Table 4.
Cox proportional hazard regression analysis showing the relationship of the oxidative balance score with incident chronic kidney disease.
| Oxidative Balance Score Tertile | Numbers, n | New-Onset Cases, n | Follow-Up Period, Person–Year | Incidence Rate Per 1000 Person Years | Unadjusted | Adjusted |
|---|---|---|---|---|---|---|
| HR (95% CI) | HR (95% CI) | |||||
| Total | ||||||
| Continuous (per 1 increment) | 0.90 (0.87–0.93) | 0.94 (0.91–0.97) | ||||
| T1 | 1923 | 288 | 28,539.5 | 10.09 | 1 (reference) | 1 (reference) |
| T2 | 1757 | 203 | 26,507.1 | 7.66 | 0.76 (0.63–0.91) | 0.77 (0.63–0.93) |
| T3 | 2115 | 187 | 32,302.5 | 5.79 | 0.57 (0.48–0.69) | 0.71 (0.58–0.87) |
| p for trend | <0.001 | <0.001 | ||||
| Men | ||||||
| Continuous (per 1 increment) | 0.95 (0.91–0.99) | 0.95 (0.90–0.99) | ||||
| T1 | 798 | 97 | 12,012.2 | 8.08 | 1 (reference) | 1 (reference) |
| T2 | 779 | 90 | 11,802.2 | 7.63 | 0.94 (0.71–1.25) | 0.80 (0.59–1.08) |
| T3 | 1087 | 99 | 16,552.1 | 5.98 | 0.74 (0.56–0.98) | 0.70 (0.51–0.95) |
| p for trend | 0.031 | 0.022 | ||||
| Women | ||||||
| Continuous (per 1 increment) | 0.86 (0.83–0.90) | 0.93 (0.89–0.98) | ||||
| T1 | 1125 | 191 | 16,527.3 | 11.56 | 1 (reference) | 1 (reference) |
| T2 | 978 | 113 | 14,704.9 | 7.68 | 0.66 (0.53–0.84) | 0.76 (0.59–0.98) |
| T3 | 1028 | 88 | 15,750.4 | 5.59 | 0.48 (0.37–0.62) | 0.73 (0.55–0.96) |
| p for trend | <0.001 | 0.015 |
Adjusted for age, education level, monthly household income, protein/total energy intake (%), mean blood pressure, serum total cholesterol level, and serum C-reactive protein level. Abbreviations: HR, hazard ratio; CI, confidence interval.