2014/03/25 by Anne Jones, Rebecca Sealey, Michael Crowe +2
Medicine · #Knee injuries and reconstruction techniques #Shoulder Injury and Treatment #Total Knee Arthroplasty Outcomes
paper · doi:10.3109/09593985.2014.900835
openalex publication_date 2014/03/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
OBJECTIVES: The aim of this study was to assess the concurrent validity and reliability of the Simple Goniometer (SG) iPhone® app compared to the Universal Goniometer (UG). DESIGN: Within subject comparison design comparing the UG with the SG app. SETTING: James Cook University, Townsville, Queensland, Australia. PARTICIPANTS: Thirty-six volunteer participants, with a mean age of 60.6 years (SD 6.2). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: Thirty-six participants performed three standing lunges during which the knee joint angle was measured with the SG app and the UG. RESULTS: There were no significant differences in the measures of individual knee joint angles between the UG and the SG app. Pearson correlations of 0.96-0.98 and intraclass correlation coefficients of 0.97-0.99 (95% confidence interval: 0.95-1.00) were recorded for all measures. Using the Bland-Altman method, the standard error of the mean of the differences and the standard deviation of the mean of the differences were low. CONCLUSION: The measurements from the SG iPhone® app were reliable and possessed concurrent validity for this sample and protocol when compared to the UG.