Demographic characteristics of study patients
| Characteristic | Total(N = 16713) | Complaint associated with admission(N = 151) | No complaint associated with admission(N = 16562) | p value |
|---|---|---|---|---|
| *Data missing in 3.6% (n = 607) observations. | ||||
| †Data missing in 2.9% (n = 448) observations. | ||||
| Mean (SD) age (years) | 50.8 (17.6) | 49.2 (15.8) | 50.8 (17.6) | 0.23 |
| Sex, n (%) female | 7278 (43.6%) | 67 (44.4%) | 7211 (43.5%) | 0.84 |
| Race, n (%) white* | 14130 (87.7%) | 136 (92.5%) | 13994 (87.7%) | 0.08 |
| No (%) major complications | 2099 (12.6%) | 29 (19.2%) | 2070 (12.5%) | 0.01 |
| Median (IQR) length of stay (days) | 4 (2–7) | 5 (2–8) | 4 (2–7) | 0.02 |
| No (%) emergency or urgent admissions | 6286 (37.6%) | 62 (41.1%) | 6224 (37.6%) | 0.38 |
| No (%) with no co-morbid illnesses† | 6853 (42.1%) | 54 (38.6%) | 6799 (42.2%) | 0.39 |
| No (%) general surgeon service | 4124 (24.l7%) | 40 (26.5%) | 4084 (24.7%) | 0.60 |
| No (%) commercial insurance source | 10673 (63.9%) | 98 (64.9%) | 10575 (63.9%) | 0.79 |
| No (%) discharged home | 15000 (89.8%) | 136 (90.1%) | 14864 (89.8%) | 0.90 |