Characteristics of the study population
| Cross-sectional | Retrospective cohort | p Value | ||||||
| n | % | 95% CI | n | % | 95% CI | |||
| Sex | Women | 5975 | 52.5 | 51.6 to 53.4 | 547 | 50.3 | 47.3 to 53.2 | n.s. |
| Age | Mean (SD) | 40.2 | 26.9 | 42.1 | 26 | 31.3 to 36.9 | 0.02 | |
| Department | Medical wards | 4045 | 35.5 | 34.7 to 36.4 | 371 | 34.1 | 31.3 to 36.9 | .001 |
| Surgery/gynaecology | 3898 | 34.3 | 33.4 to 35.1 | 435 | 40.0 | 37.1 to 42.9 | ||
| Obstetrics | 1241 | 10.9 | 10.3 to 11.5 | 109 | 10.0 | 8.2 to 11.8 | ||
| Paediatrics | 1701 | 14.9 | 14.3 to 15.6 | 128 | 11.8 | 9.9 to 13.7 | ||
| Intensive care | 494 | 4.3 | 4 to 4.7 | 45 | 4.1 | 3 to 5.3 | ||
| Hospital complexity | Tertiary | 10 520 | 92.5 | 92 to 92.9 | 1011 | 92.9 | 91.4 to 94.4 | n.s. |
| Secondary (with surgery and ICU wards) | 859 | 7.5 | 7.1 to 8 | 77 | 7.1 | 5.6 to 8.6 | ||
| Admission type | Unplanned admission | 8031 | 70.6 | 69.7 to 71.4 | 726 | 66.7 | 63.9 to 69.5 | n.s. |
| Planned admission | 2099 | 18.4 | 17.7 to 19.2 | 190 | 17.4 | 15.2 to 19.7 | ||
| Intrinsic risk factors | Yes | 6128 | 53.9 | 52 to 54.8 | 615 | 56.5 | 53.6 to 5.5 | n.s. |
| No | 5251 | 46.1 | 45.2 to 47.1 | 473 | 43.5 | 40.5 to 46.4 | ||
| Extrinsic risk factors | Yes | 8484 | 74.6 | 73.8 to 75.4 | 844 | 77.6 | 75.1 to 80.1 | 0.03 |
| No | 2895 | 25.4 | 24.6 to 26.2 | 244 | 22.4 | 19.9 to 24.9 | ||
| Patients studied | 11 379 | 1088 | ||||||
n.s., not significant (p>0.05).