Single and combined clinical postural stability tests for chronic ankle instability
Less stability at the ankle joint arises while returning to activity before sprained ligaments have fully healed causing them to heal in a stretched position. This can give way to a condition called as Chronic Ankle Instability (CAI), and an increased risk of ankle sprains.
About 10 to 20 out of 100 people with ankle sprains evolve as chronic ankle instability. It is regarded to be chronic, if the ankle joint still gives way too easily, 6 months after the first sprain, or if the ankle is sprained again within 6 months of the first sprain. The study was done in Biomechanics Laboratory, to decide whether a single or/and combined clinical tests match group membership based on self-reported ankle function.
The participants (58 meeting inclusion/exclusion criteria) were divided into two groups: chronic ankle instability (CAI) group (n = 25) who described <=25 on Cumberland Ankle Instability Tool (CAIT) and a history of moderate-severe ankle sprain(s) and; a control group (n = 33) who reported >=29 on CAIT and no history of ankle sprain(s). Participants accomplished the following tests: Star Excursion Balance Test (SEBT), Foot Lift Test (FLT), Single-Leg Hop Test (SLHT), and Time in Balance Test (TIB) in a randomized order.
The key outcomes comprised of the mean of SEBT reaching distance normalized to percentage leg length. The mean number of errors in FLT was noted. The means were calculated when SLHT and TIB were reported as time in seconds. The most penurious combination of tests produced a correct matching 70.69% (41/58) of participants into groups, which was notably better than chance. The multiple correlation coefficients (R value) for integrating SLHT and SEBT was 0.39.
This study revealed that the use of SLHT and SEBT resulted in improved recognition of participants deputed into the CAI or control groups. Self-report perception of ankle function render limited information for clinicians and researchers. To determine deficits and intervention effectiveness, using multiple clinical function tests may be more fruitful.