Table 3.
Comparison of metrics between prevalence levels: hazard ratio (HR), odds ratio (OR) or rate ratio (RR), as appropriate, with 95% confidence interval (CI) and p-value
| Metric | Measure | 20% vs 50% prevalence |
80% vs 50% prevalence |
||
|---|---|---|---|---|---|
| Effect size (95% CI) | p-value | Effect size (95% CI) | p-value | ||
| Time to first pursuit | HR | 1.32 (0.95–1.93) | 0.14 | 0.95 (0.64–1.40) | 0.79 |
| Total assessment time span | HR | 0.74 (0.50–1.12) | 0.15 | 0.83 (0.56–1.24) | 0.37 |
| Assessment pursuit time | OR | 1.27 (0.87–1.84) | 0.22 | 0.90 (0.62–1.32) | 0.60 |
| Assessment pursuit rate | RR | 0.91 (0.70–1.18) | 0.47 | 1.07 (0.83–1.37) | 0.60 |
| Pursuit rate | RR | 1.01 (0.98–1.05) | 0.39 | 1.03 (1.00–1.07) | 0.06 |
| Screen coverage | |||||
| Upper | OR | 0.93 (0.78–1.12) | 0.45 | 1.28 (1.07–1.53) | 0.007 |
| Central | OR | 1.06 (0.92–1.23) | 0.39 | 0.82 (0.72–0.95) | 0.008 |
| Lower | OR | 0.96 (0.81–1.13) | 0.63 | 1.11 (0.94–1.31) | 0.22 |
| Total number of identifications | RR | 0.81 (0.62–1.06) | 0.12 | 1.04 (0.81–1.34) | 0.75 |
| Any correct identification | OR | 0.24 (0.08–0.73) | 0.01 | 0.37 (0.12–1.11) | 0.08 |
| Any incorrect identification | OR | 0.66 (0.37–1.19) | 0.17 | 1.11 (0.63–1.97) | 0.71 |
| Videos with polyps | OR | 0.86 (0.35–2.11) | 0.75 | 1.29 (0.54–3.10) | 0.57 |
| Videos without polyps | OR | 0.53 (0.24–1.17) | 0.11 | 1.00 (0.47–2.13) | 1.00 |