Table 3.
Risk-factor analysis for MRSA colonization in HCWs.
| Risk factor | MRSA negative (n = 693) | MRSA positive (n = 33) | Fisher's exact test | Logistic regression* | ||||
|---|---|---|---|---|---|---|---|---|
| Odds ratio | p (FE)* | 95%CI (FE) | Odds ratio | p (FE) | 95%CI (FE) | |||
| Physicians | 82 | 1 | 0.23 | 0.162 | 0.31–1.72 | 0.7 | 0.7 | 0.63–7.79 |
| Nurses | 485 | 29 | 3.11 | 0.030 | 1.08–8.96 | 2.81 | 0.15 | 0.69–11.43 |
| Staff without direct contact with patients | 109 | 3 | 0.55 | 0.460 | 0.17–1.85 | – | – | – |
| Unknown profession | 20 | 0 | 0.97 | 1.000 | 0.96–0.98 | – | – | – |
| Previous MRSA carrier | 16 | 5 | 7.56 | 0.002 | 2.58–22.09 | 7.44 | 0.01 | 2.2–24.8 |
| Occupation on ICU | 102 | 9 | 2.17 | 0.077 | 0.98–4.81 | 2.05 | 0.12 | 0.84–4.96 |
| Occupation with new-born | 16 | 1 | 1.32 | 0.551 | 0.17–10.28 | – | – | – |
| Occupation in foreign countries | 3 | 0 | 1.00 | 1.000 | 1–1 | – | – | – |
| Contact with MRSA carriers without protective clothing | 68 | 4 | 1.31 | 0.549 | 0.45–3.84 | – | – | – |
| Contact with MRSA carriers with protective clothing | 227 | 16 | 1.92 | 0.088 | 0.95–8.87 | 1.04 | 0.94 | 0.39–2.7 |
| Home-care of relatives | 14 | 2 | 3.13 | 0.162 | 0.68–14.37 | 4.28 | 0.097 | 0.77–23.76 |
| Contact with MRSA carriers at home | 7 | 2 | 6.32 | 0.059 | 1.26–31.7 | 6.63 | 0.063 | 0.9–48.91 |
| Atopic dermatitis | 33 | 3 | 2.00 | 0.221 | 0.58–6.90 | – | – | – |
| Paronchyia | 1 | 0 | 1.00 | 1.000 | 1–1 | – | – | – |
| Acne | 13 | 3 | 5.23 | 0.032 | 1.42–19.34 | 4.38 | 0.049 | 1.008–19.07 |
| Otitis | 4 | 1 | 5.38 | 0.208 | 0.59–49.55 | – | – | – |
| Open wounds | 5 | 0 | 1.00 | 1.000 | 1–1 | – | – | – |
| Chronic inflammatory bowel disease | 1 | 1 | 21.63 | 0.089 | 1.32–353.62 | 73.12 | 0.005 | 3.66–1457.33 |
| Sinusitis | 23 | 0 | 0.97 | 0.619 | 0.96–0.98 | – | – | – |
| Diabetes mellitus | 8 | 1 | 2.68 | 0.344 | 0.325–22.05 | – | – | – |
| Rhinitis | 25 | 2 | 1.72 | 0.350 | 0.39–7.61 | – | – | – |
| Other chronic diseases | 64 | 3 | 0.98 | 1.000 | 0.29–3.3 | – | – | – |
| Antibiotics | 81 | 4 | 1.04 | 1.000 | 0.36–3.04 | – | – | – |
| Hospitalization for >24 h in the last 6 months | 23 | 1 | 0.91 | 1.000 | 0.12–6.95 | – | – | – |
| Hospitalization for >24 h in the last 6–12 months | 24 | 0 | 0.97 | 0.620 | 0.95–0.98 | – | – | – |
| Hospitalization for >24 h in a foreign country | 0 | 1 | 0.45 | 0.715 | 0.6–3.37 | – | – | – |
| Contact with farm animals | 27 | 2 | 1.59 | 0.384 | 0.36–7 | – | – | – |
| Thereof contact with pigs | 17 | 1 | 1.24 | 0.570 | 0.16–9.63 | – | – | – |
| Contact with domestic animals | 265 | 16 | 1.52 | 0.270 | 0.76–3.06 | – | – | – |
| Contact with raw meat within last 12 h | 62 | 5 | 1.82 | 0.218 | 0.678–4.88 | – | – | – |
| Acute illness | 32 | 3 | 2.07 | 0.209 | 0.6–7.13 | – | – | – |
*
Risk factors with p < 0.2 in univariate analysis (Fisher's exact test) were included in logistic regression.