Descriptor	#	Search terms
Core PTSD and trauma terminology	1	exp "stress disorders, traumatic"/ or "trauma and stressor related disorders"/
	2	(trauma* or posttrauma* or psychotrauma* or PTSD or PTSS or CPTSD).ti,ab,kf.
	3	(stress adj (disorder? or syndrome? or reaction?)).ti,ab,kf.
	4	((disturb* adj2 self‐organi#ation) or DSO).ti,ab,kf.
	5	(((extreme or complex or chronic or acute) adj stress) or DESNOS).ti,ab,kf.
	6	((("enduring personality change") adj3 catastroph*) or EPCACE).ti,ab,kf.
	7	(reexperienc* or re‐experienc* or flashback? or hypervigil*).ti,ab,kf.
Historical PTSD‐terminology	8	(shellshock* or shell‐shock*).ti,ab,kf.
	9	((war or combat or battle or torture) adj (neuros#s or syndrome?)).ti,ab,kf.
Adverse childhood experiences	10	"adverse childhood experiences"/
	11	(adverse adj (childhood or experience? or "life event?")).ti,ab,kf.
	12	(adversit* or ACEs).ti,ab,kf.
Victimisation	13	"disaster victims"/ or "crime victims"/
	14	(victim* or polyvictim*).ti,ab,kf.
Abuse and neglect	15	exp "child abuse"/ or "physical abuse"/ or "emotional abuse"/
	16	((abuse? or abusive) adj2 (survivor? or child* or p?ediatric or physical* or emotional* or sexual* or psychologic* or domestic* or verbal* or famil* or parent* or dating or partner* or relation* or interpersonal* or household? or home? or environment?)).ti,ab,kf.
	17	(neglect* adj2 (survivor? or child* or p?ediatric or physical* or emotional* or psychologic* or domestic* or famil* or parent* or abuse? or abusive or household? or home? or environment?)).ti,ab,kf.
	18	(maltreat* or mistreat*).ti,ab,kf.
Sexual/non‐sexual violence and harassment	19	violence/ or exp "sex offenses"/ or incest/ or "sexual harassment"/ or exp "harassment, non‐sexual"/ or "exposure to violence"/ or "domestic violence"/ or exp "gender‐based violence"/ or "intimate partner violence"/ or exp "gun violence"/ or exp "ethnic violence"/
	20	(rape? or molest* or incest* or assault* or traffick* or harass* or bully* or bullied or cyberbull* or hazing or stalk* or kidnap*).ti,ab,kf.
	21	(sex* adj2 (forced or unwanted or coerc*)).ti,ab,kf.
	22	(violen* adj2 (survivor? or child* or physical* or emotional* or sexual* or psychologic* or domestic* or verbal* or famil* or parent* or dating or partner* or relation* or interpersonal* or gender‐based or household? or home? or environment?)).ti,ab,kf.
War and terror exposure	23	exp terrorism/ or refugees/ or "war exposure"/ or exp "armed conflicts"/ or exp "war crimes"/ or torture/
	24	(war or wars or refugee? or "forc* displace*" or "child soldier?" or "moral injur*" or torture? or hostage? or terror* or shooting? or bomb* or explosion?).ti,ab,kf.
Disaster exposure	25	disasters/ or exp "natural disasters"/
	26	(disaster? or catastrophe? or hurricane? or tornado? or cyclon* or earthquake? or tsunami? or flood* or fire? or wildfire? or volcan* or avalanche?).ti,ab,kf.
Accidents	27	"accidents, traffic"/ or "accidents, aviation"/
	28	(accident? or crash*2 or collision?).ti,ab,kf.
Grief and bereavement	29	exp bereavement/
	30	(grief or griev* or bereave*).ti,ab,kf.
Condition	31	or/1‐30
Psychological therapies (unspecified)	32	exp psychotherapy/ or counseling/
	33	(psychotherap* or psycho‐therap* or talk‐therap* or counsel?ing or coaching).ti,ab,kf.
	34	((psychosocial* or psycho‐social* or psychologic* or mental* or talk‐based) adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)).ti,ab,kf.
Cognitive and behavioural therapies	35	((cognitive adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique? or restructuring or reappraisal? or remediation or processing or behavio?r*)) or CBT).ti,ab,kf.
	36	((behavio?r* adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique? or activation? or modification? or dialectic*)) or DBT).ti,ab,kf.
	37	((exposure adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique? or prolonged or narrative or written or virtual or VR or augmented or imaginal or graded or gradual or interoceptive)) or KIDNET).ti,ab,kf.
	38	("implosive therapy" or "flooding therapy" or "imaginal flooding" or "stress inoculation" or "virtual reality" or "augmented reality").ti,ab,kf.
	39	((metacognitive or meta‐cognitive) adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique? or remediation or processing)).ti,ab,kf.
	40	((imagery adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique? or rescripting or rehearsal or guided)) or ImRs).ti,ab,kf.
	41	(third‐wave or mindfulness or meditat* or "acceptance and commitment" or "compassion‐focus?ed" or MBCT or MBSR).ti,ab,kf.
	42	(schema? adj3 (therap* or maladaptive or mode?)).ti,ab,kf.
Psychodynamic therapies	43	psychoanalysis/
	44	(psychoanaly* or psycho‐analy* or psychodynamic* or psycho‐dynamic*).ti,ab,kf.
	45	(((interpersonal or attachment or relational) adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)) or IPT).ti,ab,kf.
Systemic therapies	46	((system? or systemic or multisystem* or milieu) adj (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)).ti,ab,kf.
	47	((system?‐level or system?‐based) adj (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)).ti,ab,kf.
