Table 1.

Sociodemographic comparison between HR and HV participants.

Sociodemographic characteristics	HR (n=60)	HV (n=60)	p-Values
Age at study entry, years (median, min, max, S.D.)	19.89 (16.41, 30.21, 2.38)	22.60 (16.18, 35.57, 5.68)	<0.001⁎
Gender (n, %)
Male	31 (51.7%)	26 (43.3%)	0.465~
Female	29 (48.3%)	34 (56.7%)	0.465~
Ethnicity (n, %)†
White	56 (93.3%)	55 (91.7%)	1.000~
Mixed	2 (3.3%)	2 (3.3%)	1.000~
Asian	1 (1.7%)	2 (3.3%)	1.000~
Black	1(1.7%)	1(1.7%)	1.000~
Occupational status (n, %) (7)‡
Unemployed	20 (33.3%)	8 (13.3%)	0.004~
Employed	8 (13.3%)	27 (45.0%)	0.001~
Students	25 (41.7)	25 (41.7)	0.575~

‘P-values’ ^⁎=t-test ^~=Fisher׳s exact.

† ‘White ethnicity’ refers to subjects who are White British, White Irish, or other White backgrounds.

‘Mixed ethnicity’ refers to those who are White and Black Caribbean, mixed White and Black African, mixed White and Asian, or any other mixed backgrounds.

‘Asian ethnicity’refers to those who are Indian or Chinese.

‘Black ethnicity’ refers to subject from any Black backgrounds.

‡ Occupational status is broadly categorised into three groups.

‘Unemployed’ includes subjects who do not have a job, either they are looking for work, not looking for work (e.g., housewife), or not being able to work due to medical reasons.

‘Employed’refers to people who have full/part-time employment, or employed but currently unable to work.

‘Students’ refers to full/part-time students, including those who are also working some hours.