Table 3.

Percent With Child Behavior Problems and RR, as Estimated by the OR, by Maternal Smoking Before, During, and After Pregnancy

Cigarettes per dayNInternalizingSATExternalizing
Prepregnancy%RR%RR%RR
 None260810.7111.018.31
 1–95769.20.8411.11.019.71.19
 10–1980812.51.1915.61.49* 11.61.46*
 ≥2088714.41.40* 14.71.38* 16.12.11*
FCV
 None315210.8110.818.11
 1–979310.60.9813.11.2511.51.46*
 10–1957714.61.41* 16.51.64* 16.12.16*
 ≥2035715.11.47* 19.62.02* 18.82.60*
Late pregnancy
 None310510.6110.918.61
 1–966210.71.0212.11.139.51.12
 10–1958713.01.2615.81.55* 13.31.64*
 ≥2052516.61.68* 18.71.89* 19.22.54*
6 Months
 None278610.6110.718.31
 1–95509.00.8910.11.029.01.20
 10–1961412.01.1915.91.59* 12.31.51*
 ≥2075115.61.49* 16.81.65* 16.62.15*
5 Years
 None305610.6110.718.11
 1–94088.10.7411.81.1112.21.59*
 10–1960312.61.2216.11.60* 13.81.82*
 ≥2081215.91.59* 16.81.68* 15.82.13*
  • * 95% CI excludes unity.