Table 1.
Distribution of DPM facilities by facility characteristics, showing intentional oversampling in some strata
| (A) Facility Characteristics Used for Stratified Sampling of DPM Facilities | |||
|---|---|---|---|
|
| |||
| Facility Characteristic | Categories | N (%) of CMS facilities | N (%) of facilities in US DOPPSa |
| Dialysis organization size | LDO | 2704 (62.3) | 68 (49.6) |
| MDO | 633 (14.6) | 22 (16.1) | |
| SDO | 1006 (23.2) | 47 (34.3) | |
|
| |||
| Rurality | Non-rural | 3923 (90.3) | 82 (59.9) |
| Rural (Local) | 180 (4.1) | 26 (19.0) | |
| Rural (Remote) | 240 (5.5) | 29 (21.2) | |
|
| |||
| Hospital-based | Hospital-based | 235 (5.4) | 19 (13.9) |
| Free-standing | 4108 (94.6) | 118 (86.1) | |
|
| |||
| (B) Facility Characteristics NOT Used for Sampling of DPM Facilities | |||
|
| |||
| Profit status | For-profit | 3574 (83.0) | 91 (67.4) |
| Non-profit | 732 (17.0) | 44 (32.6) | |
|
| |||
| Geographic region | Central | 1010 (23.3) | 43 (31.4) |
| East | 951 (21.9) | 39 (28.5) | |
| South | 1205 (27.8) | 27 (19.7) | |
| West | 1177 (27.1) | 28 (20.4) | |
|
| |||
| Total | N=4343 | N=137 | |
LDO=large dialysis organization (>500 units); MDO=medium dialysis organization (11–500 units); SDO=small or independent dialysis organization (≤10 units). Rurality as defined in text.
a
As of September 2010
With the exception of hospital based facilities (19 recruited to date), the minimum study target of 20 facilities per selection stratum has been achieved in all sampling strata.