Table 1.
Demographic Data of Participants Who Completed or Did Not Complete the Questionnaire Follow-up
| Characteristic | ICE-Q and IES-R Completed | ICE-Q and IES-R Not Completed | P Value |
|---|---|---|---|
| Valid (missing) | 517 (0) | 772 (2) | |
| Age, yr, median (IQR) | 60.0 (48.5–69.0) | 61.0 (47.0–71.0) | 0.46 |
| Male, n (%) | 305 (59.0) | 463 (59.9) | 0.77 |
| APACHE II score | |||
| Valid (missing) | 491 (26) | 750 (24) | |
| Mean (SD) | 20.58 (6.93) | 21.16 (7.49) | 0.17 |
| Length of ICU stay, d, median (IQR) | 6.74 (3.66–12.67) | 6.76 (3.70–11.86) | 0.43 |
| Duration of ventilation, d, median (IQR) | 3.44 (1.70–8.40) | 4.0 (1.86–8.08) | 0.25 |
| Length of hospital stay, d | |||
| Valid (missing) | 516 (1) | 771 (3) | |
| Median (IQR) | 27.0 (15.0–48.75) | 19.0 (10.0–34.0) | <0.001 |
| Case mix: proportion medical, n (%) | 274 (52.9) | 482 (62.4) | <0.001 |
| Medical specialty, n (%) | |||
| General medicine | 147 (28.9) | 299 (38.7) | |
| Cardiology | 33 (6.4) | 44 (5.7) | |
| Gastrointestinal | 29 (5.6) | 32 (4.1) | |
| Respiratory | 26 (5.0) | 35 (4.5) | |
| Ear/nose/throat | 11 (2.1) | 13 (1.7) | |
| Neurology | 5 (1.0) | 18 (2.3) | |
| Renal | 6 (1.2) | 13 (1.7) | |
| Other | 17 (3.3) | 28 (3.6) | |
| Surgical specialty, n (%) | |||
| General surgery | 156 (30.2) | 188 (24.3) | |
| Vascular | 24 (4.6) | 43 (5.6) | |
| Transplant | 30 (5.8) | 12 (1.6) | |
| Orthopedics | 19 (3.7) | 27 (3.5) | |
| Cardiac | 5 (1.0) | 5 (0.6) | |
| Neurosurgery | 0 (0) | 4 (0.5) | |
| Other | 9 (1.7) | 11 (1.4) | |
| Source of admission, n (%) | 0.02 | ||
| Operating room | 171 (33.0) | 198 (25.6) | |
| Emergency department | 119 (23.0) | 241 (31.2) | |
| High dependency unit | 101 (19.5) | 129 (16.7) | |
| Other ward in hospital | 69 (13.3) | 100 (12.9) | |
| Other hospital | 23 (4.4) | 41 (5.3) | |
| Other ICU | 16 (3.1) | 18 (2.3) | |
| Other immediate care area | 12 (2.3) | 18 (2.3) | |
| Other | 6 (1.2) | 17 (2.2) |
Definition of abbreviations: APACHE II = Acute Physiology and Chronic Health Evaluation II; ICE-Q = Intensive Care Experience Questionnaire; IES-R = Impact of Events Scale-Revised; IQR = interquartile range.
P value denotes comparison using Mann-Whitney U test for age, and duration variables; independent sample t test for APACHE II; chi (2) for sex and case mix (medical or surgical). Unless stated, the variable contains no missing values.