Fig. 5: Correlations between Halo Movement scores and wearable sensor performance metrics of stability, mobility, and posture.
From: Validation of Amazon Halo Movement: a smartphone camera-based assessment of movement health
When comparing normally distributed variables, correlations were measured using the Pearson’s product-moment coefficient. For non-normally distributed variables, correlations were measured using the Spearman’s rank correlation coefficient. Hypothesis for sign of correlation between Halo Movement and functional test to support validity – Positive correlation: pelvis depth, hip angle, knee angle, shoulder ROM; Negative correlation: postural sway, toe taps, trunk angle, trunk variance, knee-ground distance, elbow variance, elbow angle.
