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Table 2 Description of the concentration of EDCs including geometric mean, 95% confidence interval (95% CI), percent above LOD, percent who were included in this analysis (NHANES 1999–2002)

From: A path analysis of multiple neurotoxic chemicals and cognitive functioning in older US adults (NHANES 1999–2002)

Chemical LODa (LAb/NLAc) Above LOD (%) Missing (%) Geometric Mean (95% CI) Range Geometric Mean (95% CI) Range
Metals μg/dL
 Lead (μg/dL) 0.3/NA 100 0 2.17 (2.07, 2.27) 0.4-16.4 NA NA
 Cadmium (μg/L) 0.3/NA 86 0 0.49 (0.46, 0.52) 0.2-4.7 NA NA
Non-Dioxin Like (ng/g)     Lipid-adjusted Non-lipid-adjusted
 PCB 74 3.95/0.03 92 0.70 17.78 (16.23, 19.49) 2.8-144 0.12 (0.11, 0.13) 0.02-0.89
 PCB 99 2.96/0.03 80 2.10 10.65 (9.88, 11.48) 2.1-132 0.07 (0.07, 0.08) 0.02-0.80
 PCB 138 2.96/0.03 92 0.56 44.28 (41.40, 47.37) 2.1-310 0.29 (0.27, 0.31) 0.04-4.01
 PCB 146 2.26/0.03 74 1.26 7.86 (7.39, 8.35) 1.6-68.6 0.05 (0.05, 0.05) 0.02-0.69
 PCB 153 2.96/0.03 95 0.29 66.99 (63.66, 70.50) 2.1-433 0.44 (0.42, 0.47) 0.02-5.26
 PCB 170 2.96/0.03 91 4.76 20.59 (19.76, 21.46) 2.1-129 0.14 (0.13, 0.14) 0.02-1.74
 PCB 180 6.20/0.03 97 0.70 51.79 (49.13, 54.60) 4.4-397 0.34 (0.32, 0.36) 0.02-3.65
 PCB 187 2.96/0.03 94 0.14 14.93 (14.25, 15.64) 2.1-178 0.10 (0.09, 0.10) 0.02-1.16
Dioxin Like (ng/g)     Lipid-adjusted Non-lipid-adjusted
 PCB 118 2.96/0.03 93 0.42 20.16 (18.43, 22.05) 2.1-361 0.13 (0.12, 0.14) 0.02-1.95
 PCB126d 2.54/21.73 75 11.19 33.55 (29.98, 37.55) 1.8-402 223.05 (199.26, 249.68) 15.41-8,188
 PCB 156 2.26/0.03 82 1.68 10.14 (9.47, 10.87) 1.6-62.1 0.07 (0.06, 0.07) 0.02-1.03
 PCB 169d 4.65/32.01 84 11.19 31.66 (29.66, 33.79) 3.3-172 210.45 (197.19, 224.60) 22.7-3,340.4
  1. a LOD Limit of detection for lipid adjusted congeners
  2. b LA Lipid adjusted
  3. c NLA Non-lipid-adjusted
  4. dMeasured in fg/g