Table 4. Univariable and multivariable models of hazard ratios for kidney stones.
| Univariable | Multivariable | |||||
|---|---|---|---|---|---|---|
| Risk Factor | HR | 95% CI | P value | HR | 95% CI | P value |
| Age at surgery (per 10 yr) | 1.04 | 0.88-1.23 | 0.65 | 0.99 | 0.82-1.20 | 0.93 |
| Male Sex | 1.11 | 0.70-1.76 | 0.64 | 1.00 | 0.62-1.61 | 0.99 |
| Hypertension | 0.89 | 0.61-1.28 | 0.52 | 1.11 | 0.73-1.69 | 0.62 |
| Diabetes | 0.51 | 0.35-0.75 | 0.0005 | 0.55 | 0.37-0.82 | 0.004 |
| Arthritis | 0.46 | 0.31-0.65 | <0.001 | 0.77 | 0.50-1.2- | 0.25 |
| Sleep apnea | 0.67 | 0.47-0.97 | 0.034 | 1.00 | 0.66-1.50 | 0.99 |
| Type of bariatric surgery | ||||||
| Control (referent) | 1.00 | na | na | 1.00 | na | na |
| RYGB | 2.49 | 1.63-3.81 | <0.001 | 2.13 | 1.30-3.49 | 0.003 |
| Malabsorptive | 5.23 | 3.02-9.05 | <0.001 | 4.15 | 2.16-8.00 | <0.001 |
| Restrictive | 0.50 | 0.07-3.69 | 0.50 | 0.46 | 0.06-3.45 | 0.45 |
Abbreviations: HR: hazard ratio; CI” confidence interval; na: not applicable; RYGB Roux-en-Y gastric bypass