Table 1 Relationship of QS with hospital size (number of beds) and HAI prevalence computed through Spearman correlation and regression model analysis. The correlation index [95% CI] is reported for the correlation analysis and QS Ratio and Risk Ratio [95% CI] for the regression models. Both analyses were performed on the whole dataset and after stratification by hospital size category (< 200, 200–500, ≥ 500 beds)
Model: QS ~ Number of beds | ||
|---|---|---|
Correlation index [95%CI] | QS Ratio [95%CI] | |
Hospital size stratum (beds) | ||
Small (< 200) | − 0.00047 [− 0.26; 0.26] | 0.76 [0.41, 1.39] |
Medium (200–500) | 0.008 [− 0.27; 0.28] | 0.95 [0.67, 1.35] |
Large (≥ 500) | 0.37 [− 0.038; 0.67] | 1.07 [0.88, 1.3] |
All | 0.02 [− 0.15; 0.19] | 1.02 [0.96, 1.07] |
Model: HAI Prevalence ~ QS | ||
Correlation index [95%CI] | Risk Ratio [95%CI] | |
Hospital size stratum (beds) | ||
Small (< 200) | 0.0025 [− 0.25; 0.26] | 0.91 [0.69, 1.13] |
Medium (200–500) | − 0.34 [− 0.56; − 0.071] | 0.84 [0.72, 0.97] |
Large (≥ 500) | − 0.067 [− 0.46; 0.35] | 0.98 [0.86, 1.09] |
All | −0.12 [− 0.28; 0.054] | 0.93 [0.86, 1.01] |