| Characteristic | Peritoneal dialysis n = 8 091 | No peritoneal dialysis n = 23 687 | p value* |
|---|---|---|---|
| Age, yr, mean ± SD | 60.3 ± 16.4 | 65.3 ± 15.3 | < 0.001 |
| Sex, % female | 3 431 (42.4) | 9498 (40.1) | < 0.001 |
| Body mass index, mean ± SD | 26.8 ± 5.7 | 27.7 ± 6.8 | < 0.001 |
| Self-reported ethnic origin | < 0.001 | ||
| White | 5 542 (68.5) | 17 268 (72.9) | |
| East Asian | 712 (8.8) | 1 374 (5.8) | |
| Black | 291 (3.6) | 734 (3.1) | |
| South Asian | 364 (4.5) | 900 (3.8) | |
| Aboriginal | 429 (5.3) | 1 327 (5.6) | |
| Other | 396 (4.9) | 1 350 (5.7) | |
| Unknown | 357 (4.4) | 734 (3.1) | |
| Predialysis care > 30 d, % of patients | 7 387 (91.3) | 17 481 (73.8) | < 0.001 |
| Comorbidities, % of patients | |||
| Angina | 1 416 (17.5) | 6 088 (25.7) | < 0.001 |
| Acute coronary syndrome | 1 448 (17.9) | 6 040 (25.5) | < 0.001 |
| Pulmonary edema | 1 384 (17.1) | 7 201 (30.4) | < 0.001 |
| Diabetes mellitus | 3 495 (43.2) | 11 299 (47.7) | < 0.001 |
| Stroke | 930 (11.5) | 3 908 (16.5) | < 0.001 |
| Peripheral vascular disease | 1 246 (15.4) | 5 353 (22.6) | < 0.001 |
| Malignancy | 752 (9.3) | 3 600 (15.2) | < 0.001 |
| Lung disease | 615 (7.6) | 3 340 (14.1) | < 0.001 |
| Hypertension medications | 7 217 (89.2) | 20 181 (85.2) | < 0.001 |
| Current smoker | 955 (11.8) | 3 174 (13.4) | < 0.001 |
| Coronary artery bypass graft | 971 (12.0) | 3 908 (16.5) | < 0.001 |
| Serious illness | 761 (9.4) | 3 743 (15.8) | < 0.001 |
| No. of comorbidities, mean ± SD | 2.6 ± 1.7 | 3.3 ± 2.0 | < 0.001 |
| Cause of end-stage kidney disease, % | < 0.001 | ||
| Hypertension | 1 398 (17.3) | 4 815 (20.3) | |
| Diabetes mellitus | 2 904 (35.9) | 8 533 (36.0) | |
| Glomerulonephritis | 1 578 (19.5) | 3 486 (14.7) | |
| Obstruction | 178 (2.2) | 640 (2.7) | |
| Interstitial | 185 (2.3) | 616 (2.6) | |
| Polycystic kidney disease | 499 (6.2) | 876 (3.7) | |
| Other | 801 (9.9) | 2 561 (10.8) | |
| Unknown | 548 (6.8) | 2 160 (9.1) | |
| Hemoglobin, g/L, mean ± SD | 108.1 ± 16.5 | 100.4 ± 17.4 | < 0.001 |
| Phosphate, mmol/L, mean ± SD | 1.82 ± 0.56 | 1.94 ± 0.69 | < 0.001 |
| Distance to facility, median (IQR) | 15.6 (6.3–66.4) | 10.6 (4.6–44.2) | < 0.001 |
| < 50 km | 5696 (70.4) | 18 192 (76.8) | < 0.001 |
| 50–150 km | 1440 (17.8) | 3 600 (15.2) | |
| > 150 km | 955 (11.8) | 1 895 (8.0) | |
| Geographic region† | < 0.001 | ||
| Atlantic | 752 (9.3) | 2 392 (10.1) | |
| Ontario | 4 313 (53.3) | 12 791 (54.0) | |
| Prairies | 1 278 (15.8) | 4 832 (20.4) | |
| British Columbia | 1 748 (21.6) | 3 672 (15.5) |
Note: IQR = interquartile range, SD = standard deviation. *Statistical testing for all continuous variables was by Student t test, except for median distance to facility, for which the Mann–Whitney U test was used. Categorical variables were examined by the χ2 test. †Atlantic provinces consist of Prince Edward Island, Nova Scotia, New Brunswick, and Newfoundland and Labrador. The Prairie provinces consist of Manitoba, Saskatchewan, and Alberta. For the purposes of data analysis, Ontario was subdivided into four regions, British Columbia was subdivided into three regions, Alberta was subdivided into two regions, and data for Prince Edward Island, New Brunswick, and Newfoundland and Labrador were combined.