title: Seasonal variation of serum high density lipoprotein cholesterol levels in men.
abstract: To determine if there are seasonal variations in serum high density lipoprotein cholesterol (HDL-C), the concentration of HDL-C was measured monthly for 12 consecutive months in 31 healthy men and 24 male inpatients with schizophrenia. In addition to HDL-C, total cholesterol (TC) and triglyceride (TG) concentrations in serum were assayed, and low density lipoprotein cholesterol (LDL-C) was estimated by calculation. Mean serum HDL-C levels of schizophrenic patients were significantly low compared with those of healthy controls, 35 +/- 12 and 49 +/- 11 mg/dl, respectively. The TC levels of schizophrenic patients were significantly higher in January and March as compared with August. The HDL-C levels in summer and autumn were significantly lower than those in winter and spring in both healthy men and schizophrenic patients. The concentration of LDL-C was significantly high in September and October as compared with April in healthy men. In patients with schizophrenia, LDL-C level seemed higher in January and March as compared with August.
mesh_terms: D000328:Adult; D002784:Cholesterol / Q000097:blood*; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D006801:Humans; D008075:Lipoproteins, HDL / Q000097:blood*; D008077:Lipoproteins, LDL / Q000097:blood; D008297:Male; D008875:Middle Aged; D012559:Schizophrenia / Q000097:blood*; D012621:Seasons; D014280:Triglycerides / Q000097:blood
chemical_list: D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D008075:Lipoproteins, HDL; D008077:Lipoproteins, LDL; D014280:Triglycerides; D002784:Cholesterol