Intra-rater Reliability of a Qualitative Landing Scale for the Single-Hop Test: A Pilot Study.
Maxime V Measson, Matthew P Ithurburn, Alexandre Jm Rambaud
PMID 35391866WHAT IT FOUND
A single physiotherapist scored landing errors on a single-hop test twice, two weeks apart, for 17 healthy athletes.
Overall scores were consistent. But individual error items were unreliable, and scoring one limb took 30 minutes of video analysis.
Key findings
01Overall landing error scores showed good consistency when the same rater scored the same videos twice.
02Individual error items showed very poor consistency, with agreement as low as 62% for tibial rotation.
03The 2D video analysis required 30 minutes to score a single limb, limiting real-time clinical use.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study included only healthy young athletes, so reliability in patients with ACL injuries is unknown. The sample was small (17 participants) and predominantly male. The scale items were not previously validated. Scoring took 30 minutes per limb using 2D video, which is too long for most clinical settings. Only one rater was tested, so inter-rater reliability is unknown.
The easy way to misread this
Do not interpret the good overall reliability as evidence that individual movement errors can be reliably identified. The study found that specific items, such as tibial rotation, had very poor agreement (62%), and the scale has not been tested in injured patients.