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Table 6 Effect of interaction between blood lead and blood cadmium levels on odds of T. gondii seropositivity, NHANES 1999–2004, 2009–10

From: Elevated blood lead and cadmium levels associated with chronic infections among non-smokers in a cross-sectional analysis of NHANES data

Blood lead levels Blood cadmium levels
<Median ≥Median AOR (95 % CI) within Pb strata
N (Weighted %) AOR (95 % CI) N (Weighted %) AOR (95 % CI)
<Median 4629 (5.2) 1.0 3892 (9.3) 1.24 (0.978–1.59) 1.26 (0.94–1.69
P = 0.0805 P = 0.1222
≥Median 4101 (10.4) 1.45 (1.17–1.79) 5803 (17.0) 1.64 (1.30–2.07) 1.34 (0.97–1.85)
P = 0.0007 P = <0.0001 P = 0.0779
AOR (95 % CI) within Cd strata   1.13 (0.78–1.62)   1.41 (1.22–1.63)  
P = 0.5244 P = <0.0001
  1. Measure of interaction on additive scale: RERI (95 % CI) = -0.05 (−0.42–0.32)
  2. Measure of interaction on multiplicative scale: ratio of ORs (95 % CI) = 0.91 (0.69–1.21) P = 0.5262
  3. AORs are adjusted for NHANES cycle, age, gender, race/ethnicity, country of birth origin, family income, self-reported general health condition, and household crowding