Fig. 1. Correlations between sensor-derived physical activity metrics and clinical scores.

A Correlation map displaying correlation coefficients (r or ρ) between 45 sensor-derived measures of physical activity and clinical scores of FRDA, as well as disease duration, GAA and FXN. Spearman correlation analysis was used to quantify the relationship between sensor-derived metrics and clinical scores, including FA-ADL, FA-ADL LL, mFARS, and mFARS Section E. Meanwhile, Pearson correlation analysis was employed to evaluate the association between sensor-derived metrics and biological outcomes, such as 25FWT, GAA, FXN, and disease duration. B Median steps per walking bout versus FA-ADL, mFARS, and mFARS Section E. Data represent n = 39 participants. All physical activity metrics are averaged daily values measured over 7 consecutive days.