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Table 5 Descriptive statistics for MIREC PCBs concentrations in maternal and cord blood plasma (lipid-adjusted—μg/kg)

From: Concentrations of persistent organic pollutants in maternal and cord blood from the maternal-infant research on environmental chemicals (MIREC) cohort study

Contaminanta Aliquot N LOD % < LOD Min Median 95th Percentile Max KM Median 95 % CI GM 95 % CI
Mono-ortho Dioxin-Like PCBs
 PCB105 Maternal 1935 0.01 95.71 ND ND ND 13.62 NA NA NA NA NA NA
Cord 1382 0.01 99.86 ND ND ND 100 NA NA NA NA NA NA
 PCB118 Maternal 1935 0.01 26.61 ND 2.33 6.78 37.93 2.30 2.22 2.37 2.36 2.29 2.43
Cord 1382 0.01 98.34 ND ND ND 100 NA NA NA NA NA NA
 PCB156 Maternal 1935 0.01 79.07 ND ND 3.52 17.46 NA NA NA NA NA NA
Cord 1380 0.01 99.71 ND ND ND 100.00 NA NA NA NA NA NA
 PCB167 Maternal 1935 0.01 98.40 ND ND ND 4.49 NA NA NA NA NA NA
Non-dioxin-like PCBs
 PCB28 Maternal 1934 0.05 99.74 ND ND ND 260 NA NA NA NA NA NA
 PCB66 Maternal 1934 0.03 99.28 ND ND ND 28 NA NA NA NA NA NA
 PCB74 Maternal 1935 0.03 96.54 ND ND ND 18.4 NA NA NA NA NA NA
 PCB99 Maternal 1934 0.03 97.16 ND ND ND 12.93 NA NA NA NA NA NA
 PCB101 Maternal 1934 0.03 99.90 ND ND ND 12.07 NA NA NA NA NA NA
 PCB128 Maternal 1935 0.01 99.79 ND ND ND 5 NA NA NA NA NA NA
 PCB138 Maternal 1935 0.01 7.03 ND 4.07 14.77 71.67 4.07 3.91 4.23 4.21 4.08 4.35
Cord 1382 0.01 95.08 ND ND ND 100 NA NA NA NA NA NA
 PCB146 Maternal 1935 0.01 85.43 ND ND 2.93 16 NA NA NA NA NA NA
Cord 1382 0.01 99.86 ND ND ND 100 NA NA NA NA NA NA
 PCB153 Maternal 1935 0.01 1.29 ND 7 25.95 155 7 6.73 7.27 7.30 7.07 7.54
Cord 1382 0.01 84.01 ND ND 45.26 101.45 NA NA NA NA NA NA
 PCB170 Maternal 1935 0.01 46.82 ND 2 7.22 71.67 1.69 1.62 1.76 1.67 1.59 1.75
Cord 1382 0.01 98.34 ND ND ND 100 NA NA NA NA NA NA
 PCB163 Maternal 1935 0.01 68.11 ND ND 4.70 23.81 NA NA NA NA NA NA
Cord 1382 0.01 99.20 ND ND ND 100 NA NA NA NA NA NA
 PCB178 Maternal 1935 0.01 95.71 ND ND ND 9.02 NA NA NA NA NA NA
 PCB180 Maternal 1935 0.01 7.39 ND 4.72 19.70 183.33 4.72 4.53 4.91 4.88 4.70 5.06
Cord 1382 0.01 93.63 ND ND 41.67 100 NA NA NA NA NA NA
 PCB183 Maternal 1935 0.01 91.21 ND ND 2.50 23.33 NA NA NA NA NA NA
Cord 1382 0.01 99.93 ND ND ND 100 NA NA NA NA NA NA
 PCB187 Maternal 1935 0.01 57.21 ND ND 5.88 45 NA NA NA NA NA NA
Cord 1382 0.01 99.57 ND ND ND 100 NA NA NA NA NA NA
 PCB194 Maternal 1928 0.01 81.17 ND ND 3.39 30 NA NA NA NA NA NA
Cord 1382 0.01 99.93 ND ND ND 100 NA NA NA NA NA NA
 PCB201 Maternal 1935 0.01 83.72 ND ND 2.97 20 NA NA NA NA NA NA
 PCB203 Maternal 1935 0.01 89.35 ND ND 2.56 14.17 NA NA NA NA NA NA
 PCB206 Maternal 1928 0.01 97.67 ND ND ND 6.61 NA NA NA NA NA NA
  1. ND Due to a high percentage of non-detects, descriptive statistics were not reported
  2. NA Non-applicable (KM median and GM MLE of contaminants with less than 50 % of observations detected were not calculated)
  3. a Contaminants PCB 52 was not detected in both maternal and cord blood samples. Contaminants PCB 101, PCB 128, PCB 167, PCB 178, PCB 201, PCB 203, PCB 206, PCB 28, PCB 66, PCB 74, PCB 99, were not detected in the cord blood