Table 3.
Sources of variance in heparin dose for maintenance hemodialysis in older U.S. patients.
| Model |
Patient level R-squared: % variance at patient level explained by the model (95% confidence interval) |
Facility level R-squared: % variance at facility level explained by the model (95% confidence interval) |
|---|---|---|
| Adjusted for patient characteristics only1 | 23% (22%–25%) | 21% (18%–24%) |
| Adjusted for patient + facility characteristics2 | 25% (24%–27%) | 27% (24%–31%) |
1
Patient characteristics included age, sex, race, ethnicity, comorbidities, weight, blood pressure, hemoglobin, platelet count, albumin, vascular access, length of session, reuse status of the dialyzer, and years on dialysis.
2
Facility characteristics included number of outpatient hemodialysis patients, by quartile, urban/rural status, and census division.