Characteristics of the included and excluded general ward patients
| Variable | Included with IHCA (cases), n=127 | Included without IHCA (controls), n=254 | Excluded with IHCA, n=85 | Included IHCA vs excluded IHCA, p-value |
|---|---|---|---|---|
| Age, years (range) | 73 (62–80) | 73 (64–80) | 74 (66–82) | 0.27 |
| Sex, male, n (%) | 76 (60) | 152 (60) | 52 (61) | 0.85 |
| Clinical affiliation: | 0.54 | |||
| Medicine, n (%) | 80 (63) | 160 (63) | 50 (59) | |
| Surgery, n (%) | 47 (37) | 94 (37) | 35 (41) | |
| Main reasons for admission according to the ICD10 codes: | 0.06 | |||
| Neoplastic disease C00–D48, n (%) | 11 (9) | 22 (9) | 7 (8) | |
| Circulatory system I00–99, n (%) | 15 (12) | 30 (12) | 11 (13) | |
| Respiratory system J00–99, n (%) | 11 (9) | 22 (9) | 19 (22) | |
| Injury/trauma S00–T98, n (%) | 11 (9) | 22 (9) | 6 (7) | |
| Gastrointestinal system K00–93, n (%) | 10 (8) | 20 (8) | 5 (6) | |
| Musculoskeletal system M00–99, n (%) | 7 (6) | 14 (6) | 0 (0) | |
| Infectious diseases A00–B99, n (%) | 10 (8) | 20 (8) | 4 (5) | |
| Symptoms, signs and abnormal clinical and laboratory findings not elsewhere classified R00–99, n (%) | 37 (29) | 74 (29) | 19 (22) | |
| Hospital length of stay when IHCA occurred, median days (range) | 3 (2–8) | n/a | 5 (2–9) | 0.77 |
| In-hospital mortality, n (%) | 97 (76) | 6 (2) | 65 (77) | 0.87 |
| Age-adjusted Charlson comorbidity index, points (range) | 3 (5–7) | 3 (4–6) | 4 (5–6) | 0.74 |
| Categorised burden of age-adjusted Charlson comorbidity index: | ||||
| Minimal 0–2 points, n (%) | 21 (16) | 55 (22) | n/a | |
| Low 3–5 points, n (%) | 58 (46) | 108 (42) | n/a | |
| Moderate 6–7 points, n (%) | 28 (22) | 60 (24) | n/a | |
| Severe ≥8 points, n (%) | 20 (16) | 31 (12) | n/a |
IHCA = in-hospital cardiac arrest; n/a = not applicable.