Source: Annual Congress 2005 - Health status in COPD and asthma: its relevance in pulmonary rehabilitation
Disease area: Airway diseases

Abstract

Aim- To investigate walking strategy during six minutes walk test (6mWT) with and without encouragement in CLD patients.
Methods- 28 patients (12F) with severe obstructive or restrictive CLD (meanFEV1=46%pred, meanSVC=55%pred) performed 4 6mWT in random order in consecutive days, using the same flow of O2 if needed: 2 tests with standardised encouragement (Encouraged Test, ET) and 2 without encouragement (non-Encouraged Test, nET). Total walked distance (WD,m) and minute by minute walking speed (WS,m/min) from the 2nd ET and nET were recorded and then analysed using paired t test.
Results- During ET, WD was <300m in 14 patients (ptsA) and >300m in the remaining 14 (ptsB). The two groups were similar in terms of pulmonary function and resting arterial O2 saturation. WD recorded during ET and nET was 228 and 303 respectively in ptsA (p=0.000) and 535 and 418 in ptsB (p=0.000). WS recorded during ET (dotted line) and nET (solid line) of both ptsA (left-side) and ptsB (right-side) is shown in figure below.
Conclusion- Walked distance increases during non-encouraged as compared with encouraged 6mWT in CLD patients walking less than 300 m. Indeed, in these patients, encouragement progressively reduces walking speed along 6mWT.

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N. Barbarito, E. De Mattia, S. Cirio, G. Piaggi, B. Serri, E. Clini, S. Nava (Pavia, Gaiato-Pavullo, Italy). Walking strategy in severe chronic lung disease (CLD) patients. Eur Respir J 2005; 26: Suppl. 49, 2047

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