Table 1.
Summary of statistical comparisons: older vs younger group and test–retest repeatability
| Parameter | Older group mean (±SD) | Younger group mean (±SD) | P valuea | Test–retest correlation coefficient, (p value) | Test–retest CoR | Test–retest CoV |
|---|---|---|---|---|---|---|
| RCB (mins) | 7.20 (2.45) | 7.04 (1.53) | 0.82 | 0.67 (<0.0001) | 3.62 | 28 % |
| S2 (log cd.m−2.min−1) | 0.19 (0.03) | 0.23 (0.03) | <0.0003 | 0.49 (<0.009) | 0.07 | 15 % |
| S3 (log cd.m−2.min−1) | 0.04 (0.02) | 0.05 (0.02) | 0.05 | 0.34 (0.05) | 0.05 | 40 % |
| T30 (log cd.m−2) | −4.34 (0.25) | −4.40 (0.44) | 0.63 | 0.84 (<0.0001) | 0.35 | 10 % |
aIndependent t test older vs. younger group