Six-minute-walk test in chronic obstructive pulmonary disease: minimal clinically important difference for death or hospitalization.
Polkey MI, Spruit MA, Edwards LD, Watkins ML, Pinto-Plata V, Vestbo J, Calverley PM, Tal-Singer R, Agust? A, Bakke PS, Coxson HO, Lomas DA, MacNee W, Rennard S, Silverman EK, Miller BE, Crim C, Yates J, Wouters EF, Celli B. Six-minute-walk test in chronic obstructive pulmonary disease: minimal clinically important difference for death or hospitalization. Am J Respir Crit Care Med. 2013 Feb 15; 187(4):382-6.