Table 3.
Effect of the Variables Related to Assessment of Comorbid Anxiety Disorders
| OCD | PD | AGO | PTSD | SP | SPP | GAD | |
| Lifetime vs 1-y rates | |||||||
| Lifetime (%/m) | 8.3/14 | 11.7/11 | 7.1/7 | 14.0/9 | 11.0/7 | 14.8/6 | 24.8/5 |
| 1-y (%/m) | 18.0/3 | 18.0/2 | NA/0 | 13.8/5 | 15.7/2 | NA/0 | 11.7/3 |
| Difference (χ2) | 16.11 | 1.73 | NA | 0.01 | 1.80 | NA | 8.60 |
| P value (2 tailed) | <.001 | NS | NA | NS | NS | NA | .007 |
| Used the SCID vs did not use the SCID | |||||||
| Used the SCID (%/m) | 13.1/23 | 8.3/15 | 1.8/7 | 5.5/9 | 15.7/9 | 2.8/7 | 3.9/6 |
| No SCID (%/m) | 10.5/11 | 16.0/8 | 10.8/5 | 19.1/11 | 13.5/7 | 17.5/4 | 22.8/8 |
| Difference (χ2) | 4.62 | 14.72 | 32.97 | 58.92 | 1.08 | 62.16 | 80.79 |
| P value (2 tailed) | .063 | <.001 | <.001 | <.001 | NS | <.001 | <.001 |
| Used only the SCID vs supplemented the SCID with other assessments | |||||||
| SCID only (%/m) | 7.8/12 | 7.9/12 | 0.8/5 | 3.8/7 | 13.3/7 | 2.2/5 | 2.8/4 |
| SCID + other (%/m) | 20.3/11 | 10.2/3 | 3.8/2 | 9.6/2 | 25.6/2 | 4.4/2 | 6.9/2 |
| Difference (χ2) | 61.13 | 1.05 | 5.37 | 9.52 | 14.78 | 1.96 | 5.28 |
| P value (2 tailed) | <.001 | NS | .041 | .004 | <.001 | NS | .043 |
| Used the DSM-IV vs DSM-III-R criteria | |||||||
| DSM-IV (%/m) | 12.9/24 | 8.1/13 | 3.5/7 | 7.7/14 | 15.2/12 | 5.0/7 | 9.5/11 |
| DSM-III-R (%/m) | 8.6/9 | 11.5/8 | 8.0/5 | 23.7/6 | 14.3/4 | 12.9/4 | 17.8/2 |
| Difference (χ2) | 10.44 | 4.15 | 8.33 | 67.23 | 0.16 | 18.52 | 7.55 |
| P value (2 tailed) | .002 | .083 | .008 | <.001 | NS | <.001 | .012 |
| Diagnostic hierarchy suspended vs not suspended | |||||||
| Suspended (%/m) | 17.7/4 | 13.7/5 | 17.9/4 | 14.9/5 | 33.0.3 | 30.4/2 | 26.6/3 |
| Not suspended (%/m) | 18.4/7 | 19.4/1 | 0.0/1 | NA/0 | 7.5/2 | 3.2/1 | NA/0 |
| Difference (χ2) | 0.03 | 0.65 | 6.46 | NA | 27.29 | 8.87 | NA |
| P value (2 tailed) | NS | NS | .022 | NA | <.001 | .006 | NA |
| PTSD diagnosis allowed for trauma related to psychosis versus not allowed | |||||||
| Allowed (%/m) | NA | NA | NA | 39.1/2 | NA | NA | NA |
| Not allowed (%/m) | NA | NA | NA | 9.13/18 | NA | NA | NA |
| Difference (χ2) | NA | NA | NA | 111.17 | NA | NA | NA |
| P value (2 tailed) | NA | NA | NA | <.001 | NA | NA | NA |
Note: OCD, obsessive-compulsive disorder; PD, panic disorder; AGO, agrophobia; PTSD, post-traumatic stress disorder; SP, social phobia; SPP, simple phobia; GAD, generalized anxiety disorder; m, number of studies; SCID, Structured Clinical Interview for DSM Disorders; DSM, Diagnostic and Statistic Manual of Mental Disorders; NS = P > .1; NA, not applicable.