Table 1. Patient demographics and anesthesia/surgery data (N = 3132).
| Variables | Value |
|---|---|
| total subjects | 3132 |
| Age | |
| mean± std (yr) | 53.51±13.80 |
| < = 65 n (%) | 2502 (79.89) |
| < = 65 n (%) | 630 (20.11) |
| Gender, n (%) | |
| Male | 1468 (46.87) |
| Female | 1664 (53.13) |
| BMI, n, mean± std | 23.60±3.60 |
| <25 (%) | 2147 (68.55) |
| > = 25(%) | 985 (31.45) |
| ASA, n (%) | |
| 1 | 335 (10.70) |
| 2 | 2431 (77.62) |
| 3 | 358 (11.43) |
| 4 | 8 (0.25) |
| Type of Surgery, n (%) | |
| General Surgery | 888 (28.35) |
| Hepatobillary Surgery | 415 (13.25) |
| Peripheral Vascular Surgery | 9 (0.29) |
| Cardiovascular Surgery | 458 (14.62) |
| Thoracic Surgery | 7 (0.22) |
| Orthopedics Surgery | 332 (10.60) |
| Neurosurgery | 1 (0.03) |
| Urology | 431 (13.76) |
| Plastic Surgery | 3 (0.10) |
| OB/GYN | 533 (17.02) |
| Others | 55 (1.75) |
| Magnitude of Surgery1, n (%) | |
| minor | 12 (0.38) |
| intermediate | 243 (7.76) |
| major | 1235 (39.43) |
| major plus | 1642 (52.43) |
| Invasiveness of surgery2, n (%) | |
| endoscopic surgery | 1597 (50.99) |
| open surgery | 1535 (49.01) |
| Mode of Anesthesia, n (%) | |
| general | 2988 (95.40) |
| general + regional | 144 (4.60) |
| Total Anesthesia Time3, n, mean± std (h) | |
| mean±std | 2.97±1.49 |
| min-max | 1–14.78 |
| median | 2.67 |
1Magnitude of surgery as below: minor surgery: excision of lesion of skin; drainage of breast abscess, etc. Intermediate surgery: primary repair of inguinal hernia; excision of varicose vein(s) of leg; tonsillectomy/adenotonsillectomy; knee arthroscopy, etc. major surgery: total abdominal hysterectomy; endoscopic resection of prostate; lumbar discectomy; thyroidectomy, etc. major surgery plus: total joint replacement; lung operations; colonic resection; radical neck dissection; neurosurgery; cardiac surgery)
2 Arthroscopic, laparoscopic, etc.
3 Time from induction to discontinuation of anesthetic agents