Table 3.
Descriptive and univariate/multivariate analysis of COVID occurrence in vaccinated vs unvaccinated subjects during a 90-days monitoring program
| Unvaccinated group (n. 441) | Vaccinated group (n. 2037) | p | ||||
|---|---|---|---|---|---|---|
| Age, yrs # | ||||||
| Mean (SD) | 44.9 (11.5) | 44.8 (11.7) | 0.9 | |||
| Gender, n (%) * | ||||||
| Female | 351 (79.6) | 1418 (69.9) | <0.001 | |||
| Job category, n (%) * | n. (%) | n. (%) | ||||
| Sanitary workers | 337 (76.4) | 1932 (94.8) | < 0.001 | |||
| COVID-19 occurrence | n. (%) | n. (%) | OR (95% CI) | p | aOR § (95% CI) | p |
| Stratified analysis: | ||||||
| 8 to 30 days later | 12 (2.7) | 2 (0.1) | 0.04 (0.01;0.13) |
< 0.001 | 0.03 (0.01;0.11) |
< 0.001 |
| after 60 days | 19 (4.3) | 8 (0.4) | 0.09 (0.04;0.20) |
< 0.001 | 0.07 (0.03;0.16) |
< 0.001 |
| after 90 days | 22 (5.0) | 13 (0.6) | 0.12 (0.06;0.24) |
< 0.001 | 0.11 (0.05;0.23) |
< 0.001 |
| Subgroup analysis on clinical characteristics: | ||||||
| Asymptomatics | 6 (27.3) | 7 (53.8) | Ref. group | - | Ref. group | - |
| Symptomatics | 16 (72.7) | 6 (46.2) | 0.32 (0.07;1.33) |
> 0.05 | 0.28 (0.04;1.63) |
> 0.05 |
SD: standard deviation; OR: Odds Ratio; 95% CI: confidence interval 95%
# t-test
* chi-squared test
§ Adjustment for gender, age, job categories (sanitary workers, non-sanitary workers)