Women in the study were asked about how many caffeinated and decaffeinated beverages they drank including sodas and teas but most of the caffeine the women drank was from coffee.

受调查的女性被问及她们每天喝多少含咖啡因和不含咖啡因的饮料，包括苏打水和茶，她们喝到的咖啡因多数来自咖啡。