	48	(((family or parent or caregiver) adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)) or CFTSI).ti,ab,kf.
Humanistic therapies	49	((humanistic or existential or gestalt or person‐cent?red or client‐cent?red or patient‐cent?red or non‐directive or nondirective or narrative or emotion* or solution‐focus?ed) adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)).ti,ab,kf.
Expressive therapies	50	((expressive or experiential or creative or play or doll? or toy? or puppet* or art or paint* or drawing or music* or dance or roleplay* or role‐play*) adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)).ti,ab,kf.
	51	(sandplay or sand‐play or sandtray or sand‐tray or theraplay or thera‐play or psychodrama or psycho‐drama).ti,ab,kf.
	52	(writing adj1 (therap* or intervention? or treatment? or approach or approaches or program? or programmes? or technique? or trauma or expressive)).ti,ab,kf.
Body‐oriented and somatic psychotherapies	53	"mind‐body therapies"/
	54	((body‐oriented or mind‐body or somatic or psychosomatic or psycho‐somatic or sensorimotor) adj3 (therap* or interventions? or treatment? or approach or approaches or program? or programme? or technique?)).ti,ab,kf.
	55	"somatic experiencing".ti,ab,kf.
Integrative therapies and psychotherapeutic components	56	((integrative or eclectic) adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)).ti,ab,kf.
	57	(psychoeducat* or psycho‐educat*).ti,ab,kf.
	58	((skill? or stabili#ing or stabili#ation or supportive or problem‐solving) adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique? or training)).ti,ab,kf.
	59	(trauma adj (focus* or informed or based or specific or sensitive)).ti,ab,kf.
	60	((PTSD or trauma) adj (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)).ti,ab,kf.
	61	(memory adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique? or training or reconsolidation)).ti,ab,kf.
	62	((desensiti#ation adj2 (reprocessing or eye‐movement)) or EMDR).ti,ab,kf.
	63	("accelerated resolution" or "emotional freedom" or "thought field").ti,ab,kf.
	64	(crisis adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programmes? or technique?)).ti,ab,kf.
	65	(debrief* or "critical incident stress" or "traumatic incident reduction").ti,ab,kf.
Setting and delivery	66	"community mental health services"/ or "school mental health services"/ or "mental health teletherapy"/ or "distance counseling"/
	67	((community‐based or school‐based) adj3 (therap* or intervention? or treatment? or approach or approaches or program? or programme? or technique?)).ti,ab,kf.
	68	((remote* or online or ehealth or e‐health or mhealth or m‐health or e‐mental or tele* or web or app or virtual* or mobile or internet or phone or smartphone or video‐based or digital*) adj3 ( therap* or intervention? or treatment? or approach or approaches or program? or programme? or techniques?)).ti,ab,kf.
	69	(teletherap* or telepsycho*).ti,ab,kf.
Intervention	70	or/32‐69
Children and adolescents	71	exp child/ or "child, abandoned"/ or "child, adopted"/ or "child, foster"/ or "child, orphaned"/ or "child, unwanted"/ or "child, hospitalized"/ or "child, institutionalized"/ or infant/ or adolescent/ or "adolescent, hospitalized"/ or "adolescent, institutionalized"/
	72	(child? or children? or childhood? or kid? or boy? or girl? or teen* or preteen* or youth? or youngster? or adolescen* or preadolescen* or pube* or prepube* or juvenile? or minors or p?ediatric or toddler* or infant* or underage? or under‐age? or schoolchild* or school‐age? or grader? or schooler? or preschooler? or highschooler? or kindergartener? or orphan*).ti,ab,kf.
	73	((student? or pupil? or age?) adj2 (school? or preschool? or highschool? or kindergarten? or pre‐k or grade)).ti,ab,kf.
Age group	74	or/71‐73
Adapted from Cochrane's highly sensitive search strategies for identifying randomised trials in MEDLINE Ovid and Embase Ovid; 2023 revisions (Lefebvre 2024). We adapted these two search strategies into one that better aligned with psychological therapies, could be used more consistently across our included databases, and maintained high sensitivity.	75	exp “controlled clinical trial”/
	76	"random allocation"/
	77	"comparative study"/
	78	(trial or RCT).ti,ab,kf.
	79	(random* or quasirandom*).ti,ab,kf.
	80	"cross‐over studies"/
	81	(crossover or cross‐over).ti,ab,kf.
	82	placebo.ti,ab,kf.
	83	"double‐blind method"/ or "single‐blind method"/
	84	((singl# or doubl#) adj blind*).ti,ab,kf.
	85	((parallel or intervention or control) adj group?).ti,ab,kf.
	86	((alternate or group? or intervention? or patient? or subject? or participant? or client?) adj5 (match or matched or assign* or allocation)).ti,ab,kf.
	87	"sample size"/ and control.ab.
	88	(assigned or allocated).ti,ab.
	89	(compare or compared or comparison or comparing).ti,ab,kf.
	90	"control groups"/
	91	(control* adj7 (study or design or trial?)).ti,ab,kf.
	92	"human experimentation"/ or "therapeutic human experimentation"/
	93	or/75‐92
	94	(exp animals/ or exp "animal experimentation"/) not (human?.ti,ab,kf. or humans/ or exp "human experimentation"/)
	95	(nonrandom* not random*).ti,ab,kf.
	96	(("systematic review" or "scoping review" or "narrative review" or "integrative review" or "umbrella review" or "rapid review" or "literature review") not (trial or study)).ti.
	97	or/94‐96
Study design	98	93 not 97
	99	31 and 70 and 74 and 98