Table 4. Subgroup Analysis of Patients Who Underwent Major Emergency Surgery.
| Variables | Pre-AITR (n=150) | Post-AITR (n=104) | p value | |
|---|---|---|---|---|
| Age (yr) | 68.0 (51.8–79.0) | 68.5 (53.0–79.8) | 0.792 | |
| Sex (male) | 81 (54.0) | 50 (48.1) | 0.353 | |
| Laboratory test | ||||
| Hemoglobin <10 (g/dL) | 17 (11.3) | 21 (20.2) | 0.052 | |
| Abnormal WBC (103/uL) | 94 (62.7) | 66 (63.5) | >0.999 | |
| Neutrophil count >80 (%) | 88 (58.7) | 60 (57.7) | 0.898 | |
| C-reactive protein >1.0 (mg/dL) | 91 (61.9) | 56 (53.8) | 0.202 | |
| Blood urea nitrogen >20 (mg/dL) | 61 (40.7) | 45 (43.3) | 0.679 | |
| Creatinine >1.0 (mg/dL) | 60 (40.0) | 40 (38.5) | 0.805 | |
| Albumin <3.0 (g/dL) | 45 (30.0) | 25 (24.0) | 0.296 | |
| Total bilirubin >2.0 (mg/dL) | 14 (9.3) | 4 (3.8) | 0.094 | |
| Vital sign | ||||
| SBP <90 (mm Hg) | 12 (8.0) | 7 (6.7) | 0.705 | |
| Pulse rate >100 bpm | 40 (15.7) | 36 (34.6) | 0.174 | |
| Body temperature > 37.8 (°C) | 22 (14.7) | 13 (12.5) | 0.622 | |
| Number of residents on 24-hr shift | 0.511 | |||
| 1 | 31 (20.7) | 16 (15.4) | ||
| 2 | 104 (69.3) | 75 (72.1) | ||
| 3 | 15 (10.0) | 13 (12.5) | ||
| Diagnosis | 0.891 | |||
| Hollow viscus perforation | 102 (68.0) | 69 (66.3) | ||
| Abdominal trauma | 9 (6.0) | 5 (4.8) | ||
| Bowel strangulation | 37 (24.7) | 28 (26.9) | ||
| Other* | 2 (1.3) | 2 (1.9) | ||
| Time from ER arrival to surgery (min) | 413.5 (292.8–558.5) | 409.0 (300.0–557.0) | 0.658 | |
| Length of hospital stay (day) | 13.5 (9.0–23.4) | 15.5 (9.0–25.5) | 0.597 | |
| Mortality | 24 (16.0) | 15 (14.4) | 0.732 | |
AITR, Act to Improve Training Conditions and the Status of Medical Residents; ER, emergency room; SBP, systolic blood pressure.
Data are presented as interquartile range or n (%).
*Foreign body removal, colostomy injury due to dog bite were included in other diagnosis.