Table 1. Discovery cohort characteristics.
| Males | Females | |
|---|---|---|
| N | 104 | 78 |
| Age (years) | 64 (23–79) | 63 (24–78) |
| BMI | 25.00 (16.81–36.90) | 24.56 (17.2–44.86) |
| Surgery duration (minutes) | 197.50 (55–535) | 190.00 (50–500) |
| Type of surgery (%) | ||
| 1 upper abdominal | 26.9 | 17.9 |
| 2 lower abdominal | 20.2 | 26.9 |
| 3 xiphopubic | 36.5 | 44.9 |
| 4 bilateral subcostal | 16.3 | 10.3 |
| mgs of morphine first 24 hours | 19 (0–95) | 17 (0–72) |
| mgs of morphine between 24 and 48 hours | 6 (0–54) | 5 (0–34) |
| Total PCA consumption in 48 h (mgs of morphine) | 26 (0–109) | 26 (0–88) |
| Total morphine (including intraoperative bolus) | 37 (8, 119) | 33 (4–98) |
Data are expressed as median (range) unless otherwise stated. BMI = Body Mass Index, PCA = Patient Controlled Analgesia.