Table 2 Estimated effect of cleaning protocol on colony counts: manual cleaning vs portable pulsed ultraviolet machine cleaning (N = 20 rooms)
Type of colonies | Regression coefficient (beta) | 95% CI for beta | Incident rate ratio (exp(beta)) | 95% CI for IRR | Chi-square statistic | Pr |
|---|---|---|---|---|---|---|
MRSA | ||||||
Baseline count | 0.004 | <0.0-0.001 | -- | 3.24 | 0.07 | |
Manual cleaning | 2.0 | 0.2-3.7 | 7.2 | 1.3-41.4 | 4.91 | 0.03 |
HPC | -- | |||||
Baseline count | 0.002 | <0.0-0.01 | 1.49 | 0.22 | ||
Manual cleaning | 2.6 | 1.3-3.8 | 12.9 | 3.5-47.8 | 14.7 | <.01 |