Components of variance for preventability assessments, represented as proportions of the total variance for an individual assessment, with 95% CIs
| Study | Scale | Case note | Reviewer | Residual error | Reliability of a single review |
|---|---|---|---|---|---|
| UK study | Likert | 0.27 (0.19 to 0.39) | 0.14 (0.05 to 0.34) | 0.58 (0.44 to 0.71) | 0.27 |
| Raw percentage | 0.27 (0.19 to 0.36) | 0.09 (0.04 to 0.21) | 0.64 (0.54 to 0.73) | 0.27 | |
| US study | Likert | 0.23 (0.10 to 0.36) | 0.17 (0.04 to 0.31) | 0.60 (0.45 to 0.75) | 0.23 |
| Raw percentage | 0.22 (0.11 to 0.33) | 0.07 (0.00 to 0.15) | 0.71 (0.58 to 0.83) | 0.22 |
The Likert variance decomposition refers to latent scales (the true score latent variable).