Table 2.

Spearman rank-correlation (coefficients and relative P-values) among prevalence of mental disorders, substance use disorders, incidence of self-harm and Social Demographic Index in the European Union, Iceland, Norway and Switzerland, years 1990-2019, both sexes, age 10-24. Significant results are highlighted in bold.

	1990			2019
	Spearman rank-correlation coefficient (P-value)			Spearman rank-correlation coefficient (P-value)
	MDs	SUDs	Self-harm	MDs	SUDs	Self-harm
MDs	1·0			1·0
SUDs	0·54 (0·001)	1·0		0·47 (0·008)	1·0
Self-harm	- 0·04 (0·80)	- 0·03 (0·86)	1·0	- 0·30 (0·10)	- 0·13 (0·47)	1·0
SDI	0·16 (0·38)	0·41 (0·02)	0·37 (0·04)	0·25 (0·17)	0·35 (0·05)	0·39 (0·03)

MDs Mental disorders; SUDs Substance use disorders; SDI Socio Demographic Index.