Table 1.

Characteristics of participants from the four countries

	Canada (N = 547)	UK (N = 404)	The Netherlands (N = 407)	US (N = 417)
Male, % (N)	100 (230)	100 (202)	100 (198)	100 (211)
18–24	26.5 (61)	25.7 (52)	17.7 (35)	20.8 (44)
25–34	25.2 (58)	23.8 (48)	11.1 (22)	28.9 (61)
35–44	15.2 (35)	21.8 (44)	22.7 (45)	15.6 (33)
45–54	16.1 (37)	16.3 (33)	24.2 (48)	18.5 (39)
55–64	8.7 (20)	6.4 (13)	17.2 (34)	8.1 (17)
65–74	4.8 (11)	4.5 (9)	6.1 (12)	7.1 (15)
75+	3.5 (8)	1.3 (3)	1 (2)	1 (2)
Female, % (N)	100 (317)	100 (202)	100 (209)	100 (206)
18–24	21.4 (68)	25.8 (52)	12.0 (25)	17.5 (36)
25–34	20.2 (64)	31.2 (63)	17.2 (36)	19.4 (40)
35–44	13.9 (44)	15.8 (32)	27.3 (57)	14.6 (30)
45–54	16.1 (51)	15.4 (31)	26.7 (56)	21.8 (45)
55–64	15.5 (49)	5.9 (12)	14.4 (30)	18.9 (39)
65–74	9.8 (31)	4.5 (9)	1.9 (4)	5.3 (11)
75+	3.2 (10)	1.3 (3)	0.5 (1)	2.4 (5)
Age, Mean (SD)	40.3 (17.3)	36.4 (15.0)	42.2 (14.2)	40.4 (16.0)