Table 1.

Baseline characteristics of Elective Outpatient Start cohort

VariableAll Elective Outpatient StartsPDHDStandardized Difference
Total number of patients657320354538
Mean age (SD; range)62.6 (15.3; 18 to 95)61.5 (15.2; 18 to 92)63.1 (15.3; 18 to 95)0.10
Median age6564660.10
Acute kidney injury to start dialysis (%)28 (0.4)0 (0)28 (0.6)0.09
Predialysis care of >12 months (%)5621 (85.5)1736 (85.3)3885 (85.6)0.01
Mean length of predialysis care, days (SD; range)1732.5 (1306.4; 121 to 5364)1751.5 (1322.5; 121 to 5297)1724.1 (1299.2; 121 to 5364)0.02
Median length of predialysis care, days142114551400.50.02
Mean number of predialysis visits in 2 years prior to start (SD; range)9.3 (5.3; 0 to 48)9.5 (4.8; 0 to 29)9.5 (5.5; 0 to 48)0.01
Median number of predialysis visits9.0990.01
Hospitalized in past year (%)3176 (48.3)1067 (52.4)2109 (46.5)0.12
Mean number of hospitalizations (SD; range)0.84 (1.2; 0 to 11)0.84 (1.1; 0 to 8)0.83 (0 to 11)0.01
Median number of hospitalizations0100.01
Mean number of hospital days (SD; range)6.7 (13.9; 0 to 291)6.1 (13.1; 0 to 291)6.9 (14.2; 0 to 199)0.06
Median number of hospital days0200.06
Congestive heart failure (%)1805 (27.5)483 (23.7)1322 (29.1)0.12
Ischemic heart disease (%)2510 (38.2)733 (36.0)1777 (39.2)0.06
Valvular disorder (%)220 (3.4)81 (4.0)139 (3.1)0.05
Rhythm disturbance (%)1106 (16.8)316 (15.5)790 (17.4)0.05
Cardiomyopathy (%)115 (1.8)31 (1.5)84 (1.9)0.02
Hypertension
    no complications (%)4873 (74.1)1532 (75.3)3341 (73.6)0.04
    complications (%)2156 (32.8)732 (36.0)1424 (31.4)0.10
Cerebrovascular disease (%)729 (11.1)192 (9.4)537 (11.8)0.08
Chronic ulcer (%)222 (3.4)54 (2.7)168 (3.7)0.06
Chronic obstructive Pulmonary disease (%)699 (10.6)166 (8.2)533 (11.8)0.12
Disorder of lipoid metabolism (%)981 (14.9)318 (15.6)663 (14.6)0.03
High-risk malignancy (%)296 (4.5)98 (4.8)198 (4.4)0.02
Low-risk malignancy (%)336 (5.9)111 (5.5)275 (6.1)0.03
Depression (%)76 (1.2)14 (0.7)62 (1.4)0.06
Nutritional deficiency (%)95 (1.5)18 (0.9)77 (1.7)0.07
Osteoporosis (%)309 (4.7)89 (4.4)220 (4.9)0.02
Autoimmune disorder (%)702 (10.7)168 (8.3)534 (11.8)0.11
Gastroesophageal reflux disease (%)269 (4.1)61 (3.0)208 (4.6)0.08
Chronic liver disease (%)119 (1.8)30 (1.5)89 (2.0)0.04
Diabetes mellitus, Ontario Diabetes Database (%)3255 (49.5)981 (48.2)2274 (50.1)0.04
  • PD, peritocal dialysis; HD, hemodialysis.