Characteristic | Surgery | No surgery | p value |
---|---|---|---|
Sex | < 0.001§ | ||
Male | 139 | 287 | |
Female | 585 | 653 | |
Substance use | < 0.001§ | ||
Yes | 9 | 33 | |
No | 715 | 907 | |
BMI, kg/m2; mean ± SD | 48.87 ± 8.19 | 47.67 ± 7.92 | 0.003§ |
Age, yr; mean ± SD | 46.78 ± 10.54 | 48.42 ± 11.86 | 0.003§ |
Distance from the hospital, km; mean ± SD | 119.73 ± 179.49 | 113.64 ± 177.57 | 0.5 |
Operational period (referral)† | 0.047§ | ||
1 | 478 | 575 | |
2 | 246 | 347 | |
Operational period (orientation)‡ | < 0.001§ | ||
1 | 233 | 155 | |
2 | 490 | 507 |
Note: BMI = body mass index. *The Pearson χ2 test and Student t test were used as appropriate. †Binary variable indicating if a patient was referred in Period 1 or Period 2. ‡Binary variable indicating if a patient attended orientation in Period 1 or Period 2. §p < 0.05 was considered statistically significant.