Table 2.
Demographic and anthropometric characteristics of the patients at baseline (#: p < 000.1 versus 1 and 2, ##p < 0.0001 versus 3). BMI, body mass index; SD, standard deviation
| Group | 1 | 2 | 3 | 4 | p-value |
|---|---|---|---|---|---|
| Number | 409 | 577 | 180 | 761 | N/A |
| Females (%) | 312 /76.3) | 442 (76.6) | 152 (84.4) | 561 (73.3) | 0.02 |
| Mean age (SD) | 39.3 (10.2) | 40.6 (10.7) | 41.5 (10.4) | 43.3 (11.6) # | < 0.001 |
| Mean BMI (SD) | 45.4 (7.5) | 44.7 (5.7) | 43.9 (5.2) | 44.8 (6.7) | 0.08 |
| Primary procedures (%) | 367 (89.7) | 529 (91.7) | 174 (96.7) | 657 (86.3) ## | < 0.001 |