Table 3.
Results of subgroup analysis showing subhazard ratio (95% CI) for access to transplantation by DFTC distance category
| Access to transplant | Dialysis facility to transplant center distance (miles) | ||
|---|---|---|---|
| <10 miles (reference) | 10 to <50 miles | ≥50 miles | |
| Regiona | |||
| West | 1 | 0.81 (0.78-0.84) | 0.82 (0.78-0.86) |
| Midwest | 1 | 0.96 (0.92-0.99) | 1.00 (0.96-1.05) |
| South | 1 | 0.96 (0.93-0.99) | 0.89 (0.86-0.92) |
| Northeast | 1 | 0.98 (0.94-1.02) | 0.97 (0.92-1.03) |
| Rural/urban categorya | |||
| Metropolitan | 1 | 0.93 (0.91-0.95) | 0.90 (0.88-0.92) |
| Micropolitan | 1 | 0.69 (0.62-0.77) | 0.74 (0.67-0.81) |
| Rural | 1 | 1.04 (0.92-1.17) | 0.97 (0.88-1.08) |
Fine and Gray models with competing risk of death.
Model 2: adjusted for patient factors (age, sex, race/ethnicity, dialysis treatment modality [peritoneal or hemodialysis], insurance status, distance from patient residence to transplant center, neighborhood median income by zip code, rural/urban category [metropolitan, micropolitan, rural/ small town], and comorbidities [diabetes, congestive heart failure, coronary artery disease, cerebrovascular disease, peripheral artery disease, drug or alcohol dependence, smoking status, and inability to mobilize or transfer]) and dialysis facility factors (profit status [nonprofit or for-profit], size of dialysis facility [number of patients receiving ESKD care at the facility in the year of the patient’s dialysis initiation], and UNOS region in which the facility is located).
aP < 0.05 for interaction with DFTC distance.
CI, confidence interval; DFTC, dialysis facility to transplant center; ESKD, end-stage kidney disease; UNOS, United Network for Organ Sharing.