Table 4.
Logit scale estimates associated with 1-unit increases in covariate values given by our logistic-regression model for evaluating effect on SARS-CoV-2 transmission risk during an indoor gathering. Wald 95% confidence intervals are given in parentheses.
| Coefficient | β Estimate | Odds ratio | p |
|---|---|---|---|
| Intercept | -0.146 (−0.151, −0.140) | – | – |
| Population density (people/m2) | 2.766 (2.761, 2.771) | 15.891 (15.813, 15.968) | < 0.001 |
| Gathering duration (min) | 0.015 (0.015, 0.015) | 1.015 (1.015, 1.015) | < 0.001 |
| Quanta (quanta/hr) | 0.002 (0.002, 0.002) | 1.002 (1.002, 1.002) | < 0.001 |
| Excess droplet removal rate (%/min) | -0.024 (−0.024, −0.024) | 0.976 (0.976, 0.976) | < 0.001 |
| Air change rate (%/min) | 0.017 (0.017, 0.017) | 1.02 (1.02, 1.02) | < 0.001 |
| Air filtration rate (%/min) | -0.005 (−0.005, −0.005) | 0.995 (0.995, 0.995) | < 0.001 |