Table 2.
Variables obtained before and after the 6-minute walk test in COPD patients with and without asymptomatic PAD
| PAD (+) (n=17) | PAD (−) (n=183) | P-value | |
|---|---|---|---|
| Baseline data obtained before the 6MWT | |||
| Oxygen-cost diagram | 4.8±1.5 | 5.1±1.8 | 0.504 |
| MRC dyspnea scale | 2.7±0.8 | 2.5±0.8 | 0.246 |
| Baseline Borg | 0.73±1.3 | 0.65±1.1 | 0.751 |
| Baseline HR | 87±17 | 83±15 | 0.242 |
| Systolic BP | 140±13 | 138±17 | 0.658 |
| Diastolic BP | 82±8 | 84±12 | 0.447 |
| Baseline SpO2 | 95±2 | 95±2 | 0.493 |
| Data obtained at the end of the 6MWT | |||
| HR | 113±24 | 114±18 | 0.868 |
| Borg scale | 4.71±1.6 | 4.58±1.6 | 0.750 |
| Minimum SpO2 | 90±3 | 90±5 | 0.974 |
| End SpO2 | 92±3 | 92±5 | 0.919 |
| 6MWT, m | 408±74 | 439±86 | 0.159 |
| 6MWT (% pred) | 93.2±17 | 97.5±18 | 0.354 |
Abbreviations: COPD, chronic obstructive pulmonary disease; PAD, peripheral arterial disease; MRC, Medical Research Council; HR, heart rate; BP, blood pressure; SpO2, pulse oximetry oxygen saturation; 6MWT, 6-minute walk test; pred, predicted.