Table 2.
Multivariable model Least Squares Means reduction in log10 CFUs at 48 hours of incubation (controlling for keyboard location).
| Disinfectant | Least squares means baseline count in log10 CFUs | 95% CI | Least squares means reduction in log10 CFUs | 95% CI | Percent reduction* |
|---|---|---|---|---|---|
| AHP | 1.09 | 0.95, 1.23 | 0.97 | 0.73, 1.20 | 91.5% |
| Alcohol | 1.18 | 1.04, 1.32 | 0.99 | 0.76, 1.20 | 65.3% |
| QAC | 1.10 | 0.96, 1.24 | 0.86 | 0.63, 1.10 | 94.9% |
| NT | 1.06 | 0.78, 1.34 | 0.75 | 0.28, 1.23 | 78.8% |
AHP — accelerated hydrogen peroxygen; CFU — colony-forming unit; CI — confidence interval; NT — no treatment; QAC — quaternary ammonium compound;
*
percent difference between least squares means for “dirty” and “clean” samples where positive values represent reduced growth.