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Table 2 Incidence of amputation and multivariate Cox proportional hazards regression analysis measured hazard ratio for PD patients using hypertonic solution

From: Early utilization of hypertonic peritoneal dialysate and subsequent risks of non-traumatic amputation among peritoneal dialysis patients: a nationwide retrospective longitudinal study

  Comparison cohort HPD cohort   
Variable Event PY Rate Event PY Rate Crude HR (95% CI) Hazard ratio (95% CI)
Overall 10 1248 8.01 15 633 23.68 2.98(1.33-6.66) 2.48(1.06-5.79)
Age group         
<50 1 774 1.29 4 311 12.86 10.32(1.15-92.58) 1.20(0.11-12.59)
51-70 8 374 21.35 8 275 29.60 1.41(0.52-3.78) 3.06(0.92-10.22)
>70 1 99 10.08 3 47 63.43 6.24(0.63-61.52) 5.65(0.51-62.54)
  1. *Incidence rate, per 1000 person-years.
  2. HR hazard ratio, CI confidence interval.
  3. Model adjusted for age, sex, hypertension, ischemic heart disease, heart failure and diabetes.