Study Subject | Total no. of samples | Before work no. of samples measured lead | % Before Work | Total no. of samples | After AH no. of samples measured lead | % AH | Handwashing % lead removal efficiency (mean value) (AWH-AW) | Mean Lead concentration µg/wipe AW |
1 | 9 | 7 | 78 | 9 | 5 | 56 | 94.5 | 450.7 |
2 | 10 | 5 | 50 | 10 | 5 | 50 | 92.8 | 241.5 |
3 | 9 | 5 | 56 | 9 | 5 | 56 | 91.8 | 399.1 |
4 | 10 | 6 | 60 | 10 | 4 | 40 | 86.6 | 243.7 |
5 | 7 | 3 | 43 | 7 | 5 | 71 | 95.0 | 358.1 |
6 | 6 | 2 | 33 | 6 | 5 | 83 | 88.2 | 232.9 |
7 | 4 | 4 | 100 | 4 | 4 | 100 | 93.2 | 644.1 |
8 | 4 | 4 | 100 | 4 | 4 | 100 | 93.1 | 753.8 |
Total | 59 | 36 | - | 59 | 37 | - | - | - |