Table 8.
Results from receiver operating characteristics (ROC) Curve Analyses for EBQ-18 total score across different diagnostic groups.
| Sample | Cut-off Score | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | AUC (95% CI) |
|---|---|---|---|---|---|---|
| BN (n =35) vs. Control (n = 61) | >50 | 85.71 (69.4–95.2) | 96.72 (88.7–99.6) | 93.7 (79.2–98.2) | 92.2 (84.0–96.4) | 0.97 ** (0.92–0.99) |
| BED (n =19) vs. Control (n = 61) | >46 | 100.00 (82.4–100.0) | 95.08 (86.3–99.0) | 86.4 (67.8–95.0) | 100.00 | 0.99 ** (0.93–1.00) |
| AN-BP (n = 10) vs. Control (n = 61) | >46 | 40.00 (12.2–73.8) | 95.08 (86.3–99.0) | 57.1 (25.9–83.6) | 90.6 (85.3–94.1) | 0.69 (0.57–0.79) |
| AN-R (n = 24) vs. Control (n = 61) | ≤23 | 58.33 (36.6–77.9) | 78.69 (66.3–88.1) | 51.9 (37.4–66.0) | 82.8 (74.6–88.7) | 0.68 ** (0.57–0.78) |
EBQ-18 = Eating Beliefs Questionnaire 18-item version, CI = Confidence Intervals, PPV = Positive predictive value, NPV = Negative predictive value, AUC = Area under the curve, BN = bulimia nervosa, BED = binge eating disorder, AN-BP = anorexia nervosa binge/purge type, AN-R = anorexia nervosa restrictive type, ** = p < 0.001.