A study to translate and cross-culturally adapt the Exercise Adherence Rating Scale (EARS) into the Arabic language, and assess its psychometric properties.
Study Type
OBSERVATIONAL
Enrollment
120
Participants shall fill the EARS-Ar questionnaire three times within one month in addition to other questionnaires including the Roland Morris Disability Questionnaire (RMDQ) for low back pain (LBP) patients, and the Knee injury and Osteoarthritis Outcome Score (KOOS) for knee OA patients, in addition to the Fear-Avoidance Beliefs Questionnaire (FABQ), the Numeric Pain Rating Scale (NPRS), and the Global Rating of Change Scale (GRoC). The first time will be one week after enrolling in the study and receiving the prescribed home exercise program. the second time will be 3-6 days later to test the reliability of the EARS-Ar. After another week, participants will refill the EARS-Ar and the GRoC to test responsiveness.
King Fahd Military Medical Complex
Dhahran, Eastern Province, Saudi Arabia
RECRUITINGFloor and ceiling effect
It will be considered present if more than 15% of the sample score the lowest or highest possible total score, respectively
Time frame: 1 day
Content Validity
Assessed using the Content Validity Index (CVI) with an acceptable value of at least 0.8.
Time frame: 1 day
Construct Validity
Assessed by calculating the Spearman's correlation coefficient (ρ) between the Exercise Adherence Rating Scale-Arabic version (EARS-Ar) score and the Fear Avoidance Belief Questionnaire (FABQ), the Numeric Pain Rating Scale (NPRS), the Roland-Morris Disability Questionnaire (RMDQ), and the Knee Injury and osteoarthritis Outcome Score (KOOS) measurement tools. The coefficient is classified as follows: ρ = 0.3-0.7 moderate correlation, and \>0.7 strong correlation.
Time frame: 1 day
Internal Consistency
Assessed by calculating the Cronbach's alpha (α) and the corrected item-total correlation. A Cronbach's α value of ≥0.7, and a corrected item-total correlation, measured using the Pearson correlation coefficient, of ≥0.3 will be considered acceptable.
Time frame: 3-7 days
Test-retest Reliability
Assessed by calculating the intraclass correlation coefficient (ICC) between the EARS-Ar scores of the first two test sessions. An ICC value of \>0.8 and 0.6-0.8 will be considered as excellent and good correlation, respectively.
Time frame: 3-7 days
Responsiveness
Participating patients will be categorized according to their reported Global Rating of Change (GRoC) scores (external anchor) to either improved (GRoC≥3) or stable group (GRoC\<3 to \>-3) and a between-group comparison will be performed using an unpaired t-test.
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Time frame: 3 weeks