Cox proportional hazard regression assessment of the adjusted association of demographic, military and clinical characteristics with medical release, following a backwards elimination selection process*
| Characteristic | Adjusted HR | 95% CI |
|---|---|---|
| Diagnosis Timing (median split) | ||
| 30 April 2008 or later | Reference | Reference |
| Before 30 April 2008 | 1.77d | 1.01 to 3.11 |
| Delay to care† (tertile split) | ||
| Short: ≤245 days | 1.55 | 0.85 to 2.83 |
| Medium: 246–636 days | Reference | Reference |
| Long: ≥637 days | 2.47c | 1.28 to 4.76 |
| Mental disorder diagnosis case-mix | ||
| PTSD only | 2.17 | 0.77 to 6.07 |
| Depressive disorder only | 2.29 | 0.68 to 7.65 |
| Other single diagnosis only | 0.32 | 0.07 to 1.48 |
| Adjustment disorder only | Reference | Reference |
| PTSD and depressive disorder | 2.88d | 1.05 to 7.88 |
| PTSD and other | 1.99 | 0.72 to 5.48 |
| Any other combination (excluding PTSD) | 1.05 | 0.29 to 3.78 |
| DSM IV—Axis V global assessment of functioning (MI) | ||
| 0–50: Severe symptoms | 8.48c | 1.86 to 38.73 |
| 51–60: Moderate symptoms | 2.44 | 0.52 to 11.53 |
| 61–70: Some mild symptoms | 3.45e | 0.81 to 14.65 |
| 71–100: Transient symptoms | Reference | Reference |
| Occupation categorisation (aggregated) | ||
| FS | 4.98c | 1.62 to 15.32 |
| OPS Support | 2.40c | 1.41 to 4.08 |
| Other | Reference | Reference |
| Rank | ||
| Officer | Reference | Reference |
| SNCM | 4.93d | 1.35 to 18.05 |
| JNCM | 4.12d | 1.15 to 14.73 |
Otherwise, p>0.10.
*A backwards elimination selection process identified the following variables for removal from the final assessment model, listed in their order of removal: live-in dependents, years of service, element, DSM IV—Axis III and age.
†Delay to care is calculated as the latency from most recent Afghanistan-related deployment return date to diagnosis date, for diagnoses attributed to an Afghanistan deployment (n=415).
cp≤0.01.
dp≤0.05.
ep≤0.10.
DSM-IV, Diagnostic and Statistical Manual of Mental Disorders; FS, facility support; JNCM, junior non-commissioned member; MI, multiple imputation used; OPS Support, Operations Support; PTSD, post-traumatic stress disorder; SNCM, Senior non-commissioned member.