Table 2.
Relationship of Combat Exposure Severity Scale and Total vulnerability with PSS onset and current PSS.
| Percentilec of predictor | Predictor is Combat Exposure Severityb | Predictor is Total Vulnerability Count | ||||
|---|---|---|---|---|---|---|
| na | %with PSS onset | %with Current PSS | n | %with PSS onset | %with Current PSS | |
| below 10th | 15 | 0.0% | 0.0% | 10 | 4.3% | 0.0% |
| below 25th | 42 | 7.4% | 0.2% | 38 | 7.4% | 0.5% |
| below 50th | 95 | 12.8% | 3.0% | 84 | 10.1% | 3.8% |
| above 50th | 153 | 31.0% | 19.2% | 164 | 31.6% | 17.1% |
| above 75th | 97 | 46.9% | 30.5% | 85 | 53.8% | 35.0% |
| above 90th | 42 | 69.9% | 55.4% | 45 | 67.0% | 49.6% |
| above 99th | 4 | 88.5% | 27.4% | 6 | 89.4% | 75.4% |
| Odds ratio for trend (95% CI)d | 2.78 (1.67–4.64) | 5.64 (2.53–12.57) | 2.85 (1.89–4.31) | 3.56 (2.28–5.57) | ||
n’s are raw unweighted sample sizes within each weighted percentile group for combat exposure severity or total vulnerability. Weighted sample percents within each percentile category differ slightly from nominal (e.g. below 25th percentile for combat exposure severity has 28.6% of sample) due to ties at percentile cutpoints.
Scale created from factor analysis using the 6 combat exposure variables as indicators
Categories are not mutually exclusive (e.g. veterans above 90th percentile on combat exposure severity are a subset of those above 75th percentile).
Odds ratios corresponding to a 1 standard deviation increase in combat exposure or standardized total vulnerability.