Smartphone-based activity measurements in patients with newly diagnosed bipolar disorder, unaffected relatives and control individuals

International Journal of Bipolar Disorders

Table 3 Associations between self-reported^a and automatically generated^b smartphone-based data for all participants in the study owning an Android smartphone

	Model 1			Model 2
	B	95% CI	p	B	95% CI	p
Self-reported smartphone-based activity
Step count (number/day)	0.37	0.30;0.43	< 0.001	0.37	0.30;0.44	< 0.001
Screen time (seconds/day)	−0.13	−0.15;−0.11	< 0.001	−0.13	−0.15;−0.11	< 0.001
Screen on (number/day)	0.005	0.004;0.005	< 0.001	0.005	0.004;0.005	< 0.001
Call duration (seconds/day)	−0.20	−0.34;−0.07	0.004	−0.20	−0.34;−0.07	0.004
Incoming calls (number/day)	0.01	−0.001;0.027	0.063	0.013	−0.001;0.027	0.064
Outgoing calls (number/day)	0.03	0.02;0.04	< 0.001	0.030	0.02;0.04	< 0.001
Missed calls (number/day)	0.015	−0.001;0.030	0.064	0.015	−0.001;0.030	0.063
Incoming text-messages (number/day)	0.006	0.003;0.009	< 0.001	0.006	0.003;0.009	< 0.001
Outgoing text-messages (number/day)	0.005	0.003;0.007	< 0.001	0.005	0.003;0.007	< 0.001

Significant p values are given in italic
Model 1 unadjusted, Model 2 adjusted for age and sex.
^aSelf-reported smartphone-based activity rated on a scale from −3 to + 3.
^bAutomatically generated smartphone-based activity features reflecting social parameters and physical activity