Thyroid function in seasonal affective disorder.
Morning serum levels of triiodothyronine (T3), free thyroxine (F-T4) and thyroid-stimulating hormone (TSH) were measured in Winter-Seasonal Affective Disorder patients in nondepressed state in summer and before and after light treatment in winter. Practically all patients had hormone levels well within the reference ranges. T3 and F-T4, but not TSH, were significantly higher in winter than in summer; this is considered a normal phenomenon. There was no significant correlation between hormone levels and severity of winter depression. Light treatment did not alter serum hormone levels.
Lingjaerde
O
O
Gaustad Hospital, Oslo, Norway.
Reichborn-Kjennerud
T
T
Haug
E
E
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007030:Hypothalamo-Hypophyseal System / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D010789:Phototherapy; D016574:Seasonal Affective Disorder / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology / Q000628:therapy; D012621:Seasons; D013960:Thyroid Function Tests; D013961:Thyroid Gland / Q000503:physiopathology; D013963:Thyroid Hormones / Q000097:blood*; D013972:Thyrotropin / Q000097:blood; D013973:Thyrotropin-Releasing Hormone
D013963:Thyroid Hormones; D013973:Thyrotropin-Releasing Hormone; D013972:Thyrotropin