Comparison of a video versus paper questionnaire on functional limitation in lower limb osteoarthritis

INTRODUCTION: The video Animated Activity Questionnaire (AAQ) was developed to assess the impact of lower limb osteoarthritis (OA) on daily functional activities. The objective of the study was to compare the video and the HOOS/KOOS paper questionnaires and to assess the effect of order of administration. MATERIAL AND METHODS: Patients recruited in the KHOALA cohort were randomized in two groups: AAQ questionnaire first (AAQ-first group) and HOOS (hip)/KOOS (knee) questionnaire first (H/KOOS-first group). Within group differences between AAQ and HOOS/KOOS scores were compared using a Student t-test. The Spearman correlation coefficient between AAQ score and HOOS/KOOS score was calculated in each group then compared, using Fisher z-transformation. RESULTS: Among 200 randomized patients, 188 (65.8 years, 66.0% women) completed the questionnaires: 99 in the AAQ-first group and 89 in the H/KOOS-first group. The AAQ score was 85.9 (SD: 13.7) in the AAQ-first versus 87.8 (SD: 13.1) in the H/KOOS-first group (p = 0.34). The H/KOOS score was 72.5 (SD: 21.2) in the AAQ-first versus 73.5 (SD: 18.4) in the H/KOOS-first group (p = 0.71). The Spearman correlation coefficient between AAQ and H/KOOS in the AAQ-first was 0.84[0.77–0.89] and 0.73[0.61–0.81] in H/KOOS-first group. These correlations differed between groups significantly (p = 0.02). CONCLUSION: This study found video AAQ and paper HOOS/KOOS questionnaire highly correlated, with a moderate but significant effect of order administration of video and paper questionnaires evidencing a stronger correlation when the videos were viewed first.