Table 5 Re-admission within 3 months after surgery. Evaluation of agreement and sensitivity and specificity between patient registry and case report forms and patient reported data
Assessment | Concordant pairs (%) | Positive Agreement (95%) | Negative Agreement (95% CI) | Kappa (95% CI) | Gwet’s AC1 (95% CI) | Odds of agreement (95% CI) | Sensitivity (95% CI) | Specificity (95% CI) |
|---|---|---|---|---|---|---|---|---|
Questionnaire | 2716 (73) | 0.28 (0.25; 0.31) | 0.84 (0.83; 0.85) | 0.18 (0.15; 0.21) | 0.89 (0.88; 0.90) | 5.5 (4.3; 7.1) | 0.66 (0.60; 0.71) | 0.74 (0.72; 0.75) |
Case report forms | 3228 (91) | 0.50 (0.45; 0.55) | 0.95 (0.94; 0.96) | 0.45 (0.40; 0.50) | 0.61 (0.58; 0.65) | 20.2 (15.3; 26.6) | 0.58 (0.52; 0.64) | 0.94 (0.93; 0.95) |