Table 2.

Demographic characteristics of patients in Network 5 Study of dialysis adequacya

CharacteristicsTotal Data SetReduced Data Setb
aDM, diabetes mellitus; PTFE, polytetrafluoroethylene; BUN, blood urea nitrogen; URR, urea reduction ratio.
bReduced data set includes all patients from total data set with complete information for all covariates and dialyzed at centers with at least four other patients in reduced data set.
N49713162
Age (yr)59.97 ± 0.2160.15 ± 0.27
Gender
male2511 (50.5%)1653 (52.3%)
female2460 (49.5%)1509 (47.7%)
Race
black3060 (61.6%)1894 (59.9%)
white1678 (33.8%)1106 (35.0%)
other233 (4.7%)162 (5.1%)
Diagnosis
DM1721 (34.6%)1094 (34.6%)
other3250 (65.4%)2068 (65.4%)
Access
PTFE graft2301 (46.3%)1936 (61.2%)
venous catheter697 (14.0%)543 (17.2%)
arteriovenous fistula772 (15.5%)683 (21.6%)
missing1201 (24.2%)
Urea clearance at Qb 200 ml/min (ml/min)189.7 ± 4.5189.7 ± 4.6
Blood flow (ml/min)400.34 ± 1.89400.31 ± 1.25
Time on dialysis (min)204.05 ± 0.69205.22 ± 0.56
Predialysis BUN (mg/dl)59.3 ± 0.358.5 ± 0.3
URR (%)67.8 ± 167.7 ± 0.1