Bland–Altman summary statistics of mean bias and TRV expressed as 95% limits of agreement
| Mean difference (SE) | 95% CI mean difference | Range of observed difference | TRV 95% limits of agreement | |
|---|---|---|---|---|
| Normal subjects (n=38) | ||||
| C1–C2 | −0.011 (0.008) | −0.027 to 0.005 | −0.12, 0.12 | ±0.093 |
| MAC1–MAC2 | −0.009 (0.008) | −0.026 to 0.008 | −0.12, 0.08 | ±0.103 |
| AMD subjects (n=80) | ||||
| C1–C2 | −0.019 (0.007) | −0.033 to −0.005 | −0.20, 0.12 | ±0.123 |
| MAC1–MAC2 | 0.009 (0.005) | −0.001 to 0.019 | −0.08, 0.14 | ±0.090 |
AMD, age-related macular degeneration; MAC, Moorfields Acuity Chart; TRV, test–retest variability.