. 2012 May;7(5):765–774. doi: 10.2215/CJN.08850811

Table 1.

Patient characteristics by treatment practice

Mean (SD) or %	Treatment Time <210 min		Kt/V <1.2		Ultrafiltration Volume >5.7%		K_D <3 mEq/L
Mean (SD) or %	No	Yes	No	Yes	No	Yes	No	Yes
Patients (n)	28,878	8536	18,824	7273	26,880	3970	6606	29,629
Age (yr)	61.0 (14.6)	64.6 (15.3)^a	62.0 (14.8)	61.2 (14.5)^b	62.5 (14.6)	57.2 (14.9)^a	64.4 (14.5)	61.3 (14.8)^a
Male	60	49^a	53	72^a	58	55^a	54	59^a
Black	13	15^a	14	13^a	13	13^a	13	14^a
Vintage	4.2 (5.5)	2.0 (3.8)^a	4.9 (5.7)	2.6 (4.3)^a	3.7 (5.2)	6.3 (6.2)^a	1.8 (3.5)	4.1 (5.5)^a
Body mass index	24.9 (5.8)	24.1 (5.2)^a	24.2 (5.6)	25.4 (5.9)^a	25.0 (5.7)	21.5 (4.0)^a	25.8 (5.9)	24.5 (5.6)^c
Catheter	23	35^a	18	28^a	23	11^a	41	22^a
Comorbid conditions
coronary artery disease	45	46	46	42	46	40	54	43^a
other cardiovascular	35	32^c	36	31^a	34	35^a	39	33^a
cerebrovascular disease	16	18^a	17	16	17	14^a	20	16^a
congestive heart failure	35	37	35	33	34	33^a	42	34^a
diabetes	38	40	35	44^a	38	35^b	46	37^a
Laboratory results
hemoglobin (g/dl)	10.9 (1.7)	10.5 (1.7)^a	11.1 (1.6)	10.5 (1.8)^a	10.9 (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)^a	3.7 (0.5)	3.7 (0.6)^a	3.7 (0.5)	3.8 (0.5)^a	3.5 (0.6)	3.7 (0.5)^a
potassium (mEq/L)	5.0 (0.8)	4.8 (0.8)^a	5.0 (0.8)	4.9 (0.8)^a	4.9 (0.8)	5.2 (0.8)^a	4.7 (0.8)	5.0 (0.8)^a
phosphorous (mg/dl)	5.6 (1.8)	5.6 (1.9)^a	5.5 (1.7)	5.7 (1.9)^a	5.5 (1.8)	5.9 (1.9)^a	5.4 (1.9)	5.6 (1.8)^a
parathyroid hormone (pg/ml)	177 (275)	187 (282)	172 (272)	184 (269)^b	178 (271)	175 (297)^a	190 (269)	178 (280)
creatinine (mg/dl)	9.2 (3.2)	8.0 (3.1)^a	9.2 (3.0)	9.2 (3.5)^a	8.9 (3.1)	10.1 (3.2)^a	7.3 (3.0)	9.2 (3.2)^a
ferritin (ng/ml)	285 (431)	247 (403)^c	314 (456)	203 (332)^a	286 (429)	222 (439)^b	278 (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. K_D, dialysate potassium.

P<0.001 for “yes” versus “no” column.

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

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