Table 2

 Lifespan and acute exposures to high concentration of CO (>2 ppm) and NO2 (>0.05 ppm) and risk of SIDS, unadjusted and adjusted matched analyses

UnadjustedAdjusted*
OR (95% CI)pOR (95% CI)p
*Adjusted for postnatal smoking by all live-in household members, low infant birth weight, infant medical conditions at birth, and maternal education.
Carbon monoxide
Lifespan/exposure period1.63 (0.67 to 3.92)0.281.41 (0.54 to 3.69)0.49
Last 30 days1.33 (0.46 to 3.84)0.591.30 (0.38 to 4.50)0.68
Last 7 days0.93 (0.44 to 1.98)0.851.00 (0.43 to 2.33)1.00
Last 3 days1.00 (0.48 to2.10)1.000.94 (0.40 to 2.23)0.90
Last day1.00 (0.51 to 1.96)1.001.30 (0.61 to 2.79)0.50
Nitrogen dioxide
Lifespan/exposure period1.75 (0.73 to 4.17)0.211.30 (0.49 to 3.42)0.60
Last 30 days1.56 (0.67 to 3.59)0.301.40 (0.55 to 3.59)0.48
Last 7 days1.70 (0.78 to 3.71)0.181.69 (0.70 to 4.07)0.24
Last 3 days1.55 (0.72 to 3.30)0.262.20 (0.94 to 5.16)0.07
Last day2.07 (1.09 to 3.92)0.032.34 (1.13 to 4.87)0.02