PURPOSE: This study's purposes were to examine the measurement properties of the 2-minute walk test (2MWT), to illustrate the use of reliability coefficients in clinical practice, and to estimate sample size for a subsequent validity study. METHOD: Sixteen residents of long-term care (LTC; mean age = 87 years) completed two 2MWTs with Rater A and two 2MWTs with Rater B on test days 1 and 2, approximately 1 week apart. On a third test day, subjects completed one trial of the Berg Balance Scale (BBS), timed up-and-go (TUG) test, and 6-minute walk test (6MWT) with Rater A. On 2 other test days, approximately 1 week apart, Rater A administered the 2MWT to five older adults living in a retirement facility. Absolute and relative reliability and concurrent and known-groups validity coefficients were calculated. RESULTS: No main effect for rater, trial, or occasion was found. Test-retest reliability estimates of 0.94 and 0.95 were obtained. The 2MWT demonstrated concurrent validity (r > or = 0.84) with the BBS, TUG, and 6MWT. Comparison of distance walked by LTC and retirement residents showed a difference of 72.9 m (95% CI: 44.2, 101.6). The results suggest that 90% of truly stable older adults will display random fluctuations in 2MWT performance within a boundary of 15 m. CONCLUSION: The 2MWT had sound measurement properties in this sample of LTC residents. Based on our results, 24 subjects would be required for a subsequent hypothesis-testing validity study.
PURPOSE: This study's purposes were to examine the measurement properties of the 2-minute walk test (2MWT), to illustrate the use of reliability coefficients in clinical practice, and to estimate sample size for a subsequent validity study. METHOD: Sixteen residents of long-term care (LTC; mean age = 87 years) completed two 2MWTs with Rater A and two 2MWTs with Rater B on test days 1 and 2, approximately 1 week apart. On a third test day, subjects completed one trial of the Berg Balance Scale (BBS), timed up-and-go (TUG) test, and 6-minute walk test (6MWT) with Rater A. On 2 other test days, approximately 1 week apart, Rater A administered the 2MWT to five older adults living in a retirement facility. Absolute and relative reliability and concurrent and known-groups validity coefficients were calculated. RESULTS: No main effect for rater, trial, or occasion was found. Test-retest reliability estimates of 0.94 and 0.95 were obtained. The 2MWT demonstrated concurrent validity (r > or = 0.84) with the BBS, TUG, and 6MWT. Comparison of distance walked by LTC and retirement residents showed a difference of 72.9 m (95% CI: 44.2, 101.6). The results suggest that 90% of truly stable older adults will display random fluctuations in 2MWT performance within a boundary of 15 m. CONCLUSION: The 2MWT had sound measurement properties in this sample of LTC residents. Based on our results, 24 subjects would be required for a subsequent hypothesis-testing validity study.
Keywords:
2-minute walk test; frail; older adults; reliability; validity
Authors: Jonathan F Bean; Dan K Kiely; Suzanne G Leveille; Seth Herman; Charlie Huynh; Roger Fielding; Walter Frontera Journal: J Gerontol A Biol Sci Med Sci Date: 2002-11 Impact factor: 6.053
Authors: G H Guyatt; S O Pugsley; M J Sullivan; P J Thompson; L Berman; N L Jones; E L Fallen; D W Taylor Journal: Thorax Date: 1984-11 Impact factor: 9.139
Authors: Dina Brooks; Judith P Hunter; Janet Parsons; Emma Livsey; Janice Quirt; Michael Devlin Journal: Arch Phys Med Rehabil Date: 2002-11 Impact factor: 3.966
Authors: M Katherine Sayre; Herman Pontzer; Gene E Alexander; Brian M Wood; Ivy L Pike; Audax Z P Mabulla; David A Raichlen Journal: Philos Trans R Soc Lond B Biol Sci Date: 2020-09-21 Impact factor: 6.237
Authors: David A Scalzitti; Kenneth J Harwood; Joyce R Maring; Susan J Leach; Elizabeth A Ruckert; Ellen Costello Journal: Int J MS Care Date: 2018 Jul-Aug
Authors: Richard W Bohannon; Deborah Bubela; Susan Magasi; Heather McCreath; Ying-Chih Wang; David Reuben; William Z Rymer; Richard Gershon Journal: BMC Res Notes Date: 2014-04-25