Table 1.

Demographic, clinical, and laboratory characteristics of 117,644 patients undergoing maintenance hemodialysis across deciles of height

CharacteristicTotal Study Sample (n=117,644)Height DecileP Valueb
1 (n=13,477) W: 1.40–<1.52 M: 1.40–<1.642 (n=15,414) W: 1.52–<1.53 M: 1.64–<1.703 (n=18,608) W: 1.53–<1.60 M: 1.70–<1.714 (n=7,719) W: NAa M: 1.71–<1.755 (n=13,340) W: 1.60–<1.61 M: 1.75–<1.766 (n=7044) W: 1.61– <1.64 M: NAa7 (n=12,427) W: 1.64–<1.66 M: 1.76–<1.808 (n=10,151) W: 1.67– <1.70 M: 1.80– <1.819 (n=11,514) W: .70–<1.73 M: 1.81–<1.8810 (n=7950) W: 1.73–2.00 M: 1.88–2.00
Age (yr)61±1564±1763±1663±1562±1562±1562±1561±1560±1559±1557±15<0.001
Women (%)4542366404810044432548<0.001
Diabetes mellitus (%)5759585854576157565554<0.001
Weight (kg)75.3±20.363.2±15.668.6±16.069.6±17.278.1±17.275.4±18.972.2±18.679.4±19.581.7±20.387.0±21.390.0±23.8<0.001
Mortality (%)5156525251515050514946<0.001
Race (%)
 White4333384248454150474943<0.001
 Asian39542211<1<1<1<0.001
 Black3218232728354035404148<0.001
 Hispanic142925181412108653<0.001
 Other710987675544<0.001
Dialysis vintage (%)
 <6 mo53525454545352535353500.88
 6–<24 mo18181818191818191919180.004
 2–<5 yr18181718171819171818190.74
 ≥5 yr11121110101111111110120.001
Primary insurance (%)
 Medicare6364646463646463626161<0.001
 Medicaid58644464444<0.001
 Private1091091010910101010<0.001
 Other1411131215141315151716<0.001
 Missing88888898989<0.001
Marital status (%)
 Married4040423749403141404337<0.001
 Divorced765767878780.79
 Single2323212121232323252529<0.001
 Widowed1315141761321111189<0.001
 Missing1818181818171718171717<0.001
Kt/V (dialysis dose)1.52±0.341.62±0.361.56±0.341.59±0.341.47±0.331.53±0.341.58±0.321.50±0.331.47±0.321.43±0.211.43±0.31<0.001
KRU2.52±1.232.46±0.992.49±1.112.47±1.032.59±1.472.54±1.322.44±0.872.55±1.322.56±1.382.61±1.452.60±1.32<0.001
Comorbid conditions (%)
 Hypertension79787979807980798079800.95
 Cancer54445545554<0.001
 AHD2221222222211722212117<0.001
 Heart failure2727282927272528272625<0.001
 Other cardiac disease55656556565<0.001
 PVD1110111111111112111111<0.001
 Cerebrovascular accident777887687770.03
 HIV infection22222222222<0.001
 COPD65665656665<0.001
 Tobacco use63444665666<0.001
Serum laboratory values
 Albumin (g/dl)3.68±0.443.69±0.433.69±0.443.67±0.433.72±0.453.68±0.443.64±0.423.68±0.443.68±0.443.71±0.453.68±0.45<0.001
 Creatinine (mg/dl)8.07±3.147.82±3.028.01±3.137.65±2.968.44±3.258.04±3.127.49±2.728.11±3.138.28±3.248.60±3.368.62±3.30<0.001
 TIBC (mg/dl)208±43.4206±42.6208±43.2208±43.8211±42.7209±44.1205±43.7209±43.5208±43.0210±43.2207±42.9<0.001
 Carbon dioxide (mg/dl)22.3±2.8722.3±2.8922.2±2.9022.3±2.8922.3±2.8322.3±2.8522.3±2.8922.3±2.8522.3±2.8822.2±2.8422.3±2.840.92
 Calcium (mg/dl)9.19±0.689.14±0.699.14±0.689.20±0.699.15±0.669.21±0.699.26±0.699.21±0.689.22±0.689.21±0.689.25±0.680.003
 Phosphorus (mg/dl)5.59±1.435.51±1.445.52±1.435.51±1.415.58±1.465.57±1.415.54±1.405.61±1.415.67±1.455.73±1.455.75±1.42<0.001
 Ferritin (ng/ml)574±511552±480534±477535±478500±457515±446534±459503±444506±460493±441508±437<0.001
 nPCR (g/d)0.95±0.240.99±0.260.97±0.250.96±0.250.96±0.240.94±0.240.93±0.240.94±0.240.93±0.230.93±0.230.91±0.23<0.001
 Blood hemoglobin (g/dl)12.0±1.3012.1±1.2812.1±1.2912.0±1.3012.1±1.2912.0±1.3112.0±1.2912.0±1.2912.0±1.3212.0±1.3112.0±1.33<0.001
 WBC (×103/μl)7.43±1.397.48±2.327.50±2.447.51±2.367.45±2.487.41±2.347.51±2.427.42±2.487.38±2.547.29±2.257.28±2.32<0.001
 Lymphocytes (%)20.5±7.5120.3±7.2920.3±7.3320.4±7.4919.9±7.4420.6±7.5520.9±7.5120.6±7.5920.6±7.5820.8±7.6821.2±7.750.02
  • Values expressed with a plus/minus sign are mean±SD. W, women; M, men; NA, not applicable; KRU, residual renal function; AHD, atherosclerotic heart disease; PVD, peripheral vascular disease; COPD, chronic-obstructive pulmonary disorder; TIBC, total iron-binding capacity; nPCR, normalized protein ctabolic rate expressed as normalized protein nitrogen appearance; WBC, white blood cell.

  • a Height ranges for the 3rd and 4th deciles of female height were not different because of large statistical representation of heights in this range. This was similarly observed in men in the 5th and 6th deciles of male heights. Thus, no female patients or male patients were represented in the 4th or 6th height deciles, respectively.

  • b A nonparametric test for trend was used to compare demographic and clinical variables among the 10 height deciles.