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Hip kinematics predicted response to exercise program in patients with knee OA
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LAS VEGAS — Hip kinematics and patient function predicted how well a patient with knee osteoarthritis would respond to a hip-strengthening exercise program, according to results presented here.
“We see that the motion at the thigh, or the hip kinematics, in combination with measures of function at baseline is more predictive of how someone will respond to this hip-strengthening intervention,” Dylan R.J. Kobsar, MSc, said at the Osteoarthritis Research Society International World Congress.
Using tri-axial accelerometers placed on the lower back, lateral thigh, shank and dorsal foot, Kobsar and colleagues collected gait data in the most affected limb of 39 patients with knee osteoarthritis (OA) who participated in a 6-week hip-strengthening program. Researchers also collected KOOS pain and function scores. Patients were sub-grouped as non-responders, low-responders or high-responders after exercise intervention, according to Kobsar.
Results showed that while all patients experienced improvements, there was a relatively small or moderate effect size. However, Kobsar noted patients in the high-responder group experienced excellent improvements in pain, function and quality of life.
“The people who were in the non-responder sub-group, they essentially had no change or in this case, they did get slightly worse,” Kobsar said.
He noted use of a single sensor on the thigh was best at predicting how an individual would respond to the exercise intervention.
“The motion at the thigh, in combination with [patient] self-reported function, is predictive of how someone responds to a hip-strengthening program,” Kobsar said.
When looking at multisensor rate, use of either a back and thigh sensor or a back, thigh and shank sensor were the two best sensor combinations, according to Kobsar. However, results showed no significant improvement when a third sensor was added compared with the use of two sensors.
“Just having a sensor at the back and the thigh can give us enough information to determine if this program is going to be a good fit for one patient or another,” he said. – by Casey Tingle
Reference:
Kobsar D, et al. Paper #23. Presented at: Osteoarthritis Research Society International World Congress; April 27-30, 2017; Las Vegas.
Disclosure: Kobsar reports no relevant financial disclosures.