Seropositivity to influenza A(H1N1)pdm09
| Seropositive, n (%) | Seronegative, n (%) | Odds ratio (95% CI) | P-value | |
|---|---|---|---|---|
| Occupation | ||||
| GPs | 63 (21.4) | 231 (78.6) | 1.0 (0.7 to 1.4) | |
| Practice nurses | 90 (23.3) | 297 (76.7) | 1.1 (0.8 to 1.5) | 0.835 |
| Receptionists | 71 (21.9) | 253 (78.1) | Reference | |
| Age, years | ||||
| <45 | 91 (26.8) | 248 (73.2) | 1.5 (1.1 to 2.0) | 0.016 |
| >45 | 133 (19.9) | 535 (80.1) | Reference | |
| Sex | ||||
| Male | 34 (22.7) | 116 (77.3) | 1.0 (0.7 to 1.6) | 0.915 |
| Female | 190 (22.2) | 667 (77.8) | Reference | |
| Ethnicity | ||||
| European | 196 (22.0) | 693 (78.0) | 0.9 (0.6 to 1.4) | 0.725 |
| Other | 28 (23.5) | 91 (76.5) | Reference | |
| Seasonal vaccine | ||||
| Vaccinated | 204 (23.7) | 657 (76.3) | 2.1 (1.3 to 3.4) | 0.003 |
| Not vaccinated | 19 (13.0) | 127 (87.0) | Reference | |
| Influenza symptoms | ||||
| One or more symptoms | 167 (23.3) | 550 (76.7) | 1.3 (0.9 to 1.8) | 0.096 |
| None | 57 (19.3) | 238 (80.7) | Reference | |
| Believed had influenza | ||||
| Yes | 53 (33.5) | 105 (66.5) | 2.0 (1.4 to 2.9) | 0.0004 |
| No | 171 (20.0) | 682 (80.8) | Reference | |
| Worked in community-based assessment centre | ||||
| Yes | 47 (23.7) | 151 (76.3) | 1.1 (0.8 to 1.6) | 0.503 |
| No | 173 (21.5) | 631 (78.5) | Reference | |
| Children aged ≤18 years at home | ||||
| Yes | 104 (22.7) | 355 (77.3) | 1.1 (0.8 to 1.4) | 0.702 |
| No | 116 (21.5) | 424 (78.5) | Reference | |