Table 3.

Number of hours of video and necklace data in the Exploratory Study and the Free-Living Study. Necklace valid hours exclude data with incorrect timestamp resulting from RTC going out of battery or when the necklace was not worn by the participant. Participants with obesity are highlighted in orange. Days are unique days in the data. Only data captured by both the camera and necklace were used in validation. From the 271.3 hours analyzed in the Exploratory Study and the Free-Living Study, 14.3 hours correspond to eating, while 257 hours are non-eating.

Exploratory Study						Free-Living Study
	Necklace		Overlap w/ Videos				Necklace		Overlap w/ Videos
Participant	Total hours	Ave. Per Day	Total hours	Ave. Per Day	Meal	Participant	Total hours	Ave. Per Day	Total hours	Ave. Per Day	Meal
PI	35.7	5.9	27.8	5.6	7	Pll	23.9	11.9	17.2	8.6	4
P2	8.7	1.7	3.5	0.9	7	P12	14.6	7.3	15.2	7.6	1
P3	74.6	6.8	31.6	2.9	15	P13	12.4	6.2	12.4	6.2	5
P4	20.3	3.4	10.1	3.3	5	P14	15.1	7.6	12.8	6.4	3
P5	40.4	10.1	33.3	8.3	11	P15	19.2	9.6	17.4	8.7	4
P6	19.3	3.9	4.9	1.6	9	P16	20.2	10.1	16.9	8.5	5
P7	23.0	7.7	14.0	7.0	3	P17	23.2	10.6	15.1	7.6	6
P8	20.1	2.5	5.2	0.7	11	P18	14.9	7.5	11.0	5.5	4
P9	20.0	10.0	0.7	0.4	2	P19	20.2	10.1	13.6	6.8	3
P10	15.0	2.5	3.1	0.8	6	P20	27.0	13.5	21.8	10.9	5
Total	277.1	-	134.2	-	76	Total	193.0	-	137.1	-	40