Table 4. Length of hospital stay and rate of in-hospital and post-discharge VTE for patients undergoing general surgical procedures between 1 April 1997 and 31 March 2012.
| Procedure | Median length of stay (IQR) | Total VTE | Total VTE | In-hospital VTE | In-hospital VTE | In-hospital VTE | Post-discharge VTE | Post-discharge VTE | Post-discharge VTE |
|---|---|---|---|---|---|---|---|---|---|
| Number of events | Rate per 1000 patient years | Number of events | Rate per 1000 patient years | Proportion of VTE % | Number of events | Rate per 1000 patient years | Proportion of VTE % | ||
| Antireflux surgery | 2 (1–4) | 7 | 23.3 | 1 | 91.9 | 14.3 | 6 | 20.7 | 85.7 |
| Appendicectomy | 3 (2–5) | 65 | 19.9 | 24 | 154.1 | 36.9 | 41 | 13.2 | 63.1 |
| Bariatric surgery | 2 (1–4) | 4 | 11.0 | 1 | 76.4 | 25.0 | 3 | 8.6 | 75.0 |
| Breast excision | 3 (1–5) | 118 | 22.4 | 17 | 77.6 | 14.4 | 101 | 20.0 | 85.6 |
| Cholecystectomy | 2 (1–3) | 109 | 12.2 | 32 | 102.9 | 29.4 | 77 | 8.9 | 70.6 |
| Colorectal resection | 12 (8–18) | 400 | 85.7 | 178 | 207.9 | 44.5 | 222 | 58.3 | 55.5 |
| Haemorrhoidectomy | 0 (0–1) | 14 | 3.2 | 3 | 85.2 | 21.4 | 11 | 2.6 | 78.6 |
| Hepatopancreatobiliary resection | 11 (8–18) | 31 | 84.6 | 11 | 168.0 | 35.5 | 20 | 66.5 | 64.5 |
| Inguinal hernia repair | 0 (0–1) | 112 | 9.8 | 13 | 90.5 | 11.6 | 99 | 8.8 | 88.4 |
| Esophagogastric resection | 15 (11–21) | 61 | 118.3 | 28 | 246.6 | 45.9 | 33 | 82.1 | 54.1 |
| Small bowel resection | 14 (9–24) | 44 | 103.3 | 30 | 288.9 | 68.2 | 14 | 43.5 | 31.8 |
| Thyroid/parathyroid excision | 2 (1–4) | 16 | 10.1 | 7 | 119.7 | 43.8 | 9 | 5.9 | 56.3 |
| Total | 2 (0–5) | 981 | 23.7 | 345 | 165.4 | 35.2 | 636 | 16.2 | 64.8 |
IQR = interquartile range
VTE = venous thromboembolism