A migrant study of pubertal timing and tempo in British-Bangladeshi girls at varying risk for breast cancer.

The median age of menarche occurred earlier with increasing BMI z -scores, but the trend did not reach statistical significance (Figure 3 ; HR (95% CI): Q1 = 1.0, Q2 = 1.2 (0.8, 1.8), Q3 = 1.1 (0.9, 1.5), Q4 = 1.2 (1.0, 1.4); P -trend = 0.50).

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