Accelerometer based assessment of daily physical activity and sedentary time in adolescents with idiopathic scoliosis

Background Studies have shown a positive correlation between higher physical activity (PA) and health benefits. However, device-based assessment of PA and sedentary time (ST) in people with adolescent idiopathic scoliosis (AIS) has not been deeply investigated. Objective Analysis and comparison of weekend and weekdays PA and ST using multiple accelerometers in people with AIS with different curvature severity compared to healthy controls. Methods 24 participants with AIS divided into 2 groups of 12 with Cobb angles < 40 degrees and > 40 degrees, along with 12 age and BMI matched healthy controls. Daily PA and ST during four consecutive days were measured using four tri-axial accelerometers. Clinical functional assessment was performed using the scoliosis research society (SRS-22) questionnaire. Results The combined weekend and weekdays average daily step count was found to be 22% and 29% lower in the AIS groups with Cobb angle < 40 degrees and > 40 degrees, respectively, compared to the controls. The average ST was also reported to be 5% and 7% higher in the AIS groups with Cobb angle < 40 degrees and > 40 degrees, respectively, compared to the controls. The reported differences were significant in the AIS group with higher Cobb angle (p <= 0.05). No significant differences in PA or ST were reported between the AIS groups based on curvature severity. Conclusions Decreased PA and increased ST observed in patients with AIS may have long term health implications and may play a role in the disease process. The device-based assessment of PA to understand potential benefits in clinical practice is recommended.