Table 2.

Associations between characteristics of fifty-one rural 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)	43⋅4	−160⋅2, 246⋅9	0⋅670
Gestation at birth, weeks	89⋅9	16⋅0, 163⋅8	0⋅018	237⋅6	96⋅8, 378⋅4	0⋅001
Parity	204⋅3	45⋅8, 362⋅8	0⋅013	70⋅4	4⋅7, 136⋅0	0⋅036
Height, cm	0⋅54	–19⋅10, 20⋅17	0⋅956
Weight, kg
17 weeks	3⋅58	−17⋅86, 25⋅01	0⋅739
26 weeks	8⋅269	−12⋅46, 29⋅00	0⋅427
34 weeks	11⋅23	−8⋅05, 30⋅52	0⋅248
Post-delivery	15⋅37	−3⋅14, 33⋅88	0⋅101
Weight gain, 17–34 weeks	35⋅58	−9⋅07, 80⋅22	0⋅116
Total body water, kg by D2O
17 weeks	15⋅04	−20⋅54, 50⋅62	0⋅400
34 weeks	−2⋅70	−35⋅11, 29⋅71	0⋅868
Water gain, 17–34 weeks, kg	−26⋅39	−68⋅70, 15⋅93	0⋅216
Maternal dry weight, kg
17 weeks	−3⋅69	−34⋅21, 26⋅8	0⋅809
34 weeks	22⋅31	−3⋅33, 47⋅96	0⋅087
Dry weight gain, 17–34 weeks	41⋅83	9⋅87, 73⋅79	0⋅011	37⋅6	7⋅4, 67⋅7	0⋅016
% Water/total weight
Water/total weight %, 17 weeks	10⋅79	−12⋅36, 33⋅94	0⋅354
Water/total weight %, 34 weeks	−6⋅21	−36⋅77, 4⋅33	0⋅119
Water/weight gain %, 17–34 weeks	−1⋅93	−3⋅59, −0⋅216	0⋅028

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