3. Subgroup and sensitivity analysis for T1a versus T1b gastric tumors.
Variable | Category | Studies | Sensitivity (95% CI) | Specificity (95% CI) | P value* |
Sample size | >100 | 8 | 0.90 (0.84 to 0.96) | 0.67 (0.50 to 0.85) | 0.49 |
<100 | 12 | 0.85 (0.76 to 0.93) | 0.79 (0.67 to 0.91) | ||
Year of publication | 2000 or later | 11 | 0.90 (0.84 to 0.95) | 0.70 (0.55 to 0.85) | 0.59 |
before 2000 | 9 | 0.84 (0.75 to 0.94) | 0.79 (0.66 to 0.93) | ||
Country | Western | 1 | 1.00 (0.40 to 1.00) | 1.00 (0.69 to 1.00) | N/A |
Eastern | 19 | 0.88 (0.81 to 0.92) | 0.73 (0.61 to 0.82) | ||
EUS array | Radial | 18 | 0.89 (0.82 to 0.93) | 0.72 (0.59 to 0.82) | N/A |
Linear | 1 | 0.50 (0.07 to 0.93) | 0.88 (0.64 to 0.99) | ||
Tumor site | Cardia region | 1 | 0.50 (0.07 to 0.93) | 0.88 (0.64 to 0.99) | N/A |
Any site | 19 | 0.88 (0.82 to 0.92) | 0.74 (0.61 to 0.83) | ||
Quality | High | 18 | 0.84 (0.79 to 0.89) | 0.75 (0.64 to 0.86) | 0.05 |
Low | 2 | 0.98 (0.96 to 1.00) | 0.64 (0.26 to 1.00) |
CI: confidence interval EUS: endoscopic ultrasonography *P values are from likelihood ratio test for model with and without the covariate, to identify diagnostic performance differences across variable categories.