Table 2.
Mean log reduction factor of Escherichia coli after volunteers cleaned their hands with either the Supertowel (treatment) or control procedures
| Product | Mean log10 reduction factor Supertowel (SD) | Mean log10 reduction factor Control (SD) | Difference | P-value |
|---|---|---|---|---|
| Phase 1 tests: | ||||
| Treatment 1 (reduced hand cleaning duration) | 2.71 (0.35) | 2.96 (0.54) | 0.25 | 0.04 |
| Treatment 2 (reduced wetness of the Supertowel) | 3.27 (0.51) | 3.39 (0.55) | 0.12 | 0.58 |
| Treatment 3 (hand cleaning with contaminated water) | 3.13 (0.47) | 3.29 (0.40) | 0.16 | 0.12 |
| Treatment 4 (dirty Supertowel) | 3.52 (0.37) | 3.33 (0.56) | 0.19 | 0.34 |
| Phase 2 test: | ||||
| Treatment 5 (dirty Supertowel, contaminated water and use for 30 seconds) | 3.50 (0.44) | 3.33 (0.34) | 0.18 | 0.4 |
| Treatment 6 (dry Supertowel) | 3.62 (0.46) | 3.33 (0.34) | 0.31 | 0.02 |
P-values were derived using Wilcoxon’s matched pair signed-rank tests.