Table 1.

Characteristics for the sample aged 13–19 years. The Young-HUNT Study³⁶

		Young HUNT1 1995–1997		Young HUNT3 2006–2008		Young HUNT4 2017–2019
		N	%	N	%	N	%
Age	13–19 years	8980	100	8199	100	8066	100
Sex	Girls	4463	49.7	4128	50.4	4106	50.9
	Boys	4517	50.3	4071	49.6	3960	49.1
HSCL-5*	Low	7412	82.5	6441	78.6	5410	67.1
	High	1372	15.3	1520	18.5	2404	29.8
	Missing	196	2.2	238	2.9	252	3.1
Total		8980	100	8199	100	8066	100

*Hopkins Symptom Checklist-5 (HSCL-5) cut-off ≥2.