Table 2.

Trends in patient characteristics in United States dialysis patients

Patient CharacteristicAugust 2010August 2011August 2012August 2013
Age (yr)63 (52, 73)63 (52, 73)63 (52, 73)63 (53, 73)
Vintage (yr)2.7 (1.1, 5.1)2.8 (1.2, 5.5)2.9 (1.3, 5.7)2.9 (1.3, 5.7)
Vintage <90 d (%)5.24.14.84.9
Men (%)56555656
Black race (%)32333734
Body mass index (kg/m2)27.0 (22.9, 32.2)27.3 (23.3, 32.1)27.5 (23.4, 32.3)27.2 (23.5, 32.4)
Diabetes (%)64636162
Systolic BP (mmHg)148 (131, 163)147 (131, 163)148 (132, 165)146 (130, 163)
Treatment time (min)212 (195, 240)212 (195, 240)215 (196, 240)215 (199, 241)
Single pool Kt/V1.56 (1.41, 1.72)1.58 (1.43, 1.75)1.62 (1.47, 1.78)1.60 (1.44, 1.77)
Serum phosphorus (mg/dl)4.9 (4.1, 6.0)4.9 (4.1, 5.9)4.8 (3.9, 5.8)4.8 (4.0, 5.8)
Serum parathyroid hormone (pg/ml)247 (163, 379)307 (192, 488)311 (196, 501)322 (198, 496)
Serum albumin (g/dl)3.84 (3.57, 4.06)3.85 (3.59, 4.07)3.89 (3.61, 4.10)3.90 (3.69, 4.17)
Transfusions (%)a2.53.13.3
Catheter use (%)18191616
  • Values are expressed as median (interquartile range) or proportion of patients.

  • a Values for each month reflect proportion of Medicare ESRD beneficiaries transfused; the maximum number of procedures per inpatient claim in this CMS dataset increased from 6 to 25 starting in January 2011 (15,26).