The relation between caffeine intake and menstrual function was examined in 403 healthy premenopausal women who belonged to Kaiser Permanente Medical Care Program in 1990-1991.
A telephone interview collected information about caffeinated beverage intake as well as other lifestyle, demographic, occupational, and environmental factors.
Subjects collected daily urine samples and completed a daily diary for an average of five menstrual cycles.
Metabolites of estrogen and progesterone were measured in the urine, each cycle was characterized as anovulatory or ovulatory, and a probable day of ovulation was selected when appropriate.
Logistic regression and repeated measures analyses were performed on menstrual parameters.
Women whose caffeine consumption was heavy (>300 mg of caffeine per day) had less than a third of the risk for long menses (>8 days) compared with women who did not consume caffeine (adjusted odds ratio=0.30,95% confidence interval 0.14-0.66).
Those whose caffeine consumption was heavy also had a doubled risk for short cycle length (<24 days) (adjusted odds ratio=2.00,95% confidence interval 0.98-4.06) ; this association was also evident in those whose caffeine consumption was heavy who did not smoke (adjusted odds ratio=2.11,95% confidence interval 1.03-4.33). (...)
Mots-clés Pascal : Etats Unis, Amérique du Nord, Amérique, Homme, Femelle, Consommation alimentaire, Caféine, Habitude alimentaire, Analyse biochimique, Oestrogène, Progestérone, Cycle menstruel, Ovulation, Phase folliculaire, Phase lutéale, Cycle menstruel pathologie
Mots-clés Pascal anglais : United States, North America, America, Human, Female, Food intake, Caffeine, Food habit, Biochemical analysis, Estrogen, Progesterone, Menstrual cycle, Ovulation, Follicular phase, Luteal phase, Menstruation disorders
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0190583
Code Inist : 002B20C01. Création : 16/11/1999.