Table 3.

Cox proportional hazards models for 24-hour urine phosphorus excretion with all-cause mortality

VariableUPE TertilesContinuous
Tertile 1 (<508 mg/d)Tertile 2 (508–748 mg/d)Tertile 3 (>748 mg/d)Per 300 mg/d Higher UPE (95% CI)P Value
Events/at risk (n/n)138/294112/29390/293340/880
Unadjusted: Hazard ratio (95% CI)1.00 (reference)0.74 (0.58 to 0.95)0.56 (0.43 to 0.74)0.81 (0.72 to 0.91)<0.001
Model 1: Hazard ratio (95% CI)1.00 (reference)0.84 (0.65 to 1.08)0.72 (0.54 to 0.95)0.91 (0.80 to 1.03)0.14
Model 2: Hazard ratio (95% CI)1.00 (reference)0.92 (0.71 to 1.20)0.78 (0.56 to 1.07)0.96 (0.84 to 1.11)0.59
  • Model 1; adjusted for age, sex, oral estrogen use (women), race, and estimated GFR. Model 2; adjusted for age, sex, oral estrogen use (women), race, estimated GFR, diabetes, hypertension, smoking, body mass index, cholesterol, HDL cholesterol, C-reactive protein, and urine calcium excretion. UPE, urinary phosphorus excretion; CI, confidence interval.