Table 2 Independent risk factors for the occurrence of large outbreaks (≥ 7 patients) as determined by multiple logistic regression analysis with stepwise variable selection
From: Health care workers causing large nosocomial outbreaks: a systematic review
Risk factor | # all NO | Odds ratio | 95% confidence interval | p-value |
|---|---|---|---|---|
departments | ||||
surgery | 76 | 0.42 | 0.19–0.92 | 0.030 |
gynecology | 20 | 6.89 | 1.55–30.63 | 0.011 |
pediatrics | 9 | 0.05 | 0.00–0.45 | 0.008 |
occurrence after 1989 | ||||
reference value: no | 71 | 1.00 | n. d. | 0.024 |
yes | 72 | 0.48 | 0.22–1.06 | 0.068 |
aware of carrier status | ||||
reference value: no | 116 | 1.00 | n. d. | 0.024 |
yes | 14 | 0.11 | 0.02–0.55 | 0.008 |
transmission | ||||
unknown | 13 | 0.16 | 0.03–0.75 | 0.020 |