Table 2.
Cross-validated partial least square discriminant analysis prediction of quartiles of n6MWD (upper) and classes of BODE (bottom)
| Prediction n6MWD | Reference n6MWD
|
|||
|---|---|---|---|---|
| 22–111 m/m2 | 112–145 m/m2 | 146–165 m/m2 | 166–215 m/m2 | |
| 22–111 | 15 | 0 | 1 | 1 |
| 112–145 | 0 | 13 | 1 | 3 |
| 146–165 | 0 | 2 | 12 | 1 |
| >165 | 1 | 1 | 2 | 10 |
| Accuracy: 0.79 (95% CI 0.67–0.88, P < 0.001). Cohen’s kappa: 0.72 (95% CI 0.59–0.85, P < 0.001) | ||||
| Prediction BODE classes | Reference BODE classes
|
|
|---|---|---|
| Good prognosis (BODE < 3) | Poor prognosis (BODE ≥ 3) | |
| Good prognosis | 39 | 6 |
| Poor prognosis | 3 | 15 |
| Accuracy: 0.86 (95% CI 0.75–0.93, P < 0.001). Sensitivity: 0.71; specificity: 0.93. Cohen’s kappa: 0.67 (95% CI 0.47–0.87, P < 0.001) | ||
Abbreviations: n6MWD, 6-minute walking test distance normalized by squared height; BODE, body mass index, obstruction, dyspnea, and exercise.