Table 1– Difference in distance between repeated 6-min walk tests in chronic obstructive pulmonary disease
First author [ref.]Subjects nTimepointMean difference (95% CI) mLimits of agreement mMean difference (95% CI) as % of baseline
Leach [4]30Same day17.1 (14–20)
Poulain [16]106 days-5
Rejeski [17]301 week224.6
Rodrigues [18]351 day35
Roomi [19]152–10 days0.65 (-15.3–16.6)-62–64
Stevens [20]21Same day33
Troosters [21]20NA15 (2.3–27.7)2.6
Iriberri [10]303 days5510.0
Sciurba [6]4701 day20.1 (16.1–24.1)-60–1077.0
Eiser [7]23Same day11
Spencer [22]44Same day27 (12–42)-71–148
Jenkins [13]245Same day37 (33–41)11.0 (9–12)
Kozu [11]451 day13
Hernandes [8]15141 day27 (24–29)-60–1207.0
Pooled mean26.36.9
  • NA: not available.