Table 2.
Quantitative bias analysis
| IRRT | PC1 (%) | PC0 (%) | RRCD | IRROBS |
|---|---|---|---|---|
| 1.5 | 0 | 100 | 6.2 | 0.24 |
| 1.5 | 10 | 100 | 15 | 0.24 |
| 1.5 | 15 | 100 | 85 | 0.24 |
| 1.5 | 16 | 100 | 3,000 | 0.24 |
| 1.5 | 17 | 100 | 5,000 | 0.26* |
IRROBS, observed incidence rate ratio; IRRT, true incidence rate ratio; PC0, prevalence of the confounder in the unexposed group; PC1, prevalence of the confounder in the exposed group; RRCD, relative risk of the association between the confounder and disease (outcome).
*Using this methodology, an IRROBS of 0.24 could not be achieved, given the other parameters.