Table 2.

Baseline characteristics according to cohort definition

VariableAll Outpatient Dialysis90-Day CohortAll Elective Outpatient Starts
Total number of patients16,91512,3696573
Started as outpatient (%)9178 (54.3)6613 (53.5)6573 (100)
First treatment modality (%)
PD3292 (19.5)2499 (20.2)2035 (31.0)
HD13,216 (78.1)9570 (77.4)4538 (69.0)
CRRT407 (2.4)293 (2.4)0 (0)
Mean age (SD; range)63.6 (15.7; 18 to 96)63.5 (15.5; 18 to 98)62.6 (15.3; 18 to 95)
Median age676665
AKT to start (%)5274 (31.2)3727 (30.1)28 (0.4)
History of CKD (%)14,877 (88.0)11,610 (93.9)6573 (100)
Predialysis care (%)13,489 (79.8)10,513 (85.0)6573 (100)
Predialysis care of >4 months (%)11,261 (66.6)8892 (71.9)6573 (100)
Predialysis care of >12 months (%)9520 (56.3)7496 (60.6)5621 (85.5)
Mean length of predialysis care, days (SD; range)1109.0 (1300; 0 to 5364)1180.4 (1292.8; 0 to 5288)1732.5 (1306.4; 121 to 5364)
Median length of predialysis care, days5596861421
Mean number of predialysis visits in 2 years prior to start (SD; range)6.0 (5.8; 0 to 48)6.7 (5.9; 0 to 48)9.5 (5.3; 0 to 48)
Median number of predialysis visits5.06.09.0
Hospitalized in past year (%)8688 (51.4)6577 (53.2)3176 (48.3)
Mean number of hospitalizations (range)0.96 (1.34; 0 to 18)0.98 (1.3; 0 to 15)0.84 (1.2; 0 to 11)
Median number of hospitalizations1.01.00.0
Mean number of hospital days (range)11.8 (19.4; 0 to 327)11.8 (19.3; 0 to 291)6.7 (13.9; 0 to 291)
Median number of hospital days5.05.00.0
Congestive heart failure (%)5957 (35.2)4449 (36.0)1805 (27.5)
Ischemic heart disease (%)7012 (41.5)5205 (42.1)2510 (38.2)
Valvular disorder (%)885 (5.2)610 (4.9)220 (3.4)
Rhythm disturbance (%)3739 (22.1)2683 (21.7)1106 (16.8)
Cardiomyopathy (%)503 (3.0)355 (2.9)115 (1.8)
Hypertension
    no complications (%)11,818 (69.9)8979 (72.6)4873 (74.1)
    complications (%)5845 (34.6)4648 (37.6)2156 (32.8)
Cerebrovascular disease (%)2241 (13.3)1666 (13.5)729 (11.1)
Chronic ulcer (%)952 (5.6)693 (5.6)222 (3.4)
Chronic obstructive pulmonary disease (%)2338 (13.8)1690 (13.7)699 (10.6)
Disorder of lipoid metabolism (%)2706 (16.0)2027 (16.4)981 (14.9)
High-risk malignancy (%)1036 (6.1)679 (5.5)296 (4.5)
Low-risk malignancy (%)1273 (7.5)883 (7.1)386 (5.9)
Depression (%)344 (2.0)244 (2.0)76 (1.2)
Nutritional deficiency (%)428 (2.5)314 (2.5)95 (1.5)
Osteoporosis (%)815 (4.8)564 (4.6)309 (4.7)
Autoimmune disorder (%)2059 (12.2)1502 (12.1)702 (10.7)
Gastroesophageal reflux disease (%)764 (4.5)564 (4.6)269 (4.1)
Chronic liver disease (%)527 (3.1)363 (2.9)119 (1.8)
Diabetes mellitus, Ontario Diabetes Database (%)8101 (47.9)6219 (50.3)3255 (49.5)
  • CRRT, continuous renal replacement therapy; PD, peritoneal dialysis; HD, hemodialysis.