Table 1.

Search strategy

#	Searches	Results
1	mental health.mp. or Mental Health/	119202
2	Stress, Psychological/ or psychological distress.mp.	101936
3	mental hygiene.mp.	2825
4	psychological status.mp.	1787
5	(psychological adj (wellbeing or well being or health)).mp.	8043
6	psychopathology.mp. or Psychopathology/	25328
7	(psychological* adj (stress* or adapt*)).mp.	6224
8	mental* ill*.mp. or Mentally Ill Persons/	31696
9	(emotional* adj (distress* or health or wellbeing or well being)).mp.	7875
10	exp Mental Disorders/ or mental disorder*.mp.	1035426
11	1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10	1186238
12	School Health Services/ or school*.mp.	229734
13	school based.mp.	7915
14	classroom.mp.	8682
15	(school* adj3 (intervention* or program* or course* or polic* or practice* or curricul* or environment*)).mp.	17470
16	schoolchild*.mp.	10807
17	12 or 13 or 14 or 15 or 16	234430
18	resilien*.mp. or Psychological Resilience/	12613
19	(factor* adj (protect* or promoti* or external or internal or environment*)).mp.	2995
20	(strength* adj (based or focused)).mp.	507
21	(development adj3 (adolescen* or youth or child* or positive)).mp.	64536
22	(coping or adaptability or life skill* or lifeskill* or social skill*).mp.	44408
23	(competence adj3 (emotional or behavio?ral or social or cognitive)).mp.	2748
24	psychological adaptation.mp. or Adaptation, Psychological/	80080
25	(positive psychology or psychosocial or psycho social or positive education).mp.	66410
26	18 or 19 or 20 or 21 or 22 or 23 or 24 or 25	235055
27	randomized controlled trial.pt.	418071
28	controlled clinical trial.pt.	92294
29	random*.tw.	730987
30	placebo.tw.	164067
31	clinical trials as topic.sh.	180293
32	trial.tw.	382569
33	27 or 28 or 29 or 30 or 31 or 32	1223015
34	11 and 17 and 26 and 33	845
35	limit 34 to yr = "1995 -Current"	764
36	(animals not (humans and animals)).sh.	4062702
37	35 not 36	764