Table 2.
Test–retest Reliability and Agreement Findings by Lunge Test Scoring Strategy (n=37)
| Group; mean (SD), mm* |
||||
|---|---|---|---|---|
| Affected only (LTAff) |
Unaffected − affected (LTDiff) |
|||
| Findings | 1st test | Mean of 3 tests | 1st test | Mean of 3 tests |
| LT values | ||||
| Test occasion | ||||
| Time 2 (test) | 85.6 (37.3) | 89.4 (37.3) | 39.9 (21.6) | 39.2 (21.3) |
| Time 3 (retest) | 87.4 (36.6) | 91.3 (36.9) | 38.1 (21.5) | 37.3 (21.5) |
| Time 3–Time 2 | 1.8 (6.5) | 1.9 (5.5) | −1.8 (8.0) | −2.0 (7.1) |
| Reliability | ||||
| Parameter | ||||
| ICC (95% CI) | 0.98 (0.98–0.99) | 0.99 (0.98–0.99) | 0.93 (0.87–0.96) | 0.94 (0.89–0.97) |
| SEM (95% CI) | 4.7 (3.8–6.1) | 4.0 (3.3–5.2) | 5.7 (4.7–7.4) | 5.1 (4.2–6.6) |
| MDC90 | 10.9 | 9.4 | 13.3 | 11.9 |
| Agreement | ||||
| Parameter | ||||
| 95% limits of agreement | −14.5, 10.9 | −12.6, 8.8 | −13.9, 17.4 | −11.9, 15.8 |
| % ≤5 mm† | 65 | 68 | 41 | 65 |
| % ≤10 mm‡ | 92 | 86 | 81 | 84 |
*
Unless otherwise indicated.
†
Percentage of patients with LT values differing ≤5 mm between test occasions.
‡
Percentage of patients with LT values differing ≤10 mm between test occasions.
LT=Lunge Test; MDC90=minimal detectable change at the 90% CI.