Table 2

Weight for age z scores at birth: associations with potential predictors in regression models
Weight for age z score at birth Weight for age z score < −2 SD
N = 17318 Univariable Multivariable Univariable Multivariable
Coefficient (95% CI) Coefficient (95% CI) OR (95% CI) aOR (95% CI)
Household
Allocation to trial intervention (reference: control) −0.055 (−0.126, 0.017) 0.019 (−0.034, 0.071) 1.051 (0.960, 1.150) 0.963 (0.869, 1.066)
Asset score (continuous) 0.070 (0.050, 0.091) 0.074 (0.054, 0.094) 0.900 (0.865, 0.937) 0.867 (0.850, 0.927)
Nuclear family (reference: extended family) 0.000 (−0.008, 0.008) 0.000 (−0.008, 0.008) 0.992 (0.972, 1.012) 0.993 (0.973, 1.015)
Religion (reference: Hindu)
Muslim 0.154 (0.107, 0.200) 0.144 (0.101, 0.187) 0.887 (0.816, 0.963) 0.867 (0.793, 0.949)
Buddhist −0.223 (−0.317, 0.129) −0.214 (−0.302, -0.125) 1.383 (1.176, 1.627) 1.375 (1.157, 1.634)
Other 0.105 (−0.033, 0.244) 0.081 (−0.051, 0.214) 0.933 (0.710, 1.225) 0.952 (0.715, 1.267)
Mother
Age (continuous, in years) 0.020 (0.015, 0.024) 0.009 (0.004, 0.015) 0.981 (0.972, 0.990) 0.989 (0.978, 1.000)
Schooling (reference: none)
Primary −0.058 (−0.148, 0.032) −0.033 (−0.012, 0.053) 1.145 (0.968, 1.364) 1.124 (0.940, 1.345)
Secondary −0.030 (−0.077, 0.018) 0.006 (−0.041, 0.054) 1.038 (0.947, 1.139) 1.019 (0.921, 1.129)
Higher 0.140 (0.068, 0.211) 0.189 (0.116, 0.262) 0.839 (0.725, 0.970) 0.812 (0.691, 0.954)
Pregnancy
3 or more antenatal care visits (reference: <3 visits) 0.209 (0.117, 0.301) 0.179 (0.054, 0.094) 0.687 (0.583, 0.809) 0.716 (0.602, 0.851)
Took more rest in third trimester than before pregnancy −0.017 (−0.061, 0.026) 0.042 (0.001, 0.084) 0.957 (0.880, 1.042) 0.884 (0.808, 0.967)
Did less work in third trimester than before pregnancy −0.054 (−0.096, -0.012) 0.016 (−0.024, 0.056) 1.038 (0.958, 1.125) 0.948 (0.870, 1.034)
Ate more food in second and third trimesters than before pregnancy 0.108 (0.056, 0.159) 0.130 (0.081, 0.179) 0.876 (0.790, 0.970) 0.833 (0.747, 0.928)
Packets of iron tablets taken (1, 2, 3; reference: none) 0.061 (0.042, 0.081) 0.043 (0.023, 0.063) 0.895 (0.863, 0.929) 0.921 (0.883, 0.959)
Newborn infant
Birth order (reference: first baby) 0.115 (0.093, 0.137) 0.108 (0.082, 0.134) 0.900 (0.862, 0.941) 0.896 (0.848, 0.947)
Female infant (reference: male) −0.011 (−0.049, 0.026) −0.003 (−0.039, 0.033) 1.127 (1.047, 1.213) 1.123 (1.041, 1.212)
Twin (reference: singleton) −1.724 (−1.865, -1.584) −1.528 (−1.665, -1.391) 10.174 (7.911, 13.085) 9.182 (7.065, 11.933)
Preterm (reference: term) −1.182 (−1.254, -1.110) −1.077 (−1.148, -1.006) 4.513 (3.999, 5.093) 4.119 (3.637, 4.665)

Multivariable models include covariates for asset score, religion, maternal age and schooling, three or more antenatal care visits, birth order, twin status and preterm. CI: confidence interval. OR: odds ratio. aOR: adjusted odds ratio. SD: standard deviation.

Das et al.

Das et al. Nutrition Journal 2012 11:100   doi:10.1186/1475-2891-11-100

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