54.Weiss RA, et al. Six minute walk test in severe COPD: reliability and effect of walking course layout and length. Paper presented at ACCP Conference; September 2000; San Francisco.

55.Stevens D, Elpern E, Sharma K, Szidon P, Ankin M, Kesten S. Comparison of hallway and treadmill six-minute walk tests. Am J Respir Crit Care Med

1999;160:1540–1543.[Abstract/Free Full Text]

56.Jensen LA, Onyskiw JE, Prasad NGN. Meta-analysis of arterial oxygen saturation monitoring by pulse oximetry in adults. Heart Lung 1998; 27:387–408.[CrossRef][Medline]

57.Barthelemy JC, Geyssant A, Riffat J, Antoniadis A, Berruyer J, LaCour JR. Accuracy of pulse oximetry during moderate exercise: a comparative study. Scand J Clin Lab Invest 1990;50:533–539.[Medline]

58.Borg GAV. Psycho-physical bases of perceived exertion. Med Sci Sports Exerc 1982;14:377–381.[Medline]

59.Leach RM, Davidson AC, Chinn S, Twort CHC, Cameron IR, Batemen NT. Portable liquid oxygen and exercise ability in severe respiratory disability. Thorax 1992;47:781–789.[Abstract]

60.Mungall IPF, Hainsworth R. Assessment of respiratory function in patients with chronic obstructive airways disease. Thorax 1979;34:254–258.[Abstract]

61.Roberts CM, Bell J, Wedzicha JA. Comparison of the efficacy of a demand oxygen delivery system with continuous low flow oxygen in subjects with stable COPD and severe oxygen desaturation on walking.

Thorax 1996;51:831–834.[Abstract]

62.Hay JG, Stone P, Carter J, Church S, Eyre-Brook A, Pearson MG, Woodcock AA, Calverley PM. Bronchodilator reversibility, exercise

performance and breathlessness in stable chronic obstructive pulmonary disease. Eur Respir J 1992;5:659–664.[Abstract] 63.Grove A, Lipworth BJ, Reid P, Smith RP, Lamage L, Ingram CG, Jenkins RJ, Winter JH, Dhillon DP. Effects of regular salmeterol on lung function and exercise capacity in patients with COPD. Thorax 1996;51:689–693.[Abstract]

64.Redelmeier DA, Bayoumi AM, Goldstein RS, Guyatt GH. Interpreting small differences in functional status: The six minute walk test in chronic lung disease patients. Am J Respir Crit Care Med 1997;155:1278–1282.[Abstract]

65.Weiner P, Magadle R, Berar-Yanay N, Davidovich A, Weiner M. The cumulative effect of long-acting bronchodilators, exercise, and inspiratory muscle training on the perception of dyspnea in patients with advanced COPD. Chest

2000;118:672–678.[Abstract/Free Full Text]

66.Bittner V, Sanderson B, Breland J, Adams C, Schuman C. Assessing functional capacity as an outcome in cardiac rehabilitation: role of the 6 minute walk test. Clinical Exercise Physiology 2000.