Table 7

Odds ratios for living within 3 km from a site by low, medium, and high hazard category—malformation subgroups

OverallWaterAir
Hazard categorynOR*95% CInOR*95% CInOR*95% CI
*Odds ratios stratified for study area and year of birth, not adjusted for socioeconomic status or maternal age.
†Negative trend.
Neural tube defects
Low742.141.25 to 3.69191.880.66 to 5.35120.460.10 to 2.09
Medium241.050.38 to 2.85781.741.01 to 3.001031.931.23 to 3.02
High281.890.84 to 4.29291.940.87 to 4.32113.811.01 to 14.43
Trend in 3 ORs with hazard categoryp=0.64†p=0.95p=0.06
Trend in 14 ORs with hazard scorep=0.74†p=0.81p=0.20
Cardiac septal defects
Low1192.081.32 to 3.27610.990.50 to 1.99741.710.92 to 3.16
Medium740.840.45 to 1.551341.571.02 to 2.421371.420.93 to 2.15
High491.650.86 to 3.16472.021.07 to 3.83311.600.66 to 3.84
Trend in 3 ORs with hazard categoryp=0.31†p=0.16p=0.68†
Trend in 14 ORs with hazard scorep=0.67†p=0.32p=0.31†
Malformations of the great arteries and veins
Low271.690.69 to 4.14141.360.38 to 4.82121.170.27 to 5.12
Medium101.510.33 to 6.96251.630.63 to 4.18422.151.11 to 4.15
High242.190.93 to 5.17222.591.06 to 6.3271.200.18 to 8.08
Trend in 3 ORs with hazard categoryp=0.70p=0.47p=0.99
Trend in 14 ORs with hazard scorep=0.84p=0.66p=0.59