Table 3.

Associations between characteristics of forty-eight urban mothers during pregnancy and birth weight (g) by univariate and multiple regression analyses

Maternal characteristic	Univariate			Multivariate
	β	95 % CI	P	β	95 % CI	P
Infant sex male = 0, female = 1	−88⋅5	−273⋅7, 96⋅8	0⋅341
Gestation at birth, weeks	102⋅2	34⋅6, 169⋅8	0⋅004	112⋅5	48⋅3, 176⋅8	0⋅001
Parity	178⋅7	−1⋅3,358⋅8	0⋅052	235⋅1	70⋅5, 400⋅0	0⋅006
Height, cm	10⋅94	−7⋅42, 29⋅30	0⋅237
Weight, kg
17 weeks	2⋅13	−9⋅90, 14⋅16	0⋅724
26 weeks	4⋅73	−7⋅23, 16⋅69	0⋅423
34 weeks	4⋅07	−7⋅44, 15⋅59	0⋅480
Post-delivery	5⋅69	−6⋅47, 17⋅84	0⋅350
Weight gain, 17–34 weeks	16⋅65	−16⋅21, 49⋅51	0⋅313
Total body water, kg by D2O
17 weeks	2⋅47	−30⋅67, 35⋅61	0⋅881
34 weeks	6⋅39	−19⋅56, 32⋅34	0⋅622
Water gain, 17–34 weeks, kg	16⋅65	−31⋅20, 64⋅50	0⋅487
Maternal dry weight, kg
17 weeks	3⋅44	−13⋅18, 20⋅07	0⋅679
34 weeks	5⋅88	−10⋅78, 22⋅53	0⋅481
Dry weight gain, 17–34 weeks	9⋅13	−23⋅44, 41⋅70	0⋅575
% Water/total weight
Water/total weight %, 17 weeks	−3⋅32	−26⋅30, 19⋅67	0⋅773
Water/total weight %, 34 weeks	−4⋅50	−25⋅71, 16⋅71	0⋅671
Water/weight gain %, 17–34 weeks	0⋅64	−2⋅28, 3⋅56	0⋅661

Bold text indicates statistical significance with a P value <0·05.