Table 2. Potential risk factors for mumps seronegativity in the Pienter2 study with corresponding crude and adjusted odds ratios (ORs) and 95% confidence intervals (CIs): results of univariable and multivariable logistic regression analysis.
| Potential risk factor | n | % mumps seronegative (95% CI) | Crude OR* (95% CI) | Adjusted OR (95% CI) |
| Age | ||||
| 0–12 months | 359 | 0.84 (0.80–0.88) | 194.1 (125.9–299.2) | 199.9 (129.5–308.5) |
| 13–23 months | 94 | 0.27 (0.18–0.37) | 13.2 (7.5–23.2) | 34.2 (18.1–64.5) |
| 2–8 years | 866 | 0.2 (0.18–0.23) | 9.2 (6.4–13.3) | 27.3 (16.9–44.2) |
| 9–12 years | 433 | 0.06 (0.04–0.09) | 2.5 (1.5–4.2) | 9.8 (5.4–17.9) |
| 13–21 years | 633 | 0.12 (0.09–0.14) | 4.9 (3.3–7.4) | 19.2 (11.2–32.8) |
| 22–30 years | 593 | 0.09 (0.07–0.12) | 3.9 (2.5–5.9) | 7.0 (4.5–11.0) |
| 31–39 years | 658 | 0.07 (0.05–0.09) | 2.8 (1.8–4.4) | 2.8 (1.8–4.4) |
| 40–59 years | 1355 | 0.04 (0.03–0.05) | 1.6 (1.0–2.4) | 1.6 (1.0–2.4) |
| 60–79 years | 1392 | 0.03 (0.02–0.04) | Reference | Reference |
| Sex | ||||
| Male | 2911 | 0.15 (0.13–0.16) | 1.3 (1.1–1.6) | 1.4 (1.1–1.6) |
| Female | 3472 | 0.11 (0.1–0.12) | Reference | Reference |
| Number of vaccinations | ||||
| Zero doses | 4135 | 0.13 (0.12–0.14) | 4.5 (3.0–6.9) | 4.6 (3.0–7.1) |
| One dose | 1193 | 0.16 (0.14–0.18) | 1.5 (0.97–2.3) | 1.5 (0.97–2.3) |
| Two doses | 1055 | 0.08 (0.06–0.1) | Reference | Reference |
| Degree of urbanisation | ||||
| Very high (≥2.500 addresses per km2) | 1399 | 0.13 (0.11–0.14) | Reference | Reference |
| High (1.500–2.500 addresses per km2) | 2846 | 0.12 (0.11–0.14) | 1.1 (0.9–1.4) | 1.2 (0.9–1.5) |
| Moderately high (1.000–1.500 addresses per km2) | 803 | 0.15 (0.13–0.18) | 1.4 (1.0–1.9) | 1.5 (1.1–2.1) |
| Low (500–1.000 addresses per km2) | 589 | 0.10 (0.08–0.13) | 0.8 (0.6–1.2) | 0.9 (0.6–1.3) |
| Very low (<500 addresses per km2) | 746 | 0.12 (0.09–0.14) | 0.9 (0.6–1.2) | 0.9 (0.7–1.3) |
| Region | ||||
| North–East | 1505 | 0.13 (0.11–0.15) | Reference | |
| Central | 1121 | 0.11 (0.09–0.13) | 0.9 (0.7–1.2) | |
| North–West | 1527 | 0.13 (0.12–0.15) | 0.99 (0.8–1.3) | |
| South–West | 1125 | 0.13 (0.11–0.15) | 0.9 (0.7–1.2) | |
| South–East | 1105 | 0.12 (0.10–0.14) | 1.0 (0.8–1.4) | |
| Ethnicity | ||||
| Dutch | 4869 | 0.12 (0.11–0.13) | Reference | |
| First generation other Western | 153 | 0.10 (0.06–0.16) | 1.8 (1.0–3.2) | |
| Second generation other Western | 292 | 0.11 (0.08–0.15) | 0.8 (0.5–1.3) | |
| First generation Turkey or Morocco | 215 | 0.14 (0.1–0.19) | 1.3(0.8–2.0) | |
| Second generation Turkey or Morocco | 129 | 0.22 (0.15–0.3) | 0.8 (0.5–1.3)) | |
| First generation Surinam. Aruba orNetherlands-Antilles | 219 | 0.1 (0.06–0.14) | 1.2 (0.7–1.9) | |
| Second generation Surinam. Aruba orNetherlands-Antilles | 138 | 0.2 (0.14–0.28) | 0.9 (0.5–1.4) | |
| First generation other non-Western | 230 | 0.12 (0.08–0.17) | 1.3 (0.8–2.0) | |
| Second generation other non-Western | 138 | 0.35 (0.27–0.43) | 1.2 (0.7–2.0) |
*
Adjusted for age and gender.