Table 1.

Patient characteristics by treatment practice

Mean (SD) or %Treatment Time <210 minKt/V <1.2Ultrafiltration Volume >5.7%KD <3 mEq/L
NoYesNoYesNoYesNoYes
Patients (n)28,878853618,824727326,8803970660629,629
Age (yr)61.0 (14.6)64.6 (15.3)a62.0 (14.8)61.2 (14.5)b62.5 (14.6)57.2 (14.9)a64.4 (14.5)61.3 (14.8)a
Male6049a5372a5855a5459a
Black1315a1413a1313a1314a
Vintage4.2 (5.5)2.0 (3.8)a4.9 (5.7)2.6 (4.3)a3.7 (5.2)6.3 (6.2)a1.8 (3.5)4.1 (5.5)a
Body mass index24.9 (5.8)24.1 (5.2)a24.2 (5.6)25.4 (5.9)a25.0 (5.7)21.5 (4.0)a25.8 (5.9)24.5 (5.6)c
Catheter2335a1828a2311a4122a
Comorbid conditions
 coronary artery disease4546464246405443a
 other cardiovascular3532c3631a3435a3933a
 cerebrovascular disease1618a17161714a2016a
 congestive heart failure353735333433a4234a
 diabetes38403544a3835b4637a
Laboratory results
 hemoglobin (g/dl)10.9 (1.7)10.5 (1.7)a11.1 (1.6)10.5 (1.8)a10.9 (1.7)10.6 (1.6)10.8 (1.7)10.8 (1.7)a
 albumin (g/dl)3.7 (0.5)3.6 (0.6)a3.7 (0.5)3.7 (0.6)a3.7 (0.5)3.8 (0.5)a3.5 (0.6)3.7 (0.5)a
 potassium (mEq/L)5.0 (0.8)4.8 (0.8)a5.0 (0.8)4.9 (0.8)a4.9 (0.8)5.2 (0.8)a4.7 (0.8)5.0 (0.8)a
 phosphorous (mg/dl)5.6 (1.8)5.6 (1.9)a5.5 (1.7)5.7 (1.9)a5.5 (1.8)5.9 (1.9)a5.4 (1.9)5.6 (1.8)a
 parathyroid hormone (pg/ml)177 (275)187 (282)172 (272)184 (269)b178 (271)175 (297)a190 (269)178 (280)
 creatinine (mg/dl)9.2 (3.2)8.0 (3.1)a9.2 (3.0)9.2 (3.5)a8.9 (3.1)10.1 (3.2)a7.3 (3.0)9.2 (3.2)a
 ferritin (ng/ml)285 (431)247 (403)c314 (456)203 (332)a286 (429)222 (439)b278 (410)273 (426)a
  • Serum parathyroid hormone and ferritin values are summarized as median (interquartile range). Significance values obtained from logistic and mixed linear regression models adjusted for the Dialysis Outcomes and Practice Patterns Study phase and accounted for facility clustering effects. KD, dialysate potassium.

  • a P<0.001 for “yes” versus “no” column.

  • b 0.05≤P<0.10 for “yes” versus “no” column.

  • c 0.001≤P<0.05 for “yes” versus “no” column.