Screening of Undiagnosed Hypothyroidism in Elderly Persons with Diabetes according to Age-Specific Reference Intervals for Serum Thyroid Stimulating Hormone and the Impact of Antidiabetes Drugs.

For patients with subclinical hypothyroidism TSH values were 12.3, 10.4–14.0 (95% CI 11.2–14.8) mU/L in patients with diabetes and 10.9, 9.4–13.8, (95% CI 10.7–13.7) mU/L in persons without diabetes, with a marginal significance ( p = 0.049); and FT4 values were 14.2 ± 0.39 (95% CI 11.5–12.0) pmol/L [1.1 ± 0.03 (95% CI 0.89–0.93) ng/dL] and 14.2 ± 0.3 (95% CI 11.8–14.2) pmol/L [1.1 ± 0.02 (95% CI 0.92–1.1) ng/dL], respectively, p = NS.

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