Table 1.
Association between selected variables and frequency of positive nasopharyngeal tests among healthcare workers in a research and teaching hospital in Milan, Italy, February 24 to July 8, 2020.
| Variable | Workers | Positive Test | ||||
| N | N | % | p-value* | OR** | 95% CI** | |
| All | 2554 | 206 | 8.1 | |||
| Gender | ||||||
| Women | 1787 | 128 | 7.2 | 0.01 | 1.00 | Reference |
| Men | 767 | 78 | 10.2 | 1.56 | 1.15-2.13 | |
| Age (years) | ||||||
| <30 | 220 | 21 | 9.5 | 0.65 | 1.00 | Reference |
| 30-39 | 625 | 56 | 9.0 | 0.93 | 0.54-1.59 | |
| 40-49 | 587 | 47 | 8.0 | 0.83 | 0.47-1.45 | |
| 50-59 | 820 | 62 | 7.6 | 0.79 | 0.46-1.35 | |
| 60+ | 302 | 20 | 6.6 | 0.62 | 0.31-1.21 | |
| Working area | ||||||
| Medicine | 1086 | 102 | 9.4 | 0.06 | 1.52 | 0.42-5.50 |
| Surgery | 583 | 41 | 7.0 | 1.08 | 0.29-4.04 | |
| Technical and management services | 635 | 53 | 8.3 | 1.36 | 0.38-4.88 | |
| Intensive care | 113 | 5 | 4.4 | 0.62 | 0.13-3.00 | |
| Administrative, technical | 137 | 5 | 3.6 | 1.00 | Reference | |
| Occupation | ||||||
| Physicians, including residents | 632 | 55 | 8.7 | 0.07 | 2.04 | 0.78-5.29 |
| Nurses, midwives | 1054 | 81 | 7.7 | 1.74 | 0.68-4.43 | |
| Healthcare assistants | 327 | 34 | 10.4 | 2.56 | 0.97-6.76 | |
| Health technicians*** | 294 | 26 | 8.8 | 2.01 | 0.75-5.40 | |
| Clerical workers, technicians | 247 | 10 | 4.0 | 1.00 | Reference |
Abbreviations: CI, confidence interval; OR, odds ratio.
*From chi-squared test. **From a multivariable logistic regression model including gender, age, working area, and occupation. ***Includes biologists, radiology and laboratory technicians, psychologists, other health technicians