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Table 2 Distribution of blood levels for lead and cadmium (in μg/mL) among non-smoking NHANES participants, 1999–2012

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

Survey years Pathogen N Blood lead Blood cadmium
Weighted Geometric Mean (95 % CI) 25th P 50th P 75th P % below LODa Weighted Geometric Mean (95 % CI) 25th P 50th P 75th P % below LODb
1999–2000 Helicobacter pylori 5994 1.50 (1.43–1.57) 0.94 1.43 2.18 0.80 0.33 (0.31–0.36) 0.20 0.29 0.40 35.1
 Negative 4073 1.41 (1.34–1.47) 0.88 1.34 2.01 0.96 0.31 (0.29–0.34) 0.20 0.26 0.38 39.6
 Positive 1921 1.86 (1.77–1.95) 1.18 1.76 2.71 0.26 0.40 (0.37–0.43) 0.23 0.36 0.49 20.4
1999–2004, 2009–2010 Toxoplasma gondii 18,425 1.13 (1.10–1.16) 0.72 1.10 1.69 0.95 0.25 (0.24–0.25) 0.15 0.20 0.38 44.7
 Negative 16,449 1.09 (1.07–1.12) 0.70 1.09 1.60 1.01 0.24 (0.24–0.25) 0.15 0.19 0.34 46.4
 Positive 1976 1.44 (1.40–1.49) 1.00 1.40 2.10 0.47 0.29 (0.28–0.31) 0.17 0.29 0.40 30.4
1999–2012 Hepatitis B virus 17,389 1.41 (1.38–1.44) 0.90 1.40 2.10 0.51 0.30 (0.30–0.31) 0.20 0.30 0.44 26.4
 Negative 16,231 1.39 (1.36–1.42) 0.90 1.39 2.09 0.53 0.30 (0.29–0.30) 0.19 0.29 0.42 14.7
 Positive 1158 1.80 (1.72–1.88) 1.23 1.77 2.61 0.18 0.41 (0.38–0.43) 0.27 0.40 0.59 27.1
  1. LOD limit of detection
  2. aLOD = 0.30 (1999–2004), 0.25 (2005–2012)
  3. bLOD = 0.30 (1999–2002). 0.20 (2003–2010), 0.16 (2011–2012)