Table 2.

Risk for CKD by diagnostic codes and ESRD among Olmsted County, MN, stone formers and control subjectsa

OutcomeStone Formers (n = 4066)Control Subjects (n = 10,150)HR (95% CI)
Events15 yr (%)bEvents15 yr (%)b
Any CKD diagnostic code44020.068413.01.67 (1.48 to 1.88)
Individual CKD diagnoses (ICD-9 code)
    chronic renal failure (585)1637.82835.91.46 (1.20 to 1.77)
    diabetic nephropathy (250.4)934.21302.61.81 (1.38 to 2.36)
    proteinuria (791.0)613.0931.71.66 (1.20 to 2.29)
    nephritis and nephropathy (583)372.4661.51.41 (0.94 to 2.10)
    hypertensive renal disease (403)120.5380.80.78 (0.41 to 1.50)
    other (mostly nonspecific renal failure and azotemia)1457.32014.01.83 (1.48 to 2.27)
ESRD or death with CKD231.4430.71.34 (0.81 to 2.23)
    maintenance dialysis120.8260.41.15 (0.58 to 2.29)
    kidney transplant140.8210.51.67 (0.85 to 3.29)
    death with CKD50.250.12.53 (0.73 to 8.74)
Mortality35514.094416.00.95 (0.84 to 1.07)
  • a CI, confidence interval; CKD, chronic kidney disease; HR, hazard ratio; ICD-9, International Classification of Diseases, Ninth Revision.

  • b Cumulative incidence over 15 yr.