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Respondent burden and readability
| Instrument | Number of items | Word count | Time for completion (min) | Flesch–kincaide grade level |
|---|---|---|---|---|
| AQoL-8D | 35 | 1,188 | 5 | 5.3 |
| EQ-5D | 6 | 239 | “few minutes” | 10.6 |
| SF-36® | 36 | 692 | 10 | 5.9 |
| HUI3® | 15 | 1,173 | 8–10 | 7.4 |
| NHP | 38 | 353 | 5–15 | 2 |
| QWB-SA | 80 | 1,934 | 15 | 5.6 |
| WHOQoL-BREF | 26 | 607 | 5 | 6.7 |
| PROMIS/GHS | 10 | 217 | 2 | 7.6 |
