Table 3

Impact of maternal behavior during pregnancy on the risk of injury related infant death

HomicideUnintentional injury
Risk factorNo of birthsNo of deathsUnadjusted OR (95% CI)Adjusted OR (95% CI)*No of deathsUnadjusted OR (95% CI)Adjusted OR (95% CI)*
CI = confidence interval; OR = odds ratio.
*Adjusted odds ratios obtained from logistic regression models for homicide/unintentional injury including race, birth weight, alcohol intake, cigarette smoking, prenatal care, marital status, maternal age, maternal education, paternal education, birth order, and interpregnancy interval.
Total10 671 6668212397
Alcohol intake (drinks/week)
    Non-drinker7 822 3225961.01.018181.01.0
    1–2156 894141.2 (0.7 to 2.0)1.0 (0.6 to 1.7)461.3 (0.9 to 1.7)1.0 (0.8 to 1.4)
    3–420 96031.9 (0.6 to 5.8)0.9 (0.3 to 2.9)61.2 (0.6 to 2.7)0.6 (0.3 to 1.4)
    ≥522 75452.9 (1.2 to 7.0)1.1 (0.5 to 2.7)173.2 (2.0 to 5.2)1.3 (0.8 to 2.1)
    Missing2 648 7362031.0 (0.9 to 1.2)0.9 (0.6 to 1.2)5100.8 (0.8 to 0.9)0.9 (0.7 to 1.1)
Cigarette smoking (packs/day)
    Non-smoker6 390 2614161.01.012581.01.0
    ½831 2361222.3 (1.8 to 2.8)1.6 (1.3 to 1.9)3131.9 (1.7 to 2.2)1.3 (1.1 to 1.5)
    ½12–1494 901461.4 (1.1 to 1.9)1.2 (0.8 to 1.6)2302.4 (2.1 to 2.7)1.6 (1.4 to 1.9)
    >187 463152.6 (1.6 to 4.4)2.1 (1.3 to 3.6)382.2 (1.6 to 3.0)1.4 (1.0 to 1.9)
    Missing2 867 8052221.2 (1.0 to 1.4)1.3 (0.9 to 1.8)5581.0 (0.9 to 1.0)1.0 (0.9 to 1.3)
Prenatal care
    Adequate7 079 4723281.01.010951.01.0
    Intermediate2 334 8342432.2 (1.9 to 2.7)1.3 (1.1 to 1.5)7352.0 (1.9 to 2.2)1.3 (1.2 to 1.5)
    Inadequate850 7061764.5 (3.7 to 5.4)1.8 (1.4 to 2.2)4333.3 (2.9 to 3.7)1.5 (1.3 to 1.7)
    Missing406 654743.9 (3.1 to 5.1)1.8 (1.4 to 2.4)1342.1 (1.8 to 2.6)1.4 (1.2 to 1.7)