. The results show that, compared with standard therapy, long-term maintenance treatment with citalopram is associated with a mean increase in time without depression of 7.9% (8.2 vs 7.6 months). The total costs of maintenance treatment with citalopram were substantially lower than with standard therapy (DM7985 vs DM11,948 per patient per year. In addition, both the direct and indirect costs of maintenance treatment with citalopram (DM3764 vs DM4221 per patient, respectively) were lower than with standard therapy (DM4577 vs DM7371 per patient, respectively). In conclusion, the study demonstrates that one year's maintenance treatment with citalopram is both more effective and less costly than standard therapy in the treatment of patients with major depression.

To assess the economic burden of Alzheimer's disease (AD), we carried out a cross-sectional prevalence cost-of-illness study in France. Fifty-one probable AD patients (NINCDS-ADRDA) actually treated in ambulatory care were recruited in two university outpatient centers. Demographic, clinical (including actual Mini-Mental State Examination scores), and economic data were collected by clinical investigators and trained interviewers. Total costs included actual expenditures such as direct medical costs and direct nonmedical costs, as well as indirect costs (loss of earnings due to loss of productivity). Cost valuation was based on the societal perspective using an opportunity costing approach. We found that indirect costs represented a significant portion of total costs (36%-40%). In terms of expenditures, patients and caregivers were found to bear the major part of AD total costs. We found a positive and significant correlation between disease severity and costs. Our findings support the hypothesis of a relationship between disease evolution and healthcare costs.