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Table 4 Effect of interaction between blood lead and blood cadmium levels on odds of H. pylori seropositivity, NHANES 1999–2000

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 1662 (11.6) 1.0 1074 (23.7) 1.38 (1.03–1.97) 1.20 (0.88–1.64)
P = 0.0337 P = 0.2597
≥Median 1436 (22.1) 1.43 (1.10–1.87) 4073 (35.2) 1.63 (1.27–2.10) 1.27 (1.02–1.57)
P = 0.0082 P = 0.0002 P = 0.0313
AOR (95 % CI) within Cd strata   1.32 (0.97–1.79)   1.27 (0.98–1.65)  
P = 0.0795 P = 0.0689
  1. Measure of interaction on additive scale: RERI (95 % CI) = -0.21 (−0.74–0.32)
  2. Measure of interaction on multiplicative scale: ratio of ORs (95 % CI) = 0.82 (0.56–1.21); P = 0.3183
  3. AORs are adjusted for age, gender, race/ethnicity, country of birth origin, family income, self-reported general health condition, tap water source, and household crowding