Table 1 Baseline demographics and positive rate of total antibodies of study subjects
Variables | Number of population (%) | Number of positive total antibody (%) | 95% CI | P-value |
|---|---|---|---|---|
Total | 5067 (100%) | 313 (6.18%) | 5.51–6.84 |  |
Age (years) | ||||
 40–45 | 1072 (21.16%) | 57 (5.32%) | 3.97–6.67 | 0.02 |
 46–50 | 924 (18.24%) | 48 (5.19%) | 3.76–6.63 | |
 51–55 | 737 (14.55%) | 45 (6.11%) | 4.37–7.84 | |
 56–60 | 767 (15.14%) | 63 (8.21%) | 6.27–1.02 | |
 61–65 | 740 (14.60%) | 37 (5.00%) | 3.43–6.57 | |
 ≥ 66 | 827 (16.32%) | 63 (7.62%) | 5.81–9.43 | |
Sex | ||||
 Male | 2492 (49.18%) | 124 (4.98%) | 4.12–5.83 | < 0.001 |
 Female | 2575 (50.82%) | 189 (7.34%) | 6.33–8.35 | |
Occupation | ||||
 Commercial service personal | 546 (10.78%) | 28 (5.13%) | 3.27–6.98 | < 0.001 |
 Workmen/farmers | 1270 (25.06%) | 40 (3.15%) | 2.19–4.11 | |
 Others | 1312 (25.89%) | 87 (6.63%) | 5.28–7.98 | |
 Community workers | 425 (8.39%) | 17 (4.00%) | 2.13–5.87 | |
 Retirees | 1476 (29.13%) | 138 (9.35%) | 7.86–1.08 | |
 Health workers | 38 (0.75%) | 3 (7.89%) | 0.00–1.69 | |
Smoke | ||||
 No | 3392 (66.94%) | 240 (7.08%) | 6.21–7.94 | < 0.001 |
 Yes | 1446 (28.54%) | 53 (3.67%) | 2.70–4.64 | |
 Ever smoked | 229 (4.52%) | 20 (8.73%) | 5.05–1.24 | |
Self-reported symptom | ||||
 No | 4875 (96.21%) | 248 (5.09%) | 4.47–5.70 | < 0.001 |
 Yes | 192 (3.79%) | 65 (33.85%) | 27.10–40.61 | |
To the hospital for fever or respiratory symptoms since December 2019 | ||||
 No | 4946 (97.61%) | 258 (5.22%) | 4.60–5.84 | < 0.001 |
 Yes | 121 (2.39%) | 55 (45.45%) | 36.45–54.45 | |
Contact with anyone with fever or respiratory symptoms since December 2019 | ||||
 No | 4821 (95.15%) | 262 (5.43%) | 4.79–6.07 | < 0.001 |
 Yes | 246 (4.85%) | 51 (20.73%) | 15.63–25.83 | |
Contact with a SARS-CoV-2 confirmed case since December 2019 | ||||
 No | 4922 (97.14%) | 280 (5.69%) | 5.04–6.34 | < 0.001 |
 Yes | 145 (2.86%) | 33 (22.76%) | 15.85–29.66 | |
Underlying disease | ||||
 No | 3528 (69.63%) | 216 (6.12%) | 5.33–6.91 | 0.81 |
 Yes | 1539 (30.37%) | 97 (6.30%) | 5.09–7.52 | |