Table 2.
Multivariable logistic regression analysis for factors associated with the presence of PTSD symptomology
| PTSS-10 sum score | Adjusted ORa (95% CI) | ||
| Patients with scores > 35 (n = 24) | Patients with scores < 35 (n = 76) | ||
| Patients admitted to the ICU (%) | 71% | 57% | 4.3 (1.11 to 16.5) |
| Females (%) | 54% | 37% | 3.5 (1.2 to 10.6) |
| Age (years; mean ± SD) | 52.9 ± 14.9 | 59.8 ± 14.1 | 0.93b (0.89 to 0.98) |
| APACHE II score (mean ± SD) | 10.7 ± 5.8 | 9.1 ± 5.0 | 1.1c (1.002 to 1.25) |
| ≥ 1 Relaparotomy (%) | 63% | 59% | 3.8 (0.86 to 16.8) |
| Hospital stay (days; median [25th to 75th percentile])d | 46 (28 to 54) | 33 (21 to 59) | 2.2e (0.8 to 5.8) |
aThe odds ratio (OR) has been adjusted for sex, age, Acute Physiology and Chronic Health Evaluation (APACHE) II score, ≥ 1 relaparotomy and length of hospital stay. bPer one-year increase in age, the odds ratio (OR) for having post-traumatic stress disorder (PTSD) symptoms decreased by 0.93. cPer one-point increase in APACHE II score, the OR for having PTSD symptoms increased by 1.1. dIn the logistical model hospital stay is log to the base 10 transformed. eFor one patient hospital discharge dates were missing, and therefore information regarding length of hospital stay was missing; imputation was done using the mean duration of stay for the non-ICU stay group; one patient was missing APACHE II score data. PTSS-10, Post-traumatic Stress Syndrome 10-question inventory; SD, standard deviation.