Table 5.
Distribution and prevalence of 3-month Probable PTSD and/or MDE in subgroups defined by pre-MVC lifetime history stratified by joint 2-week and 8-week disorders†
| Pre-MVC lifetime PTSD and/ or MDE |
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yes (n=630) |
No (n=676) |
Total (n=1306) |
|||||||||||||
| Distribution | Outcome prevalence | Distribution | Outcome prevalence | Distribution | Outcome prevalence | ||||||||||
| % | (SE) | % | (SE) | n‡ | % | (SE) | % | (SE) | n§ | % | (SE) | % | (SE) | n‡ | |
|
|
|||||||||||||||
| Joint 2-week & 8-week disorders§ | |||||||||||||||
| 2-week | 71.0** | (1.9) | 59.2** | (2.4) | 447 | 34.2 | (1.9) | 23.1 | (2.9) | 231 | 52.0 | (1.4) | 46.9 | (1.9) | 679 |
| 8-week | 69.9** | (1.9) | 61.6** | (2.4) | 441 | 24.3 | (1.7) | 34.3 | (3.9) | 164 | 46.3 | (1.4) | 54.2 | (2.0) | 605 |
| Either 2-week or week | 82.4** | (1.6) | 55.9** | (2.2) | 520 | 41.6 | (1.9) | 21.7 | (2.6) | 281 | 61.3 | (1.4) | 43.9 | (1.8) | 801 |
| Both 2-week and 8-week | 58.5** | (2.0) | 66.6** | (2.5) | 369 | 16.9 | (1.5) | 42.7 | (4.8) | 114 | 37.0 | (1.4) | 61.0 | (2.2) | 483 |
| Neither 2-week nor 8 week | 17.6 | (1.6) | 2.9 | (1.6) | 111 | 58.4 | (1.9) | 1.6 | (0.6) | 395 | 38.7 | (1.4) | 1.9 | (0.6) | 505 |
| 2-week only | 12.5** | (1.4) | 24.4** | (4.9) | 79 | 17.3 | (1.5) | 3.9 | (1.9) | 117 | 15.0 | (1.0) | 12.1 | (2.4) | 196 |
| 8-week only | 11.4* | (1.3) | 36.0* | (5.8) | 7.2 | 7.4 | (1.0) | 15.2 | (5.3) | 50 | 9.3 | (0.8) | 27.5 | (4.1) | 122 |
| 8-week among 2-week (persistence) | 82.6 | (1.9) | 66.6* | (2.5) | 369 | 49.4 | (3.4) | 42.7 | (4.8) | 114 | 71.1 | (1.8) | 61.0 | (2.2) | 483 |
| 8-week, among no 2-week (late onset) | 39.4,** | (3.8) | 36.0* | (5.8) | 72 | 11.2 | (1.6) | 15.2 | (5.3) | 50 | 19.4 | (1.6) | 27.5 | (4.1) | 122 |
| Total | 46.6,** | (2.0) | 630 | - | - | 9.9 | (1.2) | 676 | - | - | 27.6 | (1.2) | 1306 | ||
Significantly different from the subgroup with no pre-MVC lifetime history
Denotes significance after correction for the false discovery rate.
Abbreviations. PTSD, posttraumatic stress disorder; MDE, major depressive episode; MVC, motor vehicle collision
To reduce redundancy, each survey-based assessment of Probable PTSD and MDE is referred to in the table and subsequent footnotes as “PTSD” and “MDE.” Estimates based on multiply-imputed data (30 imputations) and frequencies may not always sum to 100.
Denominator n's.
2-week and 8-week disorders defined as any threshold or subthreshold PTSD or MDE.