APPENDIX 2

Covariates Associated With Infant Weight Gain From 8 Weeks to 9 Months and From Birth to 9 Months

N8 wk to 9 mo Weight-Gain z ScoreBirth to 9 mo Weight-Gain z Score
MeanSDPMeanSDP
Maternal height at birth, cm
    ≥1753710.441.00<.00010.421.06<.0001
    171 to <1759630.301.000.321.08
    165 to <170a14400.141.040.181.13
    161 to <165a15620.071.020.101.07
    156 to <160652−0.021.020.041.03
    151 to <156465−0.191.04−0.091.13
    <151 cm81−0.280.90−0.120.97
Maternal BMI at birth, kg/m2
    <19354NS−0.050.98.02
    19 to <21a12860.101.02
    21 to <23a15620.151.01
    23 to <25a9890.121.02
    ≥25a10650.131.08
Infant parity (ordinal position)
    First borna25840.311.08<.00010.231.01<.0001
    Second born20190.031.090.031.03
    Third born7180.021.15−0.021.09
    Fourth born267−0.051.13−0.051.09
Health of infant at 6 mo of age
    No problemsa56330.161.10.060.111.04.61
    Problems138−0.021.210.071.15
Duration of breastfeeding: >6 mo
    Noa50010.191.10<.00010.131.04.0004
    Yes770−0.031.09−0.011.02
Refusing milk other than breast milk at 6 mo
    Noa46240.231.11<.00010.161.04<.0001
    Yes1147−0.161.02−0.101.01
Taking too small quantity of feed at 6 mo
    Noa39080.231.11<.00010.201.04<.0001
    Yes18630.011.07−0.061.01
  • NS indicates not significant; —, not applicable.

  • a Reference group used in the multivariate analysis.