Table 5.

Search strategies in PubMed

	Concept 1	Concept 2	Concept 3	Concept 4
	Key mental health disorders and mental health	3 aspects of MHL	Assessment tool	Study type
OR	“Mental Disorders”[Mesh: noexp] OR “mental health”[Mesh: noexp]	“health education”[tiab]	assessment*[tiab]	Reliability[tiab]
	“Substance-related disorders”[Mesh] OR substance use disorder*[tiab] OR “substance abuse”[tiab] OR “substance misuse”[tiab] OR “substance dependence”[tiab]	“health education”[Mesh]	evaluat*[tiab]	effective*[tiab]
OR	anxiety disorder*[tiab] OR “anxiety disorders”[Mesh] OR “generalized anxiety disorder”[tiab] OR “separation anxiety disorder”[tiab] OR “social phobia”[tiab] OR “specific phobia”[tiab] OR “panic disorder”[tiab] OR “posttraumatic stress disorder”[tiab]	“mental health literacy”[tiab]	measur*[tiab]	efficac*[tiab]
OR	disruptive behavior disorder*[tiab] OR “attention deficit and disruptive behavior disorders”[Mesh] OR “conduct disorder”[tiab] OR “oppositional defiant disorder”[tiab]	“health knowledge”[tiab]	test*[tiab]	“program evaluation”[Mesh] OR “program evaluation”[tiab]
OR	“unipolar depression”[tiab] OR “major depressive disorder”[tiab] OR depression[tiab] OR “depressive disorder”[Mesh] OR “depression”[Mesh]	“health curriculum”[tiab]	scale*[tiab]	Validity[tiab]
OR	“attention deficit hyperactivity disorder”[tiab] OR ADHD[tiab]	“mental health awareness”[tiab]	assessment tool*[tiab]
		awareness[Mesh]	psychometrics[Mesh] OR psychometrics[tiab]
OR		“attitude to health”[Mesh]	questionnaires[Mesh] OR questionnaire*[tiab]
OR			survey*[tiab]
OR		stigma[tiab]
OR		discrimination[tiab]
		“help seeking behavior”[tiab] OR “seeking help”[tiab]

* means various types of suffix added at the end of a word to form a derivative, e.g., -ation, -ing, and -fy