This association was attenuated by waist circumference and HOMA-IR, but persisted in fully adjusted model (P for trend <0.05) in which, for the lowest compared with the highest quartile of FSH, the odds ratios of prediabetes and diabetes were 1.93 (95 % CI 1.21–3.08; P < 0.01) and 3.02 (95 % CI 1.10–8.31; P < 0.05), respectively. Here, BRD2 is linked to diabetes mellitus.