Supplementary Table 1.
Determinants of qualitative serology response – results by center
| Characteristics | Bologna | Brescia | Verona | |||
|---|---|---|---|---|---|---|
| N serology (%) | OR (95% CI) | N serology (%) | OR (95% CI) | N serology (%) | OR (95% CI) | |
| Sex | ||||||
| Men | 1748 (99.8%) |
1 (Ref) | 1771 (99.8%) |
1 (Ref) | 1521 (97.8%) |
1 (Ref) |
| Women | 3767 (99.8%) |
1.65 (0.46-5.87) |
4727 (99.9%) |
2.49 (0.47-13.3) |
3601 (98.3%) |
1.41 (0.87-2.27) |
| Age | ||||||
| 10-yr increase | - | 0.31 (0.12-0.83) |
- | 0.85 (0.42-1.71) |
- | 0.38 (0.30-0.48) |
| Job Title | ||||||
| Administration | 217 (100%) |
1 (Ref) | 765 (99.9%) |
1 (Ref) | 361 (95.5%) |
1 (Ref) |
| Physician | 1649 (99.7%) |
NE | 1642 (99.9%) |
1.02 (0.09-11.9) |
1729 (98.7%) |
1.67 (0.85-3.31) |
| Nurse | 1781 (99.8%) |
NE | 2285 (100%) |
1.02 (0.12-34.5) |
1813 (98.5%) |
1.42 (0.75-2.68) |
| Technician | 250 (100%) |
NE | 564 (100%) |
0.58 (0.04-9.61) |
454 (98.3%) |
2.04 (0.86-4.84) |
| Other HCW | 1628 (99.9%) |
NE | 1236 (99.9%) |
1.23 (0.07-20.2) |
765 (97.5%) |
1.16 (0.59-2.27) |
| Time since vaccination | ||||||
| 14-day interval | - | 0.88 (0.53-1.48) |
- | 0.06 (0.01-0.26) |
- | NA |
| Pre-vaccination serology level | ||||||
| 1 SD increase | - | NA | - | 0.40 (0.03-5.84) |
- | 1.11 (0.87-1.42) |
CI, confidence interval; OR, odds ratio, adjusted for sex, age, job title and previous infection, as appropriate; Ref, reference category; NA, not available; NE, not estimable