Self-reported menopausal symptoms in a racially diverse population and soy food consumption

ObjectivesEvaluate the association of self-reported vasomotor symptom (VMS) frequency with race/ethnicity among a diverse midlife US population and explore menopause symptom differences by dietary soy isoflavone (genistein + daidzein) consumption.Study designCross-sectional population-based study of peri- and postmenopausal women, ages 45–58.OutcomesRecent VMS frequency, VMS ever; recent symptom bother (hot flashes, night sweats, headache and joint-ache).ResultsOf 18,500 potentially eligible women, 9325 returned questionnaires (50.4% response); 3691 were excluded (premenopausal, missing data, taking hormones). Of 5634 remaining women, 82.1% reported hot flashes ever, 73.1% reported night sweats ever; 48.8% and 38.6% reported recent hot flashes or night sweats, respectively. Compared with White women, Chinese, Japanese, Vietnamese, other Asian (each p < 0.001) and Filipino (p < 0.01) women less commonly reported ever having hot flashes; Asian women less commonly reported recent VMS bother (p < 0.001). Black women more commonly reported hot flashes ever (p < 0.05) and recent VMS bother (p < 0.05). Compared with non-Hispanic White women, Hispanic women were less likely to report hot flashes (p < 0.05) or night sweats (p < 0.001) ever. Women were classified by isoflavone consumption: (1) none (n = 1819), (2) 0.01–4.30 mg/day (n = 1931), (3) 4.31–24.99 mg/day (n = 1347) and (4) ≥25 mg/day (n = 537). There were no group differences in recent VMS number/day: (1) 7.0 (95% CI 6.5, 7.5); (2) 6.4 (95% CI 6.0, 7.1); (3) 7.0 (95% CI 6.3, 8.2); and (4) 6.8 (95% CI 6.1, 7.7).ConclusionsMenopausal symptoms, independent of isoflavone intake, varied considerably by race/ethnicity and were least common among Asian races.