Table 2.

Mean of BMI by the categories of AAFM among women

	Mean	SD	95% CI		Minimum	Maximum
			Lower bound	Upper bound
Age at first marriage (years)	16.57	2.83	16.50	16.63	10	36
Mean of BMI for each category of AAFM
Child marriage (AAFM < 18 year) (4991(69.0%)	22.46	3.86	22.35	22.57	15.01	39.45
Not-child marriage (AAFM ≥ 18 year) (2244, 31.0%)	23.27	4.19	23.10	23.44	15.12	38.78
T-test value = 6.950					p-value = 0.001
AAFM < 16 (2723, 37.6%)	22.45	3.85	22.35	22.63	15.01	38.14
16 ≤ AAFM ≤ 18 (2268, 31.4%)	22.47	3.88	22.27	22.58	15.01	39.45
AAFM > 18(2244, 30.9%	23.28	4.09	22.68	23.90	15.12	38.78
F-test value = 82.457					p-value = 0.001

N.B: AAFM: Age at first marriage