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Table 2 Baseline characteristics

From: Comparative effectiveness of home dialysis therapies: a matched cohort study

Variable Before matching (overall sample) After matching
Home HD PD Standardized difference (%) Home HD PD Standardized difference (%)
n = 3142 n = 74,922   n = 2668 n = 2668  
Age (years), mean (SD) 50.0 (14.6) 56.3 (15.7) 41.6 51.3 (14.3) 51.4 (14.1) 0.3
 18–29 years, % 9.4 6.2 12.1 7.5 7.5 0
 30–39 years, % 17.2 10.2 20.6 15.7 15.4 0.9
 40–49 years, % 20.2 15.8 11.5 19.8 19.9 0.1
 50–59 years, % 24.8 22.8 4.7 25.7 26.7 2.2
 60–69 years, % 19.2 23.1 9.5 21.1 20.5 1.5
 70–79 years, % 7.8 16.3 26.4 8.7 8.9 0.9
 >80 years, % 1.5 5.8 23.2 1.5 1.2 2.9
Sex (male), % 65.5 55.1 21.5 65.6 65.6 0
Race, %
 White 68.2 69.8 3.4 71.7 71.7 0
 Black 28.1 23.6 10.2 25.9 25.9 0
 Other 3.7 6.6 13.1 2.4 2.4 0
Smoking, % 6.9 6.7 0.7 7.0 7.5 1.9
Alcohol, % 0.5 0.7 1.9 0.6 0.8 3.1
Drugs, % 0.4 0.5 0.8 0.5 0.9 5.5
Private coverage, % 8.5 10.2 5.6 6.2 6.2 0
ESRD start date, %
 ≤1976 0.1 0.1 0 0.1 0 1.3
 1977–1994 0.6 1.0 4.1 0.5 0.6 2.6
 1995–1999 5.8 1.6 21.3 3.2 3.1 0.5
 2000–2004 12.6 5.7 24.3 9.6 10.8 4.2
 2005–2009 74.9 73.5 3.2 80.1 79.5 1.5
 ≥2010 6.1 18.2 37.8 6.6 5.9 3.1
Duration of ESRD, mean (SD) 2.9 (3.0) 1.0 (2.5) 70.2 2.4 (2.4) 2.4 (2.4) 1.6
 0–3 months, % 1.3 66.4 189.5 1.5 1.5 0
 3–6 months, % 11.0 6.4 16.4 12.3 12.3 0
 6–12 months, % 17.5 6.0 36.5 19.0 19.0 0
 12–24 months, % 22.4 6.4 46.7 24.5 24.5 0
 24–48 months, % 23.8 8.8 41.5 26.3 26.3 0
 48–72 months, % 11.3 2.3 36.6 9.3 9.3 0
 72–96 months, % 5.3 1.2 23.0 3.0 3.0 0
 >96 months, % 7.4 2.6 22.4 4.0 4.0 0
Weight (kg), mean (SD) 90.5 (25.8) 82.3 (21.4) 34.4 88.5 (23.1) 88.4 (23.0) 0.1
Prior transplant, %
 0 92.9 97.0 18.9 94.7 94.8 0.1
 1 6.4 2.7 17.9 4.8 4.9 0.1
 2 0.7 0.3 5.7 0.5 0.4 1.3
Comorbidities, %
 Cancer 5.7 5.0 3.0 6.0 4.3 7.8
 Hypertension 83.9 86.4 7.2 84.0 85.6 4.4
 Congestive heart failure 17.4 19.9 6.5 16.2 16.2 0
 Cerebrovascular disease 3.8 5.9 9.7 4.0 4.7 3.5
 Peripheral vascular disease 7.0 9.8 10.1 7.2 9.1 7.1
 Chronic obstructive pulmonary disease 4.3 4.9 3.0 4.3 4.8 2.4
 Diabetes 27.3 31.8 9.7 28.8 28.8 0
Laboratory values, mean (SD)
 Albumin (g/dL) 3.3 (0.7) 3.4 (0.7) 15.6 3.3 (0.7) 3.2 (0.7) 13.9
 Hemoglobin (g/dL) 10.1 (1.7) 10.4 (1.7) 18.2 10.1 (1.7) 10.0 (1.7) 9.8
  1. Note: Except for age and duration of ESRD which are provided as of the index date (start of daily home HD or PD), all baseline variables are given as of the date of first renal replacement therapy (ESRD start date). Patients were matched by age (±5 years), gender, race, weight (±5 kg), duration of ESRD category, propensity score (0.02), ESRD start date (±5 years), congestive heart failure, diabetes, and medical coverage. The propensity score model included sex, race, weight, diabetes, hypertension, congestive heart failure, cerebrovascular disease, peripheral vascular disease, chronic obstructive pulmonary disease, cancer, number of prior transplants, medical coverage, history of smoking, and illicit drug use