RESEARCH LETTER The

first reference equations for the 6-minute walk distance over a 10 m course Rationale As primary care practice space is mostly limited to 10 m, the 6-minute walk test (6MWT) over a 10 m course is a frequently used alternative to evaluate patients ’ performance in COPD. Considering that course length significantly affects distance walked in 6 minutes (6MWD), this study aims to develop appropriate reference equations for the 10 m 6MWT. Methods 181 healthy subjects, aged 40– 90 years, performed two standardised 6MWTs over a straight 10 m course in a cross-sectiona