“…18,19 Women with diabetes were considered to have 'secondary diabetes' if they were also diagnosed with druginduced diabetes, hemochromatosis, hepatitis, liver cirrhosis, hyperthyroidism, polycystic ovary syndrome, or gestational diabetes within the 12 months before T2D diagnosis. 20 Information on use of metformin or use of other classes of antidiabetic medications was obtained from baseline and follow-up questionnaires. 21 At baseline, women were asked to report the age at first use, the number of days per week, times per day on days they took it, and total years or months of use.…”