Table 5:

Correlation between volume-based features and PHQ-9 scores.

		All		Depressed		Non-depressed
	Feature	r-value	p-value	r-value	p-value	r-value	p-value
iOS	Total volume	0.16	0.02	0.22	0.01	0.18	0.08
	Volume (morning)	−0.09	0.13	−0.09	0.24	−0.14	0.13
	Volume (afternoon)	−0.05	0.37	0.01	0.99	−0.10	0.28
	Volume (night)	0.06	0.34	0.04	0.67	0.17	0.09
	Volume (midnight)	0.17	0.01	0.12	0.15	0.22	0.03
Android	Total volume	0.16	0.35	0.35	0.23	−0.27	0.20
	Volume (morning)	0.07	0.71	0.11	0.73	−0.08	0.68
	Volume (afternoon)	−0.09	0.56	−0.01	0.97	−0.10	0.62
	Volume (night)	−0.10	0.55	−0.17	0.53	−0.02	0.91
	Volume (midnight)	0.24	0.15	0.10	0.75	0.50	0.01