Table 4.

Mortality rates and Cox regression results by phosphate category

Serum phosphate levelNo. of PatientsCrude Mortality Rateper 1000 Person-Years(No. of Deaths)Adjusted HRa(95% CI)
mg/dlmmol/L
<2.5<0.81201101.7 (54)0.95 (0.69–1.32)
2.5–2.9990.81–0.9699684102.6 (180)Reference
3.0–3.4990.97–1.12991098125.1 (327)1.15 (0.95–1.39)
3.5–3.9991.13–1.2899887162.7 (309)1.32 (1.09–1.61)
4.0–4.4991.29–1.4499388192.8 (144)1.34 (1.05–1.71)
4.5–4.9991.45–1.6199141256.9 (62)1.83 (1.33–2.51)
≥5.0≥1.6291304.7 (38)1.90 (1.30–2.79)
  • a Adjusted for age, race, gender, prevalent diabetes, ischemic heart disease, cerebrovascular disease, congestive heart failure, acute renal failure, calcium intake from medications, hemoglobin, serum calcium, the inverse of baseline creatinine, time-averaged creatinine (area under the curve), slope of creatinine, and maximal creatinine concentration during the baseline period (model 2).