Table 2.

Overall physiological data yield statistics computed from all person days of both studies using the hierarchical framework proposed in Figure 1.

Factors	Study 1	Study 2
Study Length (person days)	922	210
Active period	14.57±2.8	13.02±2.01
Phone off	0.78±0.23	2.2±0.31
Phone on	13.73±2.2	10.82±1.6
Sensor off	0.17±0.06	0.37±0.04
Sensor Battery Down	0.03±0.32	0.08±0.88
Sensor off Body	0.34±1.31	0.11±0.19
Sensor on Body	13.22±1.86	10.45±1.55
Packet Loss	0.27±0.01	0.18±0.04
Wireless Disconnection	0.04±0.01	0.15±0.01
ECG
Delay in Attachment	0.22±0.14	0.3±0.10
Intermittent Loosening	1.17±0.09	1.8±0.04
Improper Attachment	0.19±1.72	0.13±0.71
Acceptable Data	11.33±0.88	7.87±0.31
Activity	2.26±0.18	1.32±0.06
Usable	9.06±0.72	6.55±0.26
RIP
Delay in Attachment	0.12±0.1	0.05±0.06
Intermittent Loosening	0.72±0.05	0.17±0.01
Improper Attachment	0.20±0.63	0.1±0.51
Acceptable Data	11.84±0.52	9.83±0.55
Activity	2.36±0.11	1.66±0.10
Usable	9.47±0.42	8.18±0.47

Values (mean±std) are in hours per participant per day. To show the subject variation, standard deviation is added with each mean value.