Table 2.
Mean (std.) of the values of the outcome measures for the two BMI groups at 6 months and one year. P values of the group and time effect (before surgery, 6 months and one year).
| Variable | Nonobese (n = 25) | Obese (n = 39) | P value (group) | P value (time) |
|---|---|---|---|---|
| OKS 6 months | 28.7 (10.4) | 27.4 (9.0) | 0.620 | <0.001 |
| OKS 1 year | 27.1 (11.0) | 25.7 (9.0) | 0.328 | |
| SF12 PCS 6 months | 38.2 (10.4) | 36.8 (10.5) | 0.349 | <0.001 |
| SF12 PCS 1 year | 41.1 (11.5) | 36.6 (9.9) | 0.310 | |
| SF12 MCS 6 months | 52.3 (9.6) | 52.6 (9.5) | 0.289 | 0.436 |
| SF12 MCS 1 year | 53.4 (8.2) | 52.2 (8.9) | 0.820 |
PCS: physical component summary of the SF12, MCS: mental component summary of SF12.