Table 1. Patient characteristics of the modeling and testing populationa

Modeling Population n = 515Testing Population n = 526
a Mean values (SD) are given for continuous variables.
Age (yr)59.5 (14.9)58.4 (15.7)
Males (%)6260
Primary kidney disease (%)
    diabetes1614
    glomerulonephritis1514
    renal vascular disease1918
    other5153
Serum albumin (g/dl)3.6 (0.6)3.7 (0.6)
Body mass index (kg/m2)24.6 (3.9)24.9 (4.5)
rGFR (mL/min per 1.73 m2)4.9 (2.9)4.9 (3.1)
Renal Kt/Vurea (/wk)1.0 (0.6)1.0 (0.7)
nPNA (g/kg per d)0.93 (0.25)0.95 (0.29)
Modality (%)
    hemodialysis6059
    peritoneal dialysis4041
Physical summary scale SF-3638.7 (9.7)38.9 (9.3)
Mental summary scale SF-3640.8 (11.9)41.4 (12.1)