This cross-sectional study was to assess the relationship between RA, breastfeeding, and also use of oral contraceptives, in a population of older women from South China, where cultural habits differ from those in the West, where most previous studies were conducted. (sciencedaily.com)
Questionnaires were used to ascertain sociodemographic history, disease and lifestyle history, obstetric history, breastfeeding history, and history of use of oral contraceptives. (sciencedaily.com)
The researchers statistically corrected for factors known to reduce fertility, such as smoking, recent use of oral contraceptives and obesity. (sciencedaily.com)