title: Limitations of calculating "true" regression slope: impact on estimates of minimal important difference.
authors.forename: J W
authors.initials: JW
authors.lastname: Dodd
authors.forename: P
authors.initials: P
authors.lastname: Jones
mesh_terms: D005080:Exercise Test / Q000706:statistics & numerical data*; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000503:physiopathology; D012044:Regression Analysis