Table 2. Duration and impairment of twelve-month DSM-IV intermittent explosive disorder.
| Narrow1 | Intermediate-only1 | Broad-only1 | Broad1 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| % | (se) | % | (se) | % | (se) | % | (se) | F2,347 | (p-value) | |
| I. Twelve-month persistence | ||||||||||
| Number of 12-month attacks | 11.8* | (1.4) | 1.3 | (0.1) | 1.3 | (0.1) | 8.5 | (0.9) | 26.7 | (<.001) |
| Number of weeks with attacks | 19.6* | (2.8) | 1.5 | (0.1) | 1.3 | (0.1) | 13.9 | (1.9) | 23.9 | (<.001) |
| II. Severe role impairment (Sheehan Disability Scales) | ||||||||||
| Home | 14.8 | (2.6) | 10.9 | (3.7) | 4.9 | (3.3) | 12.9 | (1.9) | 3.2 | (.20) |
| Work | 11.7 | (2.6) | 12.2 | (3.9) | 5.6 | (3.2) | 11.1 | (2.2) | 1.7 | (.44) |
| Interpersonal | 27.5* | (3.8) | 18.5 | (4.7) | 13.1 | (5.0) | 24.1 | (3.1) | 7.7 | (.022) |
| Social | 22.2 | (3.5) | 17.2 | (4.4) | 14.9 | (5.1) | 20.4 | (2.8) | 1.9 | (.38) |
| Summary | 40.4* | (3.6) | 25.8 | (4.7) | 19.6 | (6.5) | 35.1 | (2.9) | 11.4 | (.003) |
| (n) | (230) | (71) | (49) | (350) | ||||||
*
Significant difference in prevalence across the narrow, intermediate-only, and broad-only sub-samples at the .05 level, two-sided test
1
Narrow = three or more 12-month attacks; Intermediate-only = lifetime narrow and one or two 12-month attacks; Broad-only = lifetime broad and one or two 12-month attacks; Broad = Narrow or Intermediate-only or Broad-only.