Table 1.
Number of items, word count, Flesch-Kincaid Grade and reading age for related measures
| Measure | Number of items | Word count | Flesch-Kincaid Grade | Reading age (years) |
| Personal Wellbeing Score | 4 | 42 | 3.7 | 9 |
| ONS4 (standard version) | 4 | 114 | 6.5 | 12 |
| ONS4 (concise version) | 4 | 62 | 6.5 | 12 |
| OECD core questions | 5 | 177 | 6.4 | 11 |
| General Health Questionnaire | 12 | 324 | 6.3 | 11 |
| Short Warwick-Edinburgh Mental Wellbeing Score | 7 | 89 | 3.8 | 9 |
| ICECAP-A | 5 | 264 | 5.1 | 10 |
| Adult Social Care Outcome Tool | 8 | 415 | 5.3 | 10 |
| EQ-5D-3L (including VAS) | 6 | 263 | 5.9 | 11 |
VAS, visual analogue scale.