Attributable Fraction among people exposed (AFE) to SARS-Cov-2 at work (without and with adjustment), using the three defined outcomes
| AFE without adjustment (%)* | AFE with adjustment (%)* | |
| ‘COVID-19 reported’ | 43.2 (27.5 to 55.8) | 36.7 (18.0 to 51.0) |
| ‘Serology large’ | 29.1 (13 to 42.5) | 24.8 (6.5 to 39.0) |
| ‘Serology strict’ | 27.5 (9.9 to 41.9) | 23.1 (2.9 to 38.7) |
*The range was calculated using the upper and lower limits of the OR at 95% CI.