Table 3.

Selected characteristics of persons with tubulointerstitial kidney disease (versus other kidney disease) on kidney biopsy

Selected CharacteristicTubulointerstitial Kidney Disease, n=43Other Kidney Disease, n=44
Age48 (11)a38 (12)
Women6 (14)b13 (30)
Hypertensionc14 (33)19 (43)
Diabetesc7 (16)6 (14)
Serum albumin, g/dl4.2 (0.9)b3.5 (0.9)
 Low serum albumind6 (14)19 (43)
 Missing4 (9)
Serum potassium, mEq/L4.0 (0.7)b4.4 (0.8)
 Low serum potassiume6 (14)3 (7)
 Missing3 (7)
Hematuriaf5 (12)14 (32)
Pyuriaf20 (47)21 (48)
Urine dipstick protein negativef35 (81)a13 (30)
  • Numbers are mean (SD) or N (%). Diabetes was defined as self-reported or physician-diagnosed diabetes.

  • a P<0.001.

  • b P<0.05.

  • c Hypertension was defined as self-reported or physician-diagnosed hypertension, systolic BP ≥140 mm Hg, or diastolic BP ≥90 mm Hg.

  • d Serum albumin <3.5 g/dl.

  • e Serum potassium <3.5 mEq/L.

  • f Hematuria was defined as more than three urine red blood cells per high power field. Pyuria was defined as more than three urine white blood cells per high power field. Urine dipstick protein trace or nil was categorized as negative.