Table 1.

Demographics.

Characteristics		Total n (%)
Age (median range) (years)		27.0 (18-75)
Sex
	Female	1143 (45.0)
	Male	1395 (54.9)
Country
	Australia	283 (11.2)
	Canada	541 (21.3)
	United Kingdom	1108 (43.7)
	United States	497 (19.6)
	New Zealand	109 (4.3)
Education
	Above high school	1177 (46.4)
	High school or less	1361 (53.6)
Income level
	Less than US $20,000/year	1276 (50.3)
	US $21,000-49,000/year	720 (28.4)
	More than US $50,000/year	542 (21.4)
Employment status
	Employed	1151 (45.4)
	Self-employed	285 (11.2)
	Student	593 (23.4)
	Unemployed	509 (20.0)