Table 1.
Patient Characteristics, Stratified by Dialysis Modality
| Characteristics | All (N= 271,722) |
PD (n = 17,487) |
HD (n = 254,235) |
P-value |
|---|---|---|---|---|
| Baseline | ||||
| Age at first ESRD service | 75.0 [71.0, 80.0] | 74.0 [70.0, 78.0] | 76.0 [71.0, 81.0] | <.001 |
| Female sex | 51.0 | 46.1 | 51.4 | <.001 |
| Race | <.001 | |||
| White | 72.8 | 84.4 | 72.0 | |
| Black | 23.1 | 11.7 | 23.9 | |
| Asian | 2.8 | 2.9 | 2.8 | |
| other | 1.3 | 1.1 | 1.3 | |
| Hispanic ethnicity | 8.1 | 5.9 | 8.3 | <0.001 |
| Diagnosed/reported comorbid conditions |
||||
| Hypertension | 98.2 | 98.5 | 98.1 | <0.001 |
| Heart failure | 64.0 | 48.7 | 65.1 | <0.001 |
| Coronary arterial disease | 47.6 | 42.1 | 48.0 | <0.001 |
| Cerebrovascular disease | 29.8 | 23.0 | 30.3 | <0.001 |
| Peripheral vascular disease | 40.0 | 31.7 | 40.5 | <0.001 |
| Diabetes | 63.0 | 56.8 | 63.5 | <0.001 |
| Chronic obstructive lung disease | 10.4 | 7.1 | 10.7 | <0.001 |
| Cancer | 22.5 | 18.8 | 22.7 | <0.001 |
| Current smoking | 3.6 | 3.9 | 3.6 | <0.001 |
| Alcohol dependence | 0.6 | 0.3 | 0.6 | <0.001 |
| Drug dependence | 0.1 | 0.0 | 0.1 | <0.001 |
| Inability to ambulate or transfer | 6.5 | 2.2 | 6.8 | <0.001 |
| Cause of end-stage renal disease | <0.001 | |||
| Diabetes | 41.6 | 39.1 | 41.8 | |
| Hypertension | 34.4 | 33.5 | 34.4 | |
| Glomerulonephritis | 6.0 | 9.9 | 5.7 | |
| Other | 17.9 | 17.3 | 18.0 | |
| Missing | 0.1 | 0.1 | 0.1 | |
| Count of nephrology visits before index |
3.0 (0.0, 9.0) | 7.0 (2.0, 13.0) | 3.0 (0.0, 9.0) | <0.001 |
| Body mass index, kg/m2 | 25.4 (22.1, 29.7) | 25.7 (22.8, 29.4) | 25.4 (22.1, 29.7) | <0.001 |
| Serum albumin, g/dl | 3.2 (2.8, 3.6) | 3.6 (3.2, 4.0) | 3.2 (2.7, 3.6) | <0.001 |
| Hemoglobin, g/dl | 10.0 (8.9, 11.0) | 10.6 (9.6, 11.6) | 9.9 (8.9, 11.0) | <0.001 |
| eGFR, ml/min/1.73m2 | 7.7 (5.6, 10.5) | 8.1 (6.0, 10.9) | 7.7 (5.6, 10.5) | <0.001 |
| Follow-up during up to 3 years | <0.001 | |||
| Incident AF | 69,705 (25.7) | 3876 (22.2) | 65,829 (25.9) | <0.001 |
| Death before incident AF | 97,704 (36.0) | 5009 (28.6) | 92,695 (36.5) | <0.001 |
| Follow-up duration, y | 1.3 (0.4, 3.0) | 1.2 (0.6, 2.4) | 1.3 (0.4, 3.0) | <0.001 |
| During first 90 days | <0.001 | |||
| Incident AF | 21,709 (8.0) | 769 (4.4) | 20,940 (8.2) | <0.001 |
| Death before incident AF | 22,241 (8.2) | 622 (3.6) | 21,619 (8.5) | <0.001 |
| From 91 days to 3 years | ||||
| Incident AF | 47,996 (21.4) | 3107 (19.4) | 44,889 (21.6) | 0.7 |
| Death before incident AF | 75,463 (33.7) | 4387 (27.4) | 71,076 (34.1) | <0.001 |
Values for continuous variables given as median [interquartile range]; categorical variables as percentage or count (percentage).
AF – atrial fibrillation; eGFR – estimated glomerular filtration rate (calculated using the _____ equation); ESRD – end-stage renal disease; HD – hemodialysis; PD – peritoneal dialysis.
Missing data included 30 (0.01%) for sex, 38 (0.01%) for race, 10,892 (4.0%) for body mass index, 68,247 (25.1%) for serum albumin, 21,781 (8.0%) for hemoglobin, and 3,878 (1.4%) for estimated glomerular filtration rate.