Table 1.
Characteristics of study participants, stratified by the COVID-19 vaccine regimen.
| Characteristics a | CoronaVac/ CoronaVac |
AZD1222/ AZD1222 |
CoronaVac/ AZD1222 |
AZD1222/ BNT162b2 |
BNT162b2/ BNT162b2 |
P b |
|---|---|---|---|---|---|---|
| Number of enrolled participants | 332 | 221 | 110 | 128 | 110 | |
| Age, years | 39.0 (30.0–48.0) | 62.6 (52.3–68.3) | 59.8 (44.0–65.2) | 52.3 (30.7–67.5) | 28.7 (22.8–36.9) | <0.001 |
| Age category | <0.001 | |||||
| <60 years | 332 (100) | 73 (33.0) | 55 (50.0) | 73 (57.0) | 110 (100) | |
| ≥60 years | 0 (0) | 148 (67.0) | 55 (50.0) | 55 (43.0) | 0 (0) | |
| Sex | 0.003 | |||||
| Male | 90 (27.1) | 81 (36.7) | 48 (43.6) | 44 (34.4) | 27 (24.6) | |
| Female | 242 (72.9) | 140 (63.3) | 62 (56.4) | 84 (65.6) | 83 (75.4) | |
| Body mass index, kg/m2 | 23.1 (20.9–26.0) | 24.7 (22.0–27.3) | 27.4 (23.7–35.0) | 23.2 (20.3–26.2) | 22.5 (19.8–26.6) | <0.001 |
| Body mass index category | <0.001 | |||||
| Underweight | 20 (6.0) | 10 (4.5) | 2 (1.8) | 8 (6.3) | 14 (12.7) | |
| Normal weight | 201 (60.6) | 108 (48.9) | 40 (36.4) | 78 (60.9) | 56 (50.9) | |
| Overweight | 80 (24.1) | 75 (33.9) | 36 (32.7) | 34 (26.6) | 28 (25.5) | |
| Obese | 31 (9.3) | 28 (12.7) | 32 (29.1) | 8 (6.2) | 12 (10.9) | |
| Cigarette smoking | <0.001 | |||||
| Never smoked | 326 (98.2) | 197 (89.1) | 88 (80.0) | 120 (93.8) | 103 (93.6) | |
| Ever smoked (current and former) | 6 (1.8) | 24 (10.9) | 22 (20.0) | 8 (6.2) | 7 (6.4) | |
| Alcohol consumption | <0.001 | |||||
| Never drunk | 287 (86.5) | 168 (76.0) | 71 (64.6) | 100 (78.1) | 87 (79.1) | |
| Ever drunk (current and former) | 45 (13.5) | 53 (24.0) | 39 (35.4) | 28 (21.9) | 23 (20.9) |
Abbreviations: AZD1222 vaccine, the Oxford-AstraZeneca COVID-19 vaccine; BNT162b2; Pfizer-BioNTech vaccine; COVID-19, coronavirus disease 2019; a Data were presented as number (percentage) for categorical data and median (interquartile range) for continuous data; b The comparisons across five COVID-19 vaccine regimens were performed by the Chi-squared test or the Fisher’s exact test (if less than five observations) for categorical data and by the Wilcoxon rank-sum test for continuous data.