TABLE 4—

Estimated Lead Ratios by Child Characteristics, Black and White Children With Lead Levels of 9 μg/dL or Below: United States, 2011–2012 (n = 1460)

Variable	Lead Ratio (95% Confidence Interval)
Black race	1.06 (0.97, 1.15)
Age: 6-mo increase	1.07 (1.05, 1.09)
Female gender	0.92 (0.86, 0.98)
Summer month of collection	1.20 (1.11, 1.31)
Medicaid recipient	1.04 (0.96, 1.13)
State smoking rate: 1% increase	1.00 (0.98, 1.02)
State average winter temperature: 1° increase	1.00 (1.00, 1.01)
Cotinine level ≥ 0.3 ng/g	1.21 (1.13, 1.30)

Note. 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).