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Table 1 Baseline demographics, utilization, and outcomes for low primary care, mixed care and high primary care groups

From: Care of the dialysis patient: Primary provider involvement and resource utilization patterns - a cohort study

Demographics and comorbidities Overall (N = 2985) Groupa
   Low Primary Care <25th percentile (N = 737) Mixed Care 25th–75th percentile (N = 1501) High Primary Care >75th percentile (N = 747)
Age at ESRD onset, Median (IQR) 66.0 (53.0, 75.0) 60.0 (48.0, 70.0) 68.0 (57.0, 76.0) 64.0 (52.0, 74.0)
Age group, n (%)
 18- < 45 412 (13.8) 141 (19.1) 165 (11.0) 106 (14.2)
 45- < 65 987 (33.1) 307 (41.7) 406 (27.1) 274 (36.7)
 65- < 75 830 (27.8) 170 (23.1) 473 (31.5) 187 (25.0)
 75+ 756 (25.3) 119 (16.2) 457 (30.5) 180 (24.1)
Males, n (%) 1777 (59.5) 477 (64.7) 877 (58.4) 423 (56.6)
Race, n (%)
 White 2689 (90.1) 667 (90.5) 1360 (90.6) 662 (88.6)
 Black 163 (5.5) 39 (5.3) 76 (5.1) 48 (6.4)
 Other 133 (4.5) 31 (4.2) 65 (4.3) 37 (5.0)
Charlson score, median (IQR) 7.0 (5.0, 9.0) 6.0 (4.0, 8.0) 7.0 (5.0, 9.0) 7.0 (5.0, 9.0)
Charlson score 8 or more, n (%) 1210 (40.5) 221 (30.0) 684 (45.6) 305 (40.8)
Primary cause of ESRD, n (%)
 Diabetes 1073 (36.0) 231 (31.3) 552 (36.8) 290 (38.8)
 Hypertension 621 (20.8) 148 (20.1) 323 (21.5) 150 (20.1)
 Glomerulonephritis 451 (15.1) 127 (17.2) 214 (14.3) 110 (14.7)
 Infiltrative diseases 180 (6.0) 41 (5.6) 92 (6.1) 47 (6.3)
 Cystic kidney 87 (2.9) 35 (4.8) 35 (3.8) 17 (2.3)
Health care utilization
 Total Follow-up (person years) 8440.7 1806.2 4394.1 2240.4
 Primary Care Visits (ppy) 4.5 .6 4.9 6.9
 Other Specialty Visits (ppy) 9.1 8.0 10.0 8.1
 Mid-level/Nephrology Visits (ppy) 2.8 4.0 3.4 0.6
 Hospital Admissions (ppy) 2.2 1.8 2.3 2.2
 ED visits (ppy) 1.5 1.2 1.6 1.6
Outcomes
 Transplant, n (% at 4 years) 605 (20.3%) 232 (31.5%) 251 (16.7%) 122 (16.3%)
 Died, n (% at 4 years) 1444 (48.4%) 272 (36.9%) 775 (51.6%) 397 (51.3%)
 Median Survival years (IQR) 4.1 (2.6, 6.7) 4.3 (2.3, 7.0) 4.1 (2.0, 6.4) 3.9 (2.0, 7.0)
  1. ESRD end-stage renal disease, ppy per person-year
  2. aGroups based on proportion of primary care Evaluation and Management (EM) visits out of total EM visits to primary care, mid-level/nephrology providers
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