Table 3.
Multivariable analysis for bariatric surgery and the incidence of RA
| Variables | Intention to treat | Per protocol | ||
|---|---|---|---|---|
| HR (95% CI) | P-value | HR (95% CI) | P-value | |
| Surgery vs control group | 0.92 (0.59, 1.46) | 0.74 | 0.86 (0.54, 1.38) | 0.53 |
| Men vs women | 0.64 (0.37, 1.13) | 0.13 | 0.66 (0.37, 1.16) | 0.15 |
| Age, per 10 years | 1.00 (0.68, 1.48) | 0.99 | 0.97 (0.65, 1.45) | 0.89 |
| BMI, per 10 kg/m2 | 1.03 (0.62, 1.71) | 0.90 | 1.04 (0.63, 1.74) | 0.87 |
| Obesity duration, per 10 years | 1.13 (0.85, 1.50) | 0.40 | 1.16 (0.87, 1.55) | 0.31 |
| ESR, per 10 mm/h | 1.04 (0.85, 1.27) | 0.68 | 1.04 (0.85, 1.27) | 0.69 |
| CRP, per 10 mg/L | 1.28 (1.06, 1.55) | 0.01 | 1.29 (1.07, 1.56) | 0.007 |
| Current or former smoker, yes vs no | 1.63 (0.99, 2.67) | 0.05 | 1.69 (1.02, 2.81) | 0.04 |
The adjusted HRs were calculated using a Cox proportional hazards model based on baseline data.