TABLE 3—
Variable | Cotinine Ratio (95% CI) |
Black children (n = 681) | |
Age: 6-mo increase | 1.03 (0.96, 1.10) |
Female gender | 1.13 (0.88, 1.45) |
Summer month of collection | 0.99 (0.77, 1.28) |
Medicaid recipient | 1.27 (0.92, 1.75) |
State smoking rate: 1% increase | 1.04 (0.98, 1.11) |
State average winter temperature: 1°F increase | 1.00 (0.99, 1.01) |
White children (n = 779) | |
Age: 6-mo increase | 1.16 (1.07, 1.27) |
Female gender | 0.92 (0.69, 1.21) |
Summer month of collection | 1.21 (0.76, 1.92) |
Medicaid recipient | 3.32 (2.35, 4.70) |
State smoking rate: 1% increase | 1.52 (1.24, 1.87) |
State average winter temperature: 1° increase | 1.14 (1.02, 1.27) |
Smoking rate × winter temperature interaction | 0.99 (0.99, 100) |
Note. CI = confidence interval. Data were derived from a multivariate analysis with left censored data. Dried blood spots for which any of the corresponding child characteristics were missing were excluded from this analysis (n = 81). The sample size was n = 1460.