Table 1.
Summary and comparison of baseline demographics, ESRD cause, comorbidities, laboratory parameters, dialysis history, and access type between in-center and satellite-based study participants
| Parameter | Total(n = 202) | In-center(n = 101) | Satellites(n = 101) | P (In-centre versus Satellite) |
|---|---|---|---|---|
| Age (yr; mean ± SD) | 67.3 ± 13.9 | 68.4 ± 12.9 | 66.2 ± 14.9 | 0.276a |
| Male gender (%) | 51.0 | 44.6 | 57.4 | 0.067b |
| Cause of ESRD (%) | 0.177c | |||
| diabetes | 40.6 | 38.7 | 42.1 | |
| renal vascular disease | 20.0 | 17.3 | 22.1 | |
| glomerulonephritis | 6.5 | 8.0 | 5.3 | |
| polycystic kidney disease | 4.7 | 9.3 | 1.1 | |
| other | 28.2 | 26.7 | 29.5 | |
| uncertain/missing | 32.0 | 26.0 | 6.0 | |
| Comorbidities present (%) | ||||
| coronary artery disease | 45.0 | 47.4 | 42.6 | 0.493b |
| cerebrovascular disease | 28.8 | 32.0 | 25.7 | 0.334b |
| diabetes | 35.9 | 34.0 | 37.6 | 0.597b |
| respiratory | 22.7 | 22.7 | 22.8 | 0.988b |
| gastrointestinal | 21.2 | 23.7 | 18.8 | 0.399b |
| musculoskeletal | 16.7 | 18.6 | 14.9 | 0.484b |
| visual impairment | 30.3 | 32.0 | 28.7 | 0.619b |
| behavioral/psychosocial | 5.1 | 6.2 | 4.0 | 0.475b |
| cancer | 14.9 | 14.7 | 14.9 | 0.982b |
| Nutrition indicators (mean± SD) | ||||
| albumin (g/L) | 34.9 ± 4.5 | 34.7 ± 4.8 | 35.1 ± 4.2 | 0.561a |
| Normalized protein nitrogen appearance (g/kg per d) | 1.07 ± 0.26 | 1.09 ± 0.28 | 1.05 ± 0.25 | 0.348a |
| Anemia management (mean± SD) | ||||
| Hb (g/L) | 113.0 ± 15.6 | 112.9 ± 17.3 | 113.1 ± 13.9 | 0.988d |
| ferritin (μg/L) | 391.1 ± 344.2 | 352.9 ± 353.0 | 427.8 ± 333.0 | 0.126a |
| transferrin saturation (%) | 23.1 ± 15.6 | 24.9 ± 12.7 | 21.2 ± 18.2 | 0.035d |
| Dialysis adequacy (mean± SD) | ||||
| Kt/V | 1.77 ± 0.44 | 1.87 ± 0.52 | 1.68 ± 0.34 | 0.018d |
| Percent reduction in blood urea concentration | 72.9 ± 9.4 | 73.9 ± 6.8 | 72.1 ± 11.2 | 0.360d |
| Dialysis history | ||||
| Time on dialysis (mo; mean± SD) | 29.8 ± 34.8 | 26.5 ± 34.5 | 33.0 ± 34.9 | 0.193a |
| Time at unit (mo; mean± SD) | 21.3 ± 28.0 | 22.9 ± 30.1 | 19.8 ± 26.0 | 0.438a |
| Time on dialysis (min; mean± SD) | 229.1 ± 31.1 | 225.1 ± 34.5 | 233.0 ± 27.0 | 0.379d |
| Access type (%)e | 0.028b | |||
| fistula | 44.0 | 35.4 | 52.5 | |
| graft | 15.0 | 13.1 | 16.8 | |
| permanent catheter | 39.5 | 49.5 | 29.7 | |
| temporary line | 1.5 | 2.0 | 33.3 |
a
Unpaired t test.
b
χ2 test for comparing proportions.
c
Fisher exact two-tailed test.
d
Wilcoxon two-sample test (performed when variances were not equal).
e
Counts do not add up to 202 because of missing data.