Tab. III.
Average values of the various parameters considered and percentage change after implementation of the quality improvement scheme.
| A | B | C | |
|---|---|---|---|
| Total microbial contamination — air (CFU/m3) | |||
| operating room - median (Q1-Q3)§ | 15 (10-20) | 3 (0-5) | -80 |
| air-conditioning plant | < 1 | < 1 | |
| Total microbial contamination — surfaces (CFU/plate) | |||
| operating room - median (Q1-Q3) § | 2 (2-4) | 0 (0-1) | -100 |
| Staphylococcus aureus surface (n.) | 3 | 0 | -100 |
| MRSA contamination — surface (n.) | 1 | 0 | -100 |
| Pyrexia above 37.5°C § | 91.26% | 62.14% | -31.91 |
| duration of pyrexia (days) above 37.5°C (mean+S.D)§ | 6.84±3.15 | 3.16±1.05 | -48.54 |
| addditional antibiotic therapy§ | 32.98% | 17.19% | -47.88 |
| days of hospitalization (mean + SD)§ | 7.99 ± 3.24 | 4.92 ± 0.96 | -28.57 |
| Greater revenue(Euro) due to more operations | € 1,441,373.58 |
Legend A = case (before environment improvement); B = control (after environment improvement); C = percentage variation
§
= p ≤ 0.001
SD = Stadard Deviation