Table 1.
Survey scoring domains and ‘primary study outcomes
| Domain | Number of questions | Response options | Primary study outcome (‘Top Box’ outcome) |
|---|---|---|---|
| Nephrologists’ Communication and Caring (NCC) | 6 | Never/sometimes/usually/always (5) Yes/no (1) |
Average equal to 4 |
| Quality of Dialysis Center Care and Operations (DCO) | 17 | Never/sometimes/usually/always (14) Yes/no (3) |
Average equal to 4 |
| Providing Information to Patients (PIP) | 9 | Yes/no (9) | Average equal to 1 |
| Nephrologist rating | 1 | 0–10 (0 worst and 10 best) | 9–10 |
| Dialysis staff rating | 1 | 0–10 (0 worst and 10 best) | 9–10 |
| Dialysis facility rating | 1 | 0–10 (0 worst and 10 best) | 9–10 |