Table 2 Comparison of patients with missing or non-assessable variables for HISS classification and patients with complete data
Characteristics | Classified according to HISS N = 960 | Not classified according to HISS N = 365 | p-values |
|---|---|---|---|
Questionnaire responders | |||
Yes | 855 (89.1%) | 128 (35.1%) | <0.001 |
Time of CT examination | |||
Weekend/Holiday | 446 (46.5%) | 105 (28.2%) | <0.001 |
Trauma mechanism | |||
Injury while being hospitalized | 5 (0.5%) | 29 (8.0%) | <0.001 |
Male | 581 (60.5%) | 173 (47.4%) | <0.001 |
Age | |||
Median | 30 years | 52 years | <0.001 |
Clinical affiliation of CT ordering doctor | <0.001 | ||
GP emergency clinic (in hospital) | 322 (33.5%) | 74 (20.3%) | |
Neurosurgical department | 167 (17.4%) | 20 (5.5%) | |
Other hospital department | 102 (10.6%) | 147 (40.3%) | <0.001 |
Trauma team | 309 (32.2%) | 8 (2.2%) | |
External GP (not in hospital) | 60 (6.3%) | 116 (31.8%) | |
CT findings | |||
Traumatic findings (%) | 91 (9.5%) | 12 (3.3%) | <0.001 |
Admittance to hospital? | |||
Yes | 593 (61.8%) | 196 (53.7) | 0.007 |
Neurosurgical intervention? | |||
Yes | 12 (1.3%) | 0 (0%) | 0.027 |