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Summary statistics for PCE exposure indices for female dry cleaning workersa |
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| PCE exposure indices |
Wednesday |
Thursday |
Friday |
Overall |
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| n |
M (SD) |
GM (GSD) |
n |
M (SD) |
GM (GSD) |
n |
M (SD) |
GM (GSD) |
n |
M (SD) |
GM (GSD) |
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| PCE TWA (ppm) |
17b |
2.41 (3.42) |
1.45 (2.73) |
18 |
3.85 (5.35) |
1.84 (3.84) |
35 |
3.15 (4.51) |
1.64 (3.26) |
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| PCE in blood (ng/ml) pre-shift |
15c |
70.5 (106.4) |
36.7 (3.34) |
15 |
70.5 (106.4) |
36.7 (3.34) |
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| PCE in exhaled breath (ppm) pre-shift |
15b,d |
0.55 (0.38) |
0.37 (2.87) |
18 |
0.54 (0.41) |
0.39 (2.40) |
18 |
0.45 (0.33) |
0.30 (2.82) |
51 |
0.51 (0.37) |
0.35 (2.65) |
| PCE in exhaled breath (ppm) post-shift |
16b,d |
0.87 (0.56) |
0.71 (2.02) |
18 |
1.14 (0.91) |
0.71 (3.11) |
11e |
1.82 (0.93) |
1.63 (1.63) |
45 |
1.21 (0.87) |
0.87 (2.51) |
| TCA in urine/creatinine (mg/g) pre-shift |
14e |
1.13 (1.94) |
0.29 (7.23) |
14 |
1.13 (1.94) |
0.29 (7.23) |
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| TCA in urine/creatinine (mg/g) post-shift |
15e |
0.86 (1.08) |
0.37 (4.89) |
9e,f |
1.06 (0.93) |
0.86 (1.86) |
24 |
0.94 (1.01) |
0.51 (3.89) |
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Abbreviations: n, number of samples/specimens; M, arithmetic mean; SD, standard deviation; GM, geometric mean; GSD, geometric standard deviation a For the referent laundry workers PCE TWA (nondetectable) and blood (two orders of magnitude lower than the dry cleaners) were reported in Toraason et al. 2003 [36] b One worker not available for sampling on Wednesday c Three blood specimen results did not satisfy laboratory quality control criteria and were excluded prior to analysis. d Exhaled breath samples were lost due to sample handling. e Samples contained creatinine concentrations outside the 0.3 – 3 g/L range and were excluded prior to analysis. f Two individuals worked alternate schedules and were not sampled on this day. | ||||||||||||
McKernan et al. Environmental Health 2008 7:12 doi:10.1186/1476-069X-7-12 |
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