HR of human parvovirus B19 (B19V) seroconversions among the day-care employees compared with the women in healthcare (N=847), Finland, 1992–1993
| Women | Seroconversions | Unadjusted | Adjusted | ||||
|---|---|---|---|---|---|---|---|
| Characteristics | N | N | Per cent | HR (95% CI)* | HR (95% CI)† | ||
| Employment | |||||||
| No | 130 | 6 | 4.6 | 1.00 | (Reference) | 1.00 | (Reference) |
| Yes | 717 | 36 | 5.0 | 1.10 | (0.46 to 1.60) | 1.22 | (0.43 to 3.42) |
| Employment-verified occupation | |||||||
| Healthcare worker | 326 | 12 | 3.7 | 1.00 | (Reference) | 1.00 | (Reference) |
| Day-care worker | 331 | 22 | 6.6 | 2.13 | (1.05 to 4.32) | 2.63 | (1.27 to 5.46) |
| Other occupation | 60 | 2 | 3.3 | 0.93 | (0.21 to 4.17) | 0.85 | (0.18 to 4.09) |
| Age, years | |||||||
| 19–24 | 110 | 8 | 7.3 | 1.00 | (Reference) | 1.00 | (Reference) |
| 25–29 | 373 | 14 | 3.8 | 0.63 | (0.26 to 1.50) | 0.48 | (0.18 to 4.09) |
| 30–34 | 265 | 13 | 4.9 | 0.88 | (0.37 to 2.14) | 0.53 | (0.18 to 1.53) |
| 35–48 | 99 | 7 | 7.1 | 1.44 | (0.52 to 4.00) | 0.83 | (0.24 to 2.85) |
| Number of living children | |||||||
| 0 | 369 | 14 | 3.8 | 1.00 | (Reference) | 1.00 | (Reference) |
| 1 | 283 | 13 | 4.6 | 1.29 | (0.60 to 2.75) | 1.38 | (0.60 to 3.18) |
| 2 | 137 | 8 | 5.8 | 1.62 | (0.67 to 3.89) | 1.90 | (0.68 to 5.34) |
| ≥3 | 58 | 7 | 12.1 | 4.81 | (1.92 to 12.0) | 6.27 | (2.04 to 19.2) |
| High infection risk period | |||||||
| No | 473 | 13 | 2.8 | 1.00 | (Reference) | 1.00 | (Reference) |
| Yes | 374 | 29 | 7.8 | 3.53 | (1.83 to 6.81) | 3.91 | (2.01 to 7.59) |
| Capital Region | |||||||
| No | 552 | 34 | 6.1 | 1.00 | (Reference) | 1.00 | (Reference) |
| Yes | 285 | 8 | 2.8 | 0.52 | (0.24 to 1.13) | 0.57 | (0.26 to 1.27) |
| Job seniority, years | |||||||
| 0–4 | 301 | 14 | 4.6 | 1.00 | (Reference) | ||
| 5–9 | 344 | 17 | 4.9 | 1.10 | (0.54 to 2.23) | ||
| ≥10 | 202 | 11 | 5.5 | 1.43 | (0.64 to 3.16) | ||
*Seven univariable models; the model for employment-verified occupation also includes employment.
†Multivariable model including all variables except job seniority.