Table 1.

Baseline demographic characteristics of the overall cohort and comparison between patients who died of dialysis withdrawal and those who died of causes other than dialysis withdrawal

CharacteristicOverall CohortDW DeathsNon-DW DeathsP Valuea
Total patients (n) 24,88428447229
Age at time of RRT (yr)59±1569±1164±13<0.001
Men, n (%)14837 (59.6)1625 (57.1)4265 (59.0)0.09
BMI at entry (kg/m2)27±626±627±6<0.001
Racial origin, n (%)<0.001
 white18,390 (73.9)2399 (84.4)5195 (71.9)
 Asian1646 (6.6)113 (4.0)365 (5.0)
 Aboriginal/Torres Strait Islander1921 (7.7)136 (4.8)643 (8.9)
 Māori1514 (6.1)122 (4.3)657 (9.1)
 Pacific Islander997 (4.0)56 (2.0)290 (4.0)
 other416 (1.7)18 (0.6)79 (1.1)
Primary renal disease, n (%)<0.001
 diabetes mellitus7901 (31.8)881 (31.0)2753 (38.1)
 GN6264 (25.2)491 (17.3)1214 (16.8)
 renal vascular disease/hypertension3487 (14.0)528 (20.5)1244 (17.2)
 polycystic kidney disease1597 (6.4)68 (2.4)225 (3.1)
 unknown204 (0.8)19 (0.7)63 (0.9)
 other5431 (21.8)803 (28.2)1730 (23.9)
Comorbidity at entry, n (%)
 diabetes mellitus10,258 (41.2)1239 (43.6)3591 (49.7)<0.001
 chronic lung disease3926 (15.8)606 (21.3)1562 (21.6)0.74
 coronary artery disease9867 (39.7)1588 (55.8)3912 (54.1)0.12
 peripheral vascular disease6414 (25.8)1087 (38.2)2605 (36.0)0.04
 cerebrovascular disease3738 (15.0)740 (26.0)1483 (20.5)<0.001
Late referral, n (%)6021 (24.2)833 (29.3)2050 (28.4)0.35
Modality of RRT at entry, n (%)0.18
 hemodialysis17,812 (71.8)2120 (74.5)5259 (72.7)
 peritoneal dialysis6385 (25.7)719 (25.3)1954 (27.0)
Pre-emptive transplantation, n (%)687 (2.8)5 (0.2)16 (0.2)
Place of residence at entry, n (%)b<0.001
 major cities13,757 (67.3)1675 (69.8)3641 (63.9)
 inner regional3661 (17.9)474 (19.8)1045 (18.3)
 outer regional2027 (9.9)190 (7.9)684 (12.0)
 remote662 (3.2)47 (2.0)217 (3.8)
 very remote332 (1.6)14 (0.6)114 (2.0)
Size of renal unit, n (%)<0.001
 large16,941 (68.1)1749 (61.5)5022 (69.5)
 medium6606 (26.5)895 (31.5)1877 (26.0)
 small1337 (5.4)200 (7.0)330 (4.6)
  • Values expressed with a plus/minus sign are the mean ±SD. P value is the comparison between patients who died of DW and those who died of causes other than DW. DW, dialysis withdrawal; BMI, body mass index; RRT, renal replacement therapy.

  • a Continuous variables were analyzed with the use of t tests, and all categorical data were analyzed with the use of chi-squared test and one-way ANOVA.

  • b Available only for Australian patients.