Inter-rater reliability and agreement of the 6-minute walk test in females with hip fractures

Jan Arnholtz Overgaard, Camilla Marie Larsen, Morten Tange Kristensen, Steffen Holtze, Kenneth Ockholm

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceForskningpeer review


The 6-minute walk test (6MWT) is widely used as a clinical outcome measure. However, the reliability and agreement of the 6MWT is unknown in individuals with hip fractures.

To evaluate the relative inter-rater reliability and agreement of the 6MWT in individuals with hip fractures.
Two senior physiotherapy students independently examined (randomized order) a convenient sample of 20 participants; their assessments were separated by two days, and testing followed instructions from the American Thoracic Society. Hip pain was assessed with the Verbal Ranking Scale.
Participants (all women) with a mean (SD) age of 78.1 ± 5.9 years performed the test within a mean of 31.5 ± 5.8 days post-surgery; 10 had a cervical and 10 a trochanteric fracture.
Excellent inter-rater reliability; ICC2.1 = 0.92 (95% CI, 0.81 - 0.97) was found, and the standard error of measurement (SEM) and smallest real difference (SRD) were calculated as 21.4 meters and 59.4 meters, respectively.
Bland-Altman plots revealed no significant difference (mean of 3.2 ± 31.5 meters, P = 0.83) between the two raters, and no heteroscedasticity was seen (r = -0.196, P = 0.41). On the contrary, participants walked a mean of 21.7 ± 22.6 meters longer, at the second trial (P = 0.002).
Participants with moderate hip fracture-related pain walked a shorter distance than those with no or light pain during the first test (P = 0.04), while this was not the case during the second (P = 0.25).
Excellent inter-rater reliability was found with a low level of measurement error, particularly for a group of participants with hip fractures, as a change of 22 meters can be considered a real change. The importance of measuring hip fracture-related pain during testing seems important when individuals with hip fracture perform the 6MWT.
Publikationsdato21. okt. 2014
Antal sider1
StatusUdgivet - 21. okt. 2014
BegivenhedDansk Ortopædisk Selskab 2014: Årsmøde - SAS, Radissson, København, Danmark
Varighed: 22. okt. 201424. okt. 2014


KonferenceDansk Ortopædisk Selskab 2014
LokationSAS, Radissson


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