| Characteristics | Patient no. (%) | Group Ia (%) | Group IIb (%) |
| Gender |
|
|
|
| Male | 527 (73.9) | 382 (73.2) | 145 (75.9) |
| Female | 186 (26.1) | 140 (26.8) | 46 (24.1) |
| Age group (years) |
|
|
|
| 12 - 19 | 20 (2.8) | 17 (3.3) | 3 (1.6) |
| 20 - 29 | 139 (19.5) | 100 (19.2) | 39 (20.4) |
| 30 - 39 | 161 (22.6) | 117 (22.4) | 44 (23.0) |
| 40 - 49 | 176 (24.7) | 132 (25.3) | 44 (23.0) |
| 50 - 59 | 139 (19.5) | 96 (18.4) | 43 (22.5) |
| 60 - 69 | 58 (8.1) | 45 (8.6) | 13 (6.8) |
| >70 | 20 (2.8) | 15 (2.9) | 5 (2.6) |
| Weight (kg) |
|
|
|
| <50 | 164 (23.0) | 110 (21.1) | 54 (28.3) |
| 50 - 70 | 475 (66.6) | 347 (66.5) | 128 (67.0) |
| >70 | 74 (10.4) | 65 (12.5) | 9 (4.7) |
| Total | 713 (100) | 522 (73.2) | 191 (26.8) |