Table 2

Distribution of analysed intervention categories (primary analysis)

	Interventions (1507)	References	Studies	Participants*	Mean participants/study (Min–Max)
Psychotherapies	539	6412	3342	337 291	107 (3–7628)
Thought/Action	234	2722	1495	161 118	113 (3–7628)
Cognitive content	67	503	349	29 806	89 (10–2160)
Behavioural	108	829	523	64 374	130 (3–7628)
Cognitive and behavioural	59	1347	676	73 439	115 (3–3780)
Cognitive Functioning	135	1217	652	45 667	73 (5–750)
Social	113	1031	684	71 199	113 (6–1400)
Family-based	27	370	246	29 823	131 (11–750)
Social skills	63	532	367	34 014	101 (6–1400)
Social support	27	219	133	15 456	129 (8–1400)
Humanistic	55	489	272	43 035	162 (10–3048)
Psychoanalytic/Psychodynamic	23	65	40	3426	86 (11–563)
Other	63	552	387	33 082	88 (6–615)
Other only	45	406	309	27 013	89 (6–615)
Other and additional bough	18	146	82	6276	79 (8–360)
Other and adjunct	15	333	258	21 094	83 (6–615)
Adjuncts	38	446	334	29 156	90 (6–1109)
Both adjuncts and psychotherapy	17	334	267	21 977	84 (6–615)
Foreign Language	236	–	–	–	–
Not Analysed	6	–	–	–	–

*Studies for which the number of participants was unclear or not recorded were counted as having 0 participants for the purpose of this analysis and were not included in mean participant data.
†Unavoidable slight inaccuracies in total values when sums are taken are due to occasional overlap of reference names between separate studies, and new additions to the Cochrane Registry between the point of the coding update and the analysis of distribution.