Table 8 Summary statistics for PCE exposure indices in our study and other studies
From: Biological exposure assessment to tetrachloroethylene for workers in the dry cleaning industry
PCE exposure indices | Present study (n = 18) | Gobba (n = 26) [15] | Solet (n = 195) [16] | Lauwerys (n = 26) [17] | Skender (n = 18) [37] | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Â | M (SD) | GM (GSD) | M (SD) | GM (GSD) | M (SD) | GM (GSD) | M (SD) | GM (GSD) | M (SD) | GM (GSD) |
Machine type(s) | DD | DD | DD & T | Unknown | Unknown | |||||
PCE TWA (ppm) | 3.1 (4.5) | 1.6 (3.3) | 6.5 (6.4) | Â | T29.5 (28.6) DD7.1 (6.4) | T 17.1 (3.6) DD6.5 (2.0) | 20.8 | Â | Â | Â |
PCE in blood (ng/ml) pre-shift | 70.5 (106.4) | 36.7 (3.3) | Â | Â | Â | Â | 400 | Â | 0.6 | Â |
PCE in blood (ng/ml) post-shift | Â | Â | 726 (937) | Â | Â | Â | 1200 | Â | 1.5 | Â |
PCE in exhaled breath (ppm) pre-shift | 0.5 (0.4) | 0.4 (2.7) | Â | Â | Â | Â | 1.9 | Â | Â | Â |
PCE in exhaled breath (ppm) mid-shift | Â | Â | Â | Â | T 7.7 (6.1) DD1.5 (1.2) | T 6.6 (2.3) DD2.2 (1.6) | Â | Â | Â | Â |
PCE in exhaled breath (ppm) post-shift | 1.2 (0.9) | 0.9 (2.5) | 7.9 (12.1) | Â | Â | Â | 5.1 | Â | Â | Â |
TCA in urine/creatinine (mg/g) pre-shift | 1.1 (1.9) | 0.3 (7.2) | Â | Â | Â | Â | Â | Â | 3.9 | Â |
TCA in urine/creatinine (mg/g) post-shift | 0.9 (1.0) | 0.5 (3.9) | Â | Â | Â | Â | Â | Â | 3.4 | Â |