Table 3 Unadjusted mean birth weight (BW) and standard deviation (SD) and the absolute differences in mean birth weight (and 95% CI) for the total sample and according to newborn sex, mother’s age and gestational age at first ANC visit, by study arm
| Â | Intervention | Control | Absolute difference in mean birth weight (p value Ï®) | 95% Confidence Interval | |||
|---|---|---|---|---|---|---|---|
n | mean BW(SD) | n | mean BW(SD) | Lower | Upper | ||
All sample | 3445 | 3152.1 (339.8) | 3192 | 3044.1(353.8) | 108.0 (p = 0.000) | 91.3 | 124.6 |
Newborn sex | Â | Â | Â | Â | Â | Â | Â |
Male | 1773 | 3168.1(342.9) | 1647 | 3062.1(352.2) | 106.0 (p = 0.018) | 82.7 | 129.3 |
Female | 1672 | 3135.2(335.7) | 1545 | 3025.0(354.5) | 110.2 (p = 0.014) | 86.3 | 134.0 |
Age of mother | Â | Â | Â | Â | Â | Â | Â |
15–19 | 218 | 3116.8(320.3) | 241 | 3014.4(368.8) | 102.4(p = 0.027) | 38.8 | 166.1 |
20–24 | 1056 | 3128.4(333.5) | 959 | 3045.3(361.6) | 83.1(p = 0.047) | 52.6 | 113.4 |
25–34 | 1827 | 3163.1(335.9) | 1709 | 3052.7(340.9) | 110.4(p = 0.014) | 88.0 | 132.7 |
35–49 | 344 | 3188.0(383.1) | 282 | 3012.0(387.2) | 176.0(p = 0.008) | 116.1 | 237.6 |
Gestational age at first ANC visit | Â | Â | Â | Â | Â | Â | Â |
< 16 weeks | 1249 | 3136.5(353.4) | 1054 | 3018.3(371.7) | 118.2(p = 0.017) | 88.6 | 147.9 |
16 + weeks | 2092 | 3165.0(331.1) | 2115 | 3057.9(341.6) | 107.1(p = 0.033) | 86.8 | 127.5 |