Comparison of the Accuracy of Quadriceps Isometric Exercise between Using Quadriceps Education Device (QED) and Not Using QED for Osteoarthritic Knee Patients: A Randomized Controlled Trial
Satit Thiengwittayaporn MD*, Pumibal Wetpiryakul MD*, Yupordee Foosakun MD**, Taweep Ngamsom MEng***, Pramote Vathanavit MEng***, Jassadopong Pintongtun MEng***
Affiliation : * Department of Orthopaedics Surgery, Bangkok Metropolitan Administration Medical College and Vajira Hospital, Bangkok, Thailand ** Department of Rehabilitation, Bangkok Metropolitan Administration Medical College and Vajira Hospital, Bangkok, Thailand *** Department of Production Technology, Faculty of Engineering, King Mongkut’s Institute of Technology North Bangkok, Bangkok, Thailand
Objective : To compare the accuracy when osteoarthritic knee patients do quadriceps isometric exercise using
quadriceps education device (QED) and not using QED after being instructed on the exercise program by
doctors.
Material and Method: A randomized controlled study was conducted. Sixty patients were divided into 2
groups, QED group (patients using QED) and non-QED group (patients not using QED). We developed the
Quadriceps Educational Device (QED). All patients were instructed on the quadriceps exercise method.
Patients in the QED group were instructed to use the QED device and received the QED to take back and
conducted the exercises at home. After 2 weeks, both groups of patients were tested by asking them to do
the quadriceps exercise without using the QED. The accuracy of the quadriceps exercise was analyzed to
determine the statistical difference. Chi-square test was used for statistical analysis.
Results : The number of patients in the QED group that conducted accurate quadriceps exercise totaled
23 patients (79.3%), while the number of non-QED was reduced to 8 patients (28.6%). The results were
significantly different in statistic (p < 0.01). Patients in the QED group conducted the quadriceps exercise
more accurately than the non-QED group.
Conclusion : The osteoarthritic knee patients, who used QED, can do the quadriceps isometric exercise more
accurately than those who did not use the QED after being instructed on the exercise program by doctors.
Keywords : Osteoarthritis, Quadriceps isometric exercise, Quadriceps education device (QED)
