Table 1
Overall participant characteristics stratified according to whether they contracted COVID-19
| Variables | Total n=1163 | COVID-19 n=127 | No COVID-19 n=1036 | Test statistic | Significance (p value) |
| Sex ratio (F:M) | 667:494 | 74:53 | 594:441 |
(4)=0.40 | 0.982 |
| Mean age, years (SD) | 44.08 (5.57) | 43.66 (5.64) | 44.14 (5.56) | F(1, 1071)=0.59 | 0.444 |
| BMI, kg/m2 (SD) | 24.72 (3.97) | 24.74 (4.00) | 24.72 (3.97) | F(1, 1071)=0.02 | 0.90 |
| Smoking status, N (never: current: past smoker) | 654:110:102 | 93:10:12 | 561:100:90 |
(2)=2.38 | 0.304 |
| N of household contacts with COVID-19 | 111 | 53 | 58 |
(1)=127.94 | <0.0001* |
| N of work colleagues with COVID-19 | 279 | 49 | 230 |
(3)=27.3 | <0.0001* |
*Indicates p≤0.002, significant difference with Bonferroni correction.
BMI, body mass index.