Table 2.
Distribution of the PCBs serum concentration of the study population (n = 181).
| Parameters | Mean ± SD | Range | Median | IQR |
|---|---|---|---|---|
| ΣNdl-PCBs, ng/g lipid | 4.708 ± 2.890 | 0.35–15.34 | 4.07 | 2.47–5.97 |
| PCB 28, ng/g lipid | 0.063 ± 0.155 | 0.01–1.18 | 0.01b | 0.01–0.01 |
| PCB 52, ng/g lipid | 0.038 ± 0.071 | 0.01–0.48 | 0.01b | 0.01–0.01 |
| PCB 99, ng/g lipid | 0.051 ± 0.053 | 0.01–0.29 | 0.02a | 0.01–0.09 |
| PCB 101, ng/g lipid | 0.025 ± 0.040 | 0.01–0.32 | 0.01b | 0.01–0.01 |
| PCB 138, ng/g lipid | 1.937 ± 1.680 | 0.09–7.50 | 1.68 | 1.04–2.62 |
| PCB 153, ng/g lipid | 2.486 ± 1.438 | 0.15–8.14 | 2.20 | 1.43–3.22 |
| PCB 180, ng/g lipid | 0.117 ± 0.144 | 0.01–0.92 | 0.08 | 0.01–0.15 |
| Σdl-PCBs, ng/g lipid | 0.116 ± 0.150 | 0.02–1.04 | 0.07 | 0.02–0.13 |
| PCB 114, ng/g lipid | 0.063 ± 0.104 | 0.01–0.66 | 0.02a | 0.01–0.08 |
| PCB 118, ng/g lipid | 0.042 ± 0.042 | 0.01–0.22 | 0.02a | 0.01–0.07 |
| Σdl-PCBs, pg/g lipid | 116.685 ± 150.399 | 20.00–1040.00 | 70.00 | 20.00–150.00 |
| ΣPCBs, ng/g lipid | 4.810 ± 2.978 | 0.37–15.68 | 4.08 | 2.51–6.15 |
CI confidence interval, OR odds ratio, ΣPCBs total polychlorinated biphenyls, ΣNdl-PCBs non-dioxin-like-PCBs, Σdl-PCBs dioxin-like-PCBs, IQR interquartile range.
aThe numbers reported are the closest to the 50th percentile, and they were considered as an estimation of the median.
bMore than 70% of the samples were less than the detection limit, so the median value set half of the LOD.