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Table 2 Organochlorine concentrations in mother's serum lipids in late pregnancy and infant exposure from mother's milka

From: Immune cell counts and risks of respiratory infections among infants exposed pre- and postnatally to organochlorine compounds: a prospective study

Exposure

Study groups

  

Serumb

Infections

White blood cells

Lymphocyte subsets

CB 28+52+101

4 (3–427)

4 (3–427)

4 (3–19)

CB-153

60 (23–179)

57 (23–158)

59 (23–158)

Di-ortho PCB

131 (44–362)

127 (44–342)

129 (44–342)

Mono-ortho PCB TEQ

4 (1–20)

4 (1–11)

4 (1–9)

p,p'-DDE

88 (21–622)

85 (24–622)

83 (29–622)

Mother's milk exposurec

   

CB 28+52+101

8 (0–155)

8 (0–76)

9 (0–39)

CB-153

187 (0–853)

174 (0–396)

186 (0–396)

Di-ortho PCB

364 (0–1666)

351 (0–830)

372 (0–830)

Mono-ortho PCB TEQ

11 (0–54)

11 (0–26)

11 (0–26)

p,p'-DDE

311 (0–2199)

289 (0–2199)

306 (0–2199)

  1. aMedian (range). Di-ortho PCB = CB-138, CB-153, CB-180; Mono-ortho PCB TEQ = CB-105, CB-118, CB-156, CB-167 [32]. The study group "Infections" consists of all study participants (prenatal exposure N = 190; postnatal exposure N = 175), the "White blood cells" group is a subgroup of infants among the study participants which had their WBC counts analyzed (N = 86), and within this subgroup lymphocyte subsets were analyzed in the "Lymphocyte" group composed of infants with enough blood left after WBC count analysis (N = 52).
  2. bng/g lipid. Mono-ortho PCBs: pg TEQ/g lipid [32]. Serum sampled week 32–34.
  3. cng/g fresh weight*days. Mono-ortho PCBs: pg TEQ/g fresh weight*days. Calculated as organochlorine concentration in mother's milk on a fresh weight basis*days of nursing*(%of full nursing/100).