Table 1.
Description of the study population
| Variable | N | % |
| Gender | ||
| Female | 196 | 74 |
| Male | 69 | 26 |
| Age* | ||
| < 30 years | 115 | 43.4 |
| 30 – < 40 years | 41 | 15.5 |
| 40 – < 50 years | 68 | 25.7 |
| 50 – 67 years | 41 | 15.5 |
| Country of birth | ||
| Germany | 214 | 80.8 |
| foreign country | 51 | 19.2 |
| BCG-vaccination | ||
| No | 125 | 47.2 |
| Yes | 140 | 52.8 |
| TST history | ||
| No TST in medical history | 33 | 12.5 |
| Negative TST in history | 151 | 57 |
| Positive TST in history | 81 | 30.6 |
| Job category | ||
| Nurse | 94 | 35.5 |
| Physician | 17 | 6.4 |
| Other professions | 154 | 58.1 |
| QFT-IT | ||
| Negative | 246 | 92.8 |
| Positive | 19 | 7.2 |
| Workplace | ||
| Admission ward | 18 | 6.8 |
| Infection ward | 110 | 41.5 |
| Other | 137 | 51.7 |
| Reason for testing | ||
| Serial examination | 246 | 92,8 |
| Contact tracing | 19 | 7,2 |
| Total | 265 | 100 |
* mean age 34.7, standard deviation 12.6