TABLE 2

Prevalence of Heavy Caffeine Consumption (≥300 mg/day) During Pregnancy and at 3 Mo Postpartum According to Maternal and Infant Characteristics

VariablesFirst TrimesterSecond TrimesterThird Trimester3 Mo PostpartumWhole Pregnancy + Postpartum
%P%P%P%P%P
Maternal characteristics
 Family income (quintiles)<.001<.001<.001<.001<.001
   1 (poorest)24.022.220.117.38.3
   224.823.221.317.29.0
   321.921.019.916.88.2
   416.214.213.212.14.2
   5 (wealthiest)9.69.09.18.52.6
 Living with partner.267.429.252.007.214
   Yes19.017.716.215.06.7
   No20.919.018.110.95.3
 Schooling, y<.001<.001<.001<.001<.001
   Up to 432.931.128.926.512.9
   5–823.521.820.416.58.4
   9–1111.310.59.28.42.5
   ≥128.88.07.28.02.6
 Maternal age, y.174.244.380<.001.111
   <2016.915.815.38.64.8
   20–3519.718.517.015.26.8
   >3520.717.915.219.27.1
 Maternal skin color.009.018.012.315.778
   White18.216.915.513.96.3
   Black21.820.518.815.97.0
   Other24.121.520.815.36.2
  Parity<.001<.001<.001<.001<.001
   013.012.111.47.92.9
   1–321.520.018.416.17.4
   ≥433.530.727.831.815.9
 Paid work during pregnancy<.001<.001<.001.010.009
   No21.620.018.415.57.3
   Yes15.814.913.712.65.2
 Smoking during pregnancy<.001<.001<.001<.001<.001
   No12.711.510.39.33.2
   Yes37.135.233.328.115.3
 Daily cigarettes during pregnancy<.001<.001.001<.001<.001
   1–1032.230.729.723.512.1
   >1048.344.541.039.222.4
 Alcohol consumption<.001<.001<.001<.001<.001
   No18.817.516.014.06.2
   Yes35.231.330.525.614.8
 Maternal depression 3 mo postpartum.102.114.095.006.229
   No21.319.717.711.96.6
   Yes28.426.524.521.69.8
Infant characteristics
 Gender.913.628.940.190.554
   Boy19.417.616.513.76.2
   Girl19.218.216.515.16.7
 Maternal bed-sharing<.001<.001<.001<.001.001
   No15.714.813.612.55.2
   Yes23.521.519.816.57.9
 No, of h slept at daytime (tertiles).946.993.938.537.311
   122.320.317.914.27.1
   222.520.618.511.45.5
   321.420.619.113.78.8