Table 1.

Characteristics of the subjects in the survey of SQFFQ reliability and validity

Characteristics	Number of participants	Percentage
Age (completed years)
12-17	10	9
18-29	45	41
30-39	44	40
40-44	11	10
Educational background
≥College	59	53
Middle school	36	33
Elementary school	15	14
Career
Student	53	48
Employed	51	46
Unemployed	6	6