Table 1.

Characteristics of adults and adolescents testing the usability of the mobile telephone food record.

Characteristic		Adolescents (n = 78), n (%)	Adults (n = 57) n (%)
Gender
	Male	26 (33%)	18 (32%)
	Female	52 (67%)	39 (68%)
Age group (years)
	11–14	45 (58%)	NAa
	15–18	33 (42%)	NA
	21–40	NA	27 (47%)
	41–65	NA	30 (53%)
Ethnic group
	Asian	1 (1%)	4 (7%)
	Hispanic	7 (9%)	0 (0%)
	Non-Hispanic white	55 (70%)	45 (79%)
	Black/African American	10 (13%)	2 (4%)
	Multiple	5 (6%)	6 (11%)

^a Not applicable.