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Selected self-report instruments from the Health Survey for England (2004 cohort, N = 4000)
| Scale | Number of Items (k) | Number of response options (m) | Number completing (n) | Alpha | Delta |
| Self-reported health | 1 | 5 | 3997 | - | 0.84 |
| GHQ-12 | 12 | 2 | 3705 | 0.88 | 0.63 |
| Perceived Social Support | 7 | 3 | 3730 | 0.88 | 0.64 |
| EuroQol | 5 | 3 | 3679 | 0.77 | 0.71 |
