title: Examination of the six minute walk test to determine functional capacity in people with chronic heart failure: a systematic review.
abstract: OBJECTIVE
  To evaluate the reliability and validity of the six-minute walk test (6MWT) with respect to its ability to predict functional capacity in patients with chronic heart failure.
  
  
  METHODS
  A systematic review was performed via 8 databases to assess relevant English language full-text articles published from January 1, 1980 to October 31, 2009. Participant characteristics, interventions, reliability, validity, and predictive value for each article with respect to functional capacity as defined by peak VO(2) levels were extracted and compared. Quality Assessment of Diagnostic Accuracy Studies (QUADAS) scores were determined for each study.
  
  
  RESULTS
  Fourteen studies met the selection criteria. Comparison of the studies investigating reliability shows that the 6MWT has good reproducibility. The 6MWT demonstrates moderate correlation with peak VO(2) levels, and ability to predict VO(2) (functional capacity) dependent on distance walked. Cut-off distances vary from 300 to 490 meters depending on the study; if total distance walked remains equal or less than these values, the 6MWT retains its strong predictive value.
  
  
  CONCLUSIONS
  The 6MWT has good reliability, moderate validity, and a significant ability to predict functional capacity in patients with CHF who do not walk greater than 490 meters.
authors.affiliation: Transitional DPT students, Temple University, Philadelphia, PA.
authors.forename: Brittany
authors.initials: B
authors.lastname: Pollentier
authors.forename: Sonya L
authors.initials: SL
authors.lastname: Irons
authors.forename: Courtney Manfredi
authors.initials: CM
authors.lastname: Benedetto
authors.forename: Anne-Marie
authors.initials: AM
authors.lastname: Dibenedetto
authors.forename: Dana
authors.initials: D
authors.lastname: Loton
authors.forename: Rebecca Diane
authors.initials: RD
authors.lastname: Seyler
authors.forename: Mira
authors.initials: M
authors.lastname: Tych
authors.forename: Roberta A
authors.initials: RA
authors.lastname: Newton
references.citation: Chest. 1996 Aug;110(2):325-32
references.pmid: 8697828
references.citation: Eur J Heart Fail. 2006 Jan;8(1):97-101
references.pmid: 16194620
references.citation: Circulation. 2007 Jul 17;116(3):329-43
references.pmid: 17576872
references.citation: Br Med J (Clin Res Ed). 1986 Mar 8;292(6521):653-5
references.pmid: 3081210
references.citation: Can Med Assoc J. 1985 Apr 15;132(8):919-23
references.pmid: 3978515
references.citation: Eur Heart J. 1992 Jun;13(6):789-93
references.pmid: 1623869
references.citation: J Sci Med Sport. 2001 Sep;4(3):292-300
references.pmid: 11702916
references.citation: Chest. 2003 Feb;123(2):387-98
references.pmid: 12576356
references.citation: J Card Fail. 2006 Aug;12(6):439-45
references.pmid: 16911910
references.citation: J Gerontol A Biol Sci Med Sci. 1996 Jul;51(4):M147-51
references.pmid: 8680996
references.citation: Phys Ther. 2009 Sep;89(9):873-80
references.pmid: 19723669
references.citation: Am Heart J. 1999 Oct;138(4 Pt 1):618-24
references.pmid: 10502205
references.citation: Heart. 1998 Oct;80(4):377-82
references.pmid: 9875117
references.citation: Eur Heart J. 2000 Apr;21(7):540-9
references.pmid: 10775009
references.citation: Can J Cardiol. 2008 Feb;24(2):131-5
references.pmid: 18273487
references.citation: Am Heart J. 1998 Sep;136(3):449-57
references.pmid: 9736136
references.citation: BMC Med Res Methodol. 2003 Nov 10;3:25
references.pmid: 14606960
references.citation: J Cardiopulm Rehabil Prev. 2007 Nov-Dec;27(6):368-75
references.pmid: 18197070
references.citation: Heart. 2008 Jun;94(6):748-53
references.pmid: 18070942
references.citation: JAMA. 1997 Jul 16;278(3):212-6
references.pmid: 9218667
references.citation: J Chronic Dis. 1985;38(6):517-24
references.pmid: 4008592
references.citation: Am Heart J. 1999 Aug;138(2 Pt 1):291-8
references.pmid: 10426841