TABLE 2

Characteristics of Exposed and Unexposed Children by Age Groups

CharacteristicAge Group
3–11 mo (2445 [34.6%] of 7072)1–2 y (2678 [34.5%] of 7771)3–5 y (3872 [36.0%] of 10 767)6–12 y (8440 [35.8%] of 23 544)13–17 y (6956 [33.9%] of 20 511)
EstimateaPbEstimateaPbEstimateaPbEstimateaPbEstimateaPb
Girls, %
    Exposed47.0.0850.2.8848.3.3348.3.1149.0.76
    Unexposed49.250.449.349.449.2
No. of parents, % with 1, 2, or 3
    Exposed
        113.4<.000111.7<.000111.4<.000112.6<.000114.4<.0001
        278.782.281.779.977.9
        38.06.16.87.47.7
    Unexposed
        120.823.123.525.216.7
        277.875.074.171.879.6
        31.42.02.43.03.7
Mean No. of chronic diseases
    Exposed0.32<.00010.15<.00010.16<.00010.31<.00010.54<.0001
    Unexposed0.190.100.100.160.32
Mean No. of membership months
    Exposed9.59<.00019.91<.000110.05<.000110.25<.000110.45<.0001
    Unexposed8.348.398.548.919.82
  • a Estimates are percentages for % girls and number of parents and means for number of chronic disease and membership months.

  • b P value from χ2 test for % girls and number of parents and from Wilcoxon rank sum test for number of chronic disease and membership months.