Fig. 1From: Age at menarche and risk of gestational diabetes mellitus: a population-based study in Xiamen, ChinaAssociation of age at menarche and GDM. Odds ratios (ORs) and 95% CIs derived from restricted cubic spline regression. Reference point is 14 years at menarche. ORs were adjusted for the same variables as model 4 in Table 2Back to article page