Table 1.
Univariate analysis of variables affecting seasonal influenza vaccination uptake in Beijing during the 2014/2015 influenza season
| Variables | Total participants | Vaccinated participants | Unvaccinated participants | p Value† | ||
| N | n | %* | n | %* | ||
| Sex | ||||||
| Male | 3484 | 778 | 22.3 | 2706 | 77.7 | 0.541 |
| Female | 3614 | 829 | 22.9 | 2785 | 77.1 | |
| Missing | 8 | 3 | 5 | |||
| Age (years) | ||||||
| 18–29 | 1450 | 216 | 14.9 | 1234 | 85.1 | <0.001 |
| 30–39 | 1424 | 212 | 14.9 | 1212 | 85.1 | |
| 40–49 | 1461 | 203 | 13.9 | 1258 | 86.1 | |
| 50–59 | 1391 | 302 | 21.7 | 1089 | 78.3 | |
| ≥60 | 1362 | 672 | 49.3 | 690 | 50.7 | |
| Missing | 18 | 5 | 13 | |||
| Highest education | ||||||
| Primary school or none | 730 | 320 | 43.8 | 410 | 56.2 | <0.001 |
| Junior high school | 1850 | 418 | 22.6 | 1432 | 77.4 | |
| Senior high school | 2167 | 422 | 19.5 | 1745 | 80.5 | |
| 3-year college graduate or above | 2334 | 437 | 18.7 | 1897 | 81.3 | |
| Missing | 25 | 13 | 12 | |||
| Residence | ||||||
| Suburban | 3638 | 805 | 22.1 | 2833 | 77.9 | 0.275 |
| Urban | 3468 | 805 | 23.2 | 2663 | 76.8 | |
| Missing | 0 | 0 | 0 | |||
| Monthly income per capita (yuan)‡ | ||||||
| 0–2000 | 1887 | 509 | 27.0 | 1378 | 73.0 | <0.001 |
| >2000 | 5023 | 1056 | 21.0 | 3967 | 79.0 | |
| Missing | 196 | 45 | 151 | |||
| Family population | ||||||
| 1–2 | 547 | 157 | 28.7 | 390 | 71.3 | <0.001 |
| 3 | 1831 | 487 | 26.6 | 1344 | 73.4 | |
| 4 | 2415 | 458 | 19.0 | 1957 | 81.0 | |
| 5 | 1179 | 264 | 22.4 | 915 | 77.6 | |
| ≥6 | 1130 | 243 | 21.5 | 887 | 78.5 | |
| Missing | 4 | 1 | 3 | |||
| Number of children in the family | ||||||
| 0 | 3915 | 959 | 24.5 | 2956 | 75.5 | <0.001 |
| 1 | 2795 | 548 | 19.6 | 2247 | 80.4 | |
| ≥2 | 300 | 65 | 21.7 | 235 | 78.3 | |
| Missing | 96 | 38 | 58 | |||
| History of chronic illness | ||||||
| Yes | 2149 | 763 | 35.5 | 1386 | 64.5 | <0.001 |
| No | 4957 | 847 | 17.1 | 4110 | 82.9 | |
| Missing | 0 | 0 | 0 | |||
| History of having a fever within the past year | ||||||
| Yes | 894 | 246 | 27.5 | 648 | 72.5 | <0.001 |
| No | 6194 | 1363 | 22.0 | 4831 | 78.0 | |
| Missing | 18 | 1 | 17 | |||
| Recommendations from healthcare workers | ||||||
| Yes | 4168 | 1376 | 33.0 | 2792 | 67.0 | <0.001 |
| No | 2938 | 234 | 8.0 | 2704 | 92.0 | |
| Missing | 0 | 0 | 0 | |||
| Perceived severity of the disease (influenza is a serious disease) | ||||||
| Yes | 4328 | 1044 | 24.1 | 3284 | 75.9 | <0.001 |
| No | 2778 | 566 | 20.4 | 2212 | 79.6 | |
| Missing | 0 | 0 | 0 | |||
| Perceived susceptibility to the disease (I am afraid of catching influenza during an epidemic) | ||||||
| Yes | 4320 | 1055 | 24.4 | 3265 | 75.6 | <0.001 |
| No | 2786 | 555 | 19.9 | 2231 | 80.1 | |
| Missing | 0 | 0 | 0 | |||
| Perceived effectiveness of vaccination (the vaccine can prevent influenza infection) | ||||||
| Yes | 5793 | 1432 | 24.7 | 4361 | 75.3 | <0.001 |
| No | 1313 | 178 | 13.6 | 1135 | 86.4 | |
| Missing | 0 | 0 | 0 | |||
| Perceived side effects of vaccination (I am scared of the vaccine’s side effects) | ||||||
| Yes | 4273 | 921 | 21.6 | 3352 | 78.4 | 0.006 |
| No | 2833 | 689 | 24.3 | 2144 | 75.7 | |
| Missing | 0 | 0 | 0 | |||
| Awareness of the free influenza vaccine policy in Beijing | ||||||
| Yes | 5958 | 1483 | 24.9 | 4475 | 75.1 | <0.001 |
| No | 1148 | 127 | 11.1 | 1021 | 88.9 | |
| Missing | 0 | 0 | 0 | |||
Missing’ indicates the number of people who did not answer this question.
*n/N×100%.
†Pearson’s χ2 test.
‡US$100=680 yuan.