Table 1.

Comparison of maternal and child characteristics between mothers who gave an estimate of birthweight and those who did not

Characteristic	Total mothers interviewed N = 404	Number (%) mothers who estimated birthweight	Crude OR (95% CI)	P-value	Adjusted OR (95% CI)*	P-value*
Mother’s age at birth of child (years)
15–19	72	59 (82%)	1	0.004 [trend]	1	0.95
20–24	153	121 (79%)	0.83 (0.41–1.70)		1.46 (0.63–3.39)
25–29	100	73 (73%)	0.60 (0.28–1.26)		1.50 (0.54–4.13)
30+	79	50 (63%)	0.38 (0.18–0.81)		1.19 (0.37–3.79)
Mother’s education†
None	13	3 (23%)	0.12 (0.03–0.48)	<0.001	0.11 (0.03–0.44)	0.002
Primary	183	132 (72%)	1		1
Secondary	169	138 (82%)	1.72 (1.04–2.85)		1.36 (0.80–2.31)
Tertiary	38	29 (76%)	1.24 (0.55–2.81)		0.97 (0.41–2.30)
Birth order
1	87	76 (87%)	1	<0.001 [trend]	1	0.02 [trend]
2	103	80 (78%)	0.50 (0.23–1.10)		0.51 (0.21–1.22)
3–4	131	98 (75%)	0.43 (0.20–0.91)		0.40 (0.15–1.05)
≥5	83	49 (59%)	0.21 (0.10–0.45)		0.23 (0.07–0.74)
Sex of child
Male	204	149 (73%)	1	0.36
Female	200	154 (77%)	1.24 (0.79–1.94)
Age of child (years)
4	84	62 (74%)	1	0.68
5	175	133 (76%)	1.12 (0.62–2.04)
6	119	91 (76%)	1.15 (0.61–2.20)
7	26	17 (65%)	0.67 (0.26–1.72)
Recorded birthweight (kg)‡
<2.5	17	13 (76%)	1	0.94
2.5–4	302	241 (80%)	1.22 (0.38–3.86)
>4	14	11 (79%)	1.13 (0.21–6.17)

^*Multivariable model included mother’s age at birth of child, mother’s education and birth order, the adjusted estimate for mother’s age is interpreted as the independent effect of age that does not act through birth order, controlling for mother’s education.

^†One missing value.

^‡Restricted to the 333 children for whom a record of birthweight was available.