Measurement reproducibility for the different subgroups
| Variable | Mean (mm2) | Within subject SD | 95% reference range* | CV (%) | Reliability coefficient (95% CI)† |
|---|---|---|---|---|---|
| *1.96 × within subject SD; 95% of measurements are expected to lie within this departure from the true value. | |||||
| †The proportion of total variance caused by between subject variation. Under assumptions which are plausible here, one minus this value is the proportion of variation caused by measurement error. | |||||
| CV, coefficient of variation. | |||||
| Acute diseased nerve area | 18.4 | 1.13 | ± 2.21 | 6.4 | 0.92 (0.88 to 0.96) |
| Acute healthy nerve area | 17.8 | 1.21 | ± 2.37 | 6.8 | 0.89 (0.84 to 0.94) |
| Six month diseased nerve area | 16.4 | 0.76 | ± 1.49 | 4.6 | 0.96 (0.95 to 0.98) |
| Six month healthy nerve area | 17.4 | 1.11 | ± 2.18 | 6.4 | 0.91 (0.87 to 0.95) |