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Demographic data on the three groups, mean (SD)
| Group 1 | Group 2 | Group 3 | |
|---|---|---|---|
| Age (yrs) | 56 (11) | 53 (9) | 55 (12) |
| Weight (kg) | 72 (9) | 82 (8) | 74 (7) |
| IBW (kg) | 70 (8) | 78 (8) | 71 (6) |
| Male/female | 2/5 | 4/3 | 3/4 |
| Operation time (min) | 237 (37) | 251 (46) | 226 (31) |
IBW = ideal body weight
