Table 1 Participant demographics

Age (years), mean (SD)

41.26 (14.48)

38.40 (16.06)

1.44 × 10^–8 ( ***)

Age (years), categories, N (%)

 16–29

338 (26.30)

495 (36.29)

 30–39

269 (20.93)

273 (20.01)

 40–49

274 (21.32)

238 (17.45)

 50–59

256 (19.92)

195 (14.30)

 60–69

112 (8.73)

107 (7.84)

 70 + 

36 (2.80)

56 (4.11)

AQ-10 score, mean (SD)

8.02 (1.88)

3.78 (2.60)

 < 2.22 × 10^–16 ( ***)

 Female

8.13 (1.75)

3.71 (2.67)

 < 2.22 × 10^–16 ( ***)

 Male

7.82 (2.07)

3.91 (2.48)

 < 2.22 × 10^–16 ( ***)

 Other

8.75 (1.89)

–

Sex assigned at birth, N (%)

0.117

 Female

816 (63.50)

864 (63.34)

 Male

465 (36.19)

500 (36.66)

 Other

4 (0.31)

0

Gender, N (%)

 < 2.22 × 10^–16 ( ***)

 Female

819 (60.04)

669 (52.06)

 Male

488 (35.78)

436 (33.93)

 Non-binary

36 (2.64)

122 (9.49)

 Other^a

21 (1.54)

56 (4.36)

 Missing

0

2 (0.16)

Ethnicity, N (%)

9.48 × 10^–8 ( ***)

 White

1098 (85.45)

1059 (77.64)

 Non-White

179 (13.93)

299 (21.92)

  African

5 (0.39)

13 (0.95)

  Arab

1 (0.08)

8 (0.59)

  Caribbean

7 (0.54)

1 (0.07)

  Hispanic

11 (0.86)

35 (2.57)

  Jewish

25 (1.94)

36 (2.64)

  Mixed Race

88 (6.85)

125 (9.16)

  Turkish

1 (0.08)

10 (0.73)

  Other

41 (3.19)

71 (5.21)

  Missing

8 (0.62)

6 (0.44)

Education, N (%)

2.33 × 10^–6 ( ***)

 No formal qualifications

60 (4.67)

30 (2.20)

 Further vocational qualifications

200 (15.56)

152 (11.14)

 Secondary School/ High School

220 (17.12)

250 (18.33)

 University Undergraduate

400 (31.13)

405 (29.69)

 University Postgraduate

405 (31.52)

524 (38.42)

 Missing

0

3 (0.22)

Country of Residence

 < 2.22 × 10^–16 ( ***)

 Australia

20 (1.56)

37 (2.71)

 Canada

41 (3.19)

52 (3.81)

 Germany

40 (3.11)

29 (2.13)

 Netherlands

25 (1.95)

34 (2.49)

 United Kingdom

839 (65.29)

589 (43.18)

 United States

141 (10.97)

153 (11.22)

 Other

177 (13.77)

467 (34.24)

 Missing

2 (0.16)

3 (0.22)