Table 2.

Association between obesity or overweight (obesity/overweight vs. normal/underweight) and age at menarche, using multivariate logistic regression

	Odds ratio (95%CI)
Age at menarche	Model 1	Model 2	Model 3	Model 4
Less than 12 years	Ref.	Ref.	Ref.	Ref.
12 to less than 13 years	0.72 (0.54-0.96)	0.71 (0.53-0.96)	0.73 (0.54-0.99)	0.71 (0.52-0.97)
13 years or above	0.64 (0.48-0.84)	0.64 (0.49-0.85)	0.67 (0.50-0.88)	0.65 (0.49-0.87)
P-value	0.005	0.006	<0.001	0.012

Model 1: unadjusted. Model 2 adjusted for Group 1 (i.e. area of residence, living with both parents vs. single parent or a relative). Model 3: adjusted for Group 1 and Group 2 (i.e. presence of disease condition that limits physical activity, amount of running/jogging over the past year, number of hours spent reading/doing homework during weekdays). Model 4: adjusted for Group 1, Group 2 and Group 3 (frequency of dinners prepared away from home, frequency of fast-food intake, frequency of eggs intake, number of servings per day (divided into tertiles) of pasta and rice, number of servings per day of salty snacks and sweets).