Table 2.
Performance of 1/2ABC and 2/3SH in different subsets.
| Entire set | Subset 1 | Subset 2 | |||||
|---|---|---|---|---|---|---|---|
| 1/2ABC | 2/3SH | 1/2ABC | 2/3SH | 1/2ABC | 2/3SH | ||
| Percentage volume difference (%) | P25 | −5.801 | −7.079 | −5.912 | −5.849 | −6.235 | −8.046 |
| Median | 3.865 | 0.820 | 4.150 | 2.807 | 1.993 | 0.858 | |
| P75 | 15.382 | 8.448 | 19.032 | 10.886 | 15.733 | 9.630 | |
| Absolute percentage volume difference (%) | P25 | 4.752 | 3.624 | 5.146 | 4.395 | 4.133 | 4.119 |
| Median | 9.284 | 7.790 | 12.863 | 8.477 | 10.218 | 8.629 | |
| P75 | 17.494 | 12.833 | 20.819 | 14.882 | 19.383 | 13.782 | |
| Spearman rank correlation | r s | 0.987 | 0.994 | 0.925 | 0.969 | 0.945 | 0.972 |
| 95% CI of rs | 0.985–0.989 | 0.993–0.995 | 0.897–0.945 | 0.957–0.978 | 0.931–0.956 | 0.964–0.978 | |
| Intraclass correlation | ICC | 0.976 | 0.990 | 0.891 | 0.952 | 0.932 | 0.966 |
| 95% CI of ICC | 0.972–0.980 | 0.989–0.992 | 0.852–0.921 | 0.933–0.965 | 0.915–0.946 | 0.957–0.973 | |
| Parameters of Bland-Altman plot | Mean (mL) | 2.249 | 0.629 | 0.388 | 0.213 | 0.377 | −0.006 |
| Lower LoA (mL) | −13.153 | −8.981 | −2.344 | −1.532 | −3.561 | −2.683 | |
| Upper LoA (mL) | 17.651 | 10.239 | 3.113 | 1.952 | 4.324 | 2.669 | |
| Number out of LoA | 33 | 34 | 5 | 3 | 11 | 17 | |
| Percent out of LoA (%) | 4.867 | 5.015 | 3.448 | 2.069 | 3.929 | 6.071 | |
| Diagnostic accuracy∗ (%) | <10 | 52.802 | 63.422 | 43.448 | 58.621 | 49.643 | 58.929 |
| <20 | 79.646 | 93.658 | 72.414 | 88.966 | 76.429 | 90.357 | |
| <30 | 93.510 | 97.788 | 88.276 | 94.483 | 91.429 | 96.429 | |
rs, Spearman rank-correlation coefficient; CI, confidence interval; ICC, intraclass correlation coefficient; LoA, limit of agreement. ∗Criteria were based on the values of absolute percentage volume difference (APVD).