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- W47449210 abstract "The authors of the source article emphasize the clinical tendency to screen for, detect and treat for thyroid dysfunction in very elderly patients, in which it is a fairly common disorder, often with occult or no symptoms. Published evidence is conflicting on the benefit, if any, of such a program. Accordingly, they devised a prospective, population-based study to determine outcomes, including survival outcome, based on serum levels of thyroid-stimulating hormone (TSH) and thyroxine.A cohort of 558 subjects who had their 85th birthday between September 1997 and September 1999 was enrolled after consent of the subject and screening examination that included serum TSH and thyroxine levels. This represented a 79% sample of all 85-year-old residents of Leiden, the Netherlands. Follow up was complete for survival 4 years to the subject's 89th birthday or prior death, although 70 subjects refused the annual re-examination. Thyroid function, disability, cognitive function and number of chronic diseases were analyzed, in addition to mortality, through Cox regression and other statistical methods.In 67 subjects with abnormally high TSH (>4.8 mIU/ L), the mean annual mortality rate was derived as 64 deaths per 1000 per year. In the 491 subjects with normal TSH or low TSH (<0.3 mIU/L), the mean annual mortality rate was derived at 114 per 1000 per year. Laboratory evidence of hypothyroidism (initially low serum thyroxine) was found in only 37 of the 67 subjects.In the 13% of elderly subjects in Leiden with abnormally high serum TSH levels, the mean annual mortality rate was significantly lower than the mortality rate in the 87% of the elderly patients with normal or low serum TSH. The significance is based on 95% confidence levels of the Poisson distribution. The rate in the group with high TSH levels had 16 deaths in 264 person-years of follow up (FU). The majority with normal or low TSH levels had 193 deaths in 1698 person-years of FU." @default.
- W47449210 created "2016-06-24" @default.
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- W47449210 date "2006-01-01" @default.
- W47449210 modified "2023-09-23" @default.
- W47449210 title "Mortality in a complete 4-year follow up of 85-year-old residents of Leiden, classified by serum level of thyrotropin and thyroxine." @default.
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