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Table 4 Differences within groups from baseline to 6 months in six minute walk test, cycle ergometry, St. George’s Respiratory Questionnaire score, and Short Form-12 questionnaire score

From: Low intensity, long-term outpatient rehabilitation in COPD: a randomised controlled trial

  Control group (n = 44) Training group (n = 37)
within group difference 95% confidence interval p within group difference 95% confidence interval p
6MWT (m) −21 −42 to −2 0.036 38 22 to 60 0.003
Workmax (Watt) −3.3 −7.8 to 1.2 n.s. 4.1 −0.1 to 8.2 n.s.
VO2max (l/min) −0.029 −0.084 to 0.027 n.s. 0.161 0.010 to 0.311 n.s. (0.059)
CPET time (min) −0.29 −0.71 to 0.12 n.s. 1.41 0.09 to 2.73 n.s. (0.06)
Peak heart rate during CPET (1/min) −1 −4 to 1 n.s. 2 −2 to 7 n.s.
SF-12 PCS 4.2 1.2 to 7.3 0.03 4.8 1.5 to 8.0 0.006
SF-12 MCS −0.6 −5.0 to 3.9 n.s. 2.7 −0.7 to 6.2 n.s.
SGRQ symptoms −5 −11 to 1 n.s. −2 −8 to 4 n.s.
SGRQ activity 0 −3 to 4 n.s. −5 −9 to −1 0.02
SGRQ impact −1 −4 to 2 n.s. −9 −14 to −4 0.001
SGRQ total −1 −4 to 1 n.s. −7 −10 to −3 0.001
  1. 6MWT: Six minute walk test; CPET: cardiopulmonary exercise testing; MCS: Mental health component summary score; PCS: Physical component summary score; SF-12: Short form 12 quality of life questionnaire; SGRQ: St. George’s Respiratory Questionnaire; VO2max: maximum oxygen uptake during cycle ergometry; Workmax: maximum work rate during cycle ergometry.