Individual fit of the 10-item MEMSI to the Rasch unidimensional model
| Item | Residual item fit (±2.5) | χ2 p Value (0.05) | Logit: item severity (location) |
|---|---|---|---|
| Item 8 | −1.47 | 0.08 | 1.12 |
| Item 4 | −0.95 | 0.07 | 0.83 |
| Item 10 | 0.37 | 0.59 | 0.52 |
| Item 13 | −0.50 | 0.70 | 0.43 |
| Item 9 | 0.87 | 0.62 | 0.07 |
| Item 14 | 1.14 | 0.13 | −0.25 |
| Item 16 | 1.02 | 0.55 | −0.31 |
| Item 6 | 1.46 | 0.96 | −0.57 |
| Item 12 | 0.86 | 0.68 | −0.88 |
| Item 2 | −0.59 | 0.10 | −0.95 |
MEMSI, Manchester Early Morning Symptoms Index.