Test features of the GAD-7 and GAD-2 scales for detecting anxiety disorders in primary care*
| Diagnosis | Test and cutoff score | Sensitivity (95% CI) | Specificity (CI) | +LR | −LR |
|---|---|---|---|---|---|
| *GAD-7 and GAD-2 = Generalized Anxiety Disorder 7-item and 2-item scales, respectively; LR = likelihood ratio; diagnostic terms defined in glossary. LRs calculated from data in article. | |||||
| Generalised anxiety disorder | GAD-7 ⩾8 | 92% (83 to 97) | 76% (73 to 79) | 3.8 | 0.11 |
| GAD-2 ⩾3 | 86% (76 to 93) | 83% (80 to 85) | 5.1 | 0.17 | |
| Panic disorder | GAD-7 ⩾8 | 82% (70 to 90) | 75% (72 to 78) | 3.3 | 0.24 |
| GAD-2 ⩾3 | 76% (64 to 85) | 81% (79 to 84) | 4.0 | 0.30 | |
| Social anxiety disorder | GAD-7 ⩾8 | 78% (66 to 88) | 74% (71 to 77) | 3.0 | 0.30 |
| GAD-2 ⩾3 | 70% (57 to 81) | 81% (78 to 83) | 3.7 | 0.37 | |
| Post-traumatic stress disorder | GAD-7 ⩾8 | 76% (65 to 85) | 75% (72 to 78) | 3.0 | 0.32 |
| GAD-2 ⩾3 | 59% (48 to 70) | 81% (78 to 84) | 3.1 | 0.51 | |
| Any anxiety disorder | GAD-7 ⩾8 | 77% (70 to 82) | 82% (80 to 85) | 4.3 | 0.28 |
| GAD-2 ⩾3 | 65% (57 to 71) | 88% (85 to 90) | 5.4 | 0.40 | |