Table 2. Linear correlation coefficients (r) between individual 10-week features and PHQ-9 scores, and their 95% confidence intervals.

Features indicated with stars (∗) are replicated from our previous study (Saeb et al., 2015a.). Bold values indicate significant correlations.

Feature	Baseline (n = 46)	Follow-up (n = 38)	Change (n = 38)
Location variance∗	−0.29 ± 0.008	−0.43 ± 0.007	−0.34 ± 0.008
Circadian movement∗	−0.34 ± 0.006	−0.48 ± 0.006	−0.33 ± 0.009
Speed mean	−0.03 ± 0.007	−0.06 ± 0.005	0.04 ± 0.008
Speed variance	−0.07 ± 0.007	−0.06 ± 0.005	0.06 ±0.007
Total distance∗	−0.23 ± 0.004	−0.18 ± 0.006	−0.03 ± 0.006
Number of clusters∗	−0.38 ± 0.005	−0.44 ± 0.004	−0.24 ± 0.007
Entropy∗	−0.31 ± 0.007	−0.46 ± 0.005	−0.28 ± 0.008
Normalized entropy∗	−0.26 ± 0.007	−0.44 ± 0.005	−0.30 ± 0.009
Raw entropy	0.17 ± 0.009	0.22 ± 0.008	0.15 ± 0.010
Home stay∗	0.22 ± 0.008	0.43 ± 0.005	0.30 ± 0.009
Transition time∗	−0.30 ± 0.006	−0.32 ± 0.005	−0.12 ± 0.009