Table 2.
Multiple logistic regression analysis for the factors associated with seasonal influenza vaccination uptake in Beijing during the 2014/2015 influenza season
| Variables | All adults (n=7106) |
Older adults (age≥60) (n=1362) |
Younger adults (age=18–59) (n=5726) |
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| N | Vaccinated % | Adjusted OR (95% CI)† | N | Vaccinated % | Adjusted OR (95% CI)† | N | Vaccinated % | Adjusted OR (95% CI)† | |
| Age (years) | |||||||||
| 18–59 | 5726 | 16.3 | 1.0 (referent) | ||||||
| ≥60 | 1362 | 49.3 | 3.3 (2.8 to 3.9) | ||||||
| Highest education | |||||||||
| Primary school or none | 730 | 43.8 | 1.8 (1.5 to 2.2) | 422 | 58.3 | 1.6 (1.2 to 2.1) | 307 | 24.1 | 1.9 (1.4 to 2.6) |
| Junior high school or above | 6351 | 22.6 | 1.0 (referent) | 929 | 45.1 | 1.0 (referent) | 5405 | 15.8 | 1.0 (referent) |
| Residence | |||||||||
| Suburban | 3638 | 22.1 | 1.0 (referent) | 714 | 51.1 | 1.0 (referent) | 2919 | 15 | 1.0 (referent) |
| Urban | 3468 | 23.2 | 1.3 (1.1 to 1.5) | 648 | 47.4 | 1.0 (0.8 to 1.3)* | 2807 | 17.6 | 1.4 (1.2 to 1.6) |
| History of chronic illness | |||||||||
| Yes | 2149 | 35.5 | 1.5 (1.3 to 1.8) | 902 | 54.3 | 1.9 (1.5 to 2.4) | 1239 | 21.9 | 1.4 (1.2 to 1.7) |
| No | 4957 | 17.1 | 1.0 (referent) | 460 | 39.6 | 1.0 (referent) | 4487 | 14.8 | 1.0 (referent) |
| History of having a fever within the past year | |||||||||
| Yes | 894 | 27.5 | 1.4 (1.1 to 1.7) | 188 | 54.8 | 1.3 (0.9 to 1.8)* | 702 | 20.4 | 1.4 (1.1 to 1.8) |
| No | 6194 | 22 | 1.0 (referent) | 1170 | 48.5 | 1.0 (referent) | 5010 | 15.8 | 1.0 (referent) |
| Recommendations from healthcare workers | |||||||||
| Yes | 4168 | 33 | 4.5 (3.8 to 5.3) | 996 | 59.6 | 5.4 (3.9 to 7.4) | 3160 | 24.6 | 4.5 (3.7 to 5.4) |
| No | 2938 | 8 | 1.0 (referent) | 366 | 21.3 | 1.0 (referent) | 2566 | 6.1 | 1.0 (referent) |
| Perceived susceptibility to the disease (I am afraid of catching influenza during an epidemic) | |||||||||
| Yes | 4320 | 24.4 | 1.2 (1 to 1.4) | 839 | 52.8 | 1.5 (1.2 to 2) | 3469 | 17.6 | 1.1 (0.9 to 1.3)* |
| No | 2786 | 19.9 | 1.0 (referent) | 523 | 43.8 | 1.0 (referent) | 2257 | 14.4 | 1.0 (referent) |
| Perceived effectiveness of vaccination (the vaccine can prevent influenza infection) | |||||||||
| Yes | 5793 | 24.7 | 1.8 (1.5 to 2.2) | 1125 | 51.7 | 1.3 (1.0 to 1.9)* | 4656 | 18.2 | 2.2 (1.7 to 2.8) |
| No | 1313 | 13.6 | 1.0 (referent) | 237 | 38 | 1.0 (referent) | 1070 | 8 | 1.0 (referent) |
| Perceived side effects of vaccination (I am scared of the vaccine’s side effects) | |||||||||
| Yes | 4273 | 21.6 | 0.7 (0.6 to 0.8) | 736 | 46.5 | 0.6 (0.4 to 0.7) | 3525 | 16.3 | 0.8 (0.7 to 1) |
| No | 2833 | 24.3 | 1.0 (referent) | 626 | 52.7 | 1.0 (referent) | 2201 | 16.2 | 1.0 (referent) |
| Awareness of the free influenza vaccine policy in Beijing | |||||||||
| Yes | 5958 | 24.9 | 1.3 (1.1 to1.7) | 1186 | 53 | 1.9 (1.2 to 2.9) | 4755 | 17.9 | 1.2 (0.9 to 1.5)* |
| No | 1148 | 11.1 | 1.0 (referent) | 176 | 24.4 | 1.0 (referent) | 971 | 8.7 | 1.0 (referent) |
The sum of the two age groups was not equal to the sample size of all adults because 18 participants did not answer the question regarding age.
*p>0.05, not significant.
†In the multiple logistic regression analysis, the following variables were not significantly associated with seasonal influenza vaccination uptake (p>0.05): sex, monthly income per capita, family population, number of children in the family and perceived severity of the disease.