OBJECTIVES: To assess the test-retest reliability of the 400-m usual-pace walk test (400-MWT), and to determine whether the 4-m walk test predicts inability to walk 400 m. DESIGN: Observational. SETTING: Community, 20-m tract course. PARTICIPANTS: Sixty study participants (aged>or=65) were enrolled from the community and met the following eligibility criteria: self-reported difficulty in two or more of four functional domains (mobility and exercise tolerance, upper extremity function, basic self-care, higher functional tasks of independent living) and a score of 18 or higher on the Mini-Mental State Examination. METHODS: The 400-MWT and 4-m walk test were each repeated within 7 days. RESULTS: The mean age+/-standard deviation of the study population was 84.3+/-6.3; 88.3% were women. Nineteen participants (31.7%) failed both 400-MWTs, and 41 successfully completed both tests (kappa=1). Mean walking speed for the 4-m test was 0.87+/-0.18 m/s for those who completed the 400-MWT and 0.53+/-0.17 m/s for those who failed (P<.001). The Spearman correlation coefficient between 4-m and 400-m walking speeds was 0.93. The estimated area under the receiver operating characteristic curve between 4-m walking speed and the ability to perform the 400-MWT was 0.91. The 4-m gait speed averaged less than 0.6 m/s in 80% of subjects who failed the 400-MWT. CONCLUSION: The test-retest reliability for inability to complete the 400-MWT is high. Four-m walking speed is highly predictive of ability to perform the 400-MWT. These findings may prove useful to future clinical trials and observational studies that involve assessment of mobility limitations in older adults.
OBJECTIVES: To assess the test-retest reliability of the 400-m usual-pace walk test (400-MWT), and to determine whether the 4-m walk test predicts inability to walk 400 m. DESIGN: Observational. SETTING: Community, 20-m tract course. PARTICIPANTS: Sixty study participants (aged>or=65) were enrolled from the community and met the following eligibility criteria: self-reported difficulty in two or more of four functional domains (mobility and exercise tolerance, upper extremity function, basic self-care, higher functional tasks of independent living) and a score of 18 or higher on the Mini-Mental State Examination. METHODS: The 400-MWT and 4-m walk test were each repeated within 7 days. RESULTS: The mean age+/-standard deviation of the study population was 84.3+/-6.3; 88.3% were women. Nineteen participants (31.7%) failed both 400-MWTs, and 41 successfully completed both tests (kappa=1). Mean walking speed for the 4-m test was 0.87+/-0.18 m/s for those who completed the 400-MWT and 0.53+/-0.17 m/s for those who failed (P<.001). The Spearman correlation coefficient between 4-m and 400-m walking speeds was 0.93. The estimated area under the receiver operating characteristic curve between 4-m walking speed and the ability to perform the 400-MWT was 0.91. The 4-m gait speed averaged less than 0.6 m/s in 80% of subjects who failed the 400-MWT. CONCLUSION: The test-retest reliability for inability to complete the 400-MWT is high. Four-m walking speed is highly predictive of ability to perform the 400-MWT. These findings may prove useful to future clinical trials and observational studies that involve assessment of mobility limitations in older adults.
Authors: Anne B Newman; John A Dodson; Timothy S Church; Thomas W Buford; Roger A Fielding; Stephen Kritchevsky; Daniel Beavers; Marco Pahor; Randall S Stafford; Anita D Szady; Walter T Ambrosius; Mary M McDermott Journal: JAMA Cardiol Date: 2016-08-01 Impact factor: 14.676
Authors: Mark A Espeland; Thomas M Gill; Jack Guralnik; Michael E Miller; Roger Fielding; Anne B Newman; Marco Pahor Journal: J Gerontol A Biol Sci Med Sci Date: 2007-11 Impact factor: 6.053
Authors: Sonja Vestergaard; Kushang V Patel; Michael P Walkup; Marco Pahor; Anthony P Marsh; Mark A Espeland; Stephanie Studenski; Thomas M Gill; Timothy Church; Jack M Guralnik Journal: J Am Geriatr Soc Date: 2008-12-10 Impact factor: 5.562
Authors: Andrew S Layne; Fang-Chi Hsu; Steven N Blair; Shyh-Huei Chen; Jennifer Dungan; Roger A Fielding; Nancy W Glynn; Alexandra M Hajduk; Abby C King; Todd M Manini; Anthony P Marsh; Marco Pahor; Christine A Pellegrini; Thomas W Buford Journal: Arch Phys Med Rehabil Date: 2016-08-25 Impact factor: 3.966
Authors: Magdalena I Tolea; Paul T Costa; Antonio Terracciano; Michael Griswold; Eleanor M Simonsick; Samer S Najjar; Angelo Scuteri; Barbara Deiana; Marco Orrù; Marco Masala; Manuela Uda; David Schlessinger; Luigi Ferrucci Journal: J Gerontol B Psychol Sci Soc Sci Date: 2010-01-05 Impact factor: 4.077
Authors: Sarinnapha Vasunilashorn; Antonia K Coppin; Kushang V Patel; Fulvio Lauretani; Luigi Ferrucci; Stefania Bandinelli; Jack M Guralnik Journal: J Gerontol A Biol Sci Med Sci Date: 2009-01-31 Impact factor: 6.053