Table 1 Participant characteristics
|  | Total (n = 573) | AZ group (n = 263) | M group (n = 310) | p-valuea |
|---|---|---|---|---|
Age (years) | 64 ± 12 | 62 ± 15 | 67 ± 9 |  < 0.0001 |
Sex, female | 279 (49%) | 137 (52%) | 142 (46%) | 0.13 |
Vaccination dose | Â | Â | Â | 0.002 |
 First dose | 478 (83%) |  | 271 (87%) |  |
 Second dose | 98 (17%) | 204 (78%) | 39 (13%) |  |
Injected site | Â | Â | Â | 0.78 |
 Left arm | 492 (86%) | 227 (86%) | 265 (85%) |  |
 Right arm | 81 (14%) | 36 (14%) | 45 (15%) |  |
Time interval between PET and vaccination (days) | 51 ± 29 | 50 ± 30 | 53 ± 29 | 0.41 |