TABLE 1.

Assessment of articles from the literature search

Critical Appraisal Skills Programme criteria	Clear statement of aims	Appropriate methodology	Appropriate research design	Appropriate recruitment strategy	Appropriate data collection method	Research relations considered	Considered ethical issues	Rigorous analysis	Clear findings	Valued research	Total score/20
Berqvist et al. (26)	2	2	2	2	2	2	2	2	2	2	20
Berqvist et al. (2)	2	2	2	2	2	2	2	2	2	2	20
Carabello et al. (20)	2	2	2	1	1	2	1	2	2	2	17
Christodoulides et al. (22)	2	2	2	1	1	2	2	2	1	1	16
Coppola et al. (27)	2	2	2	1	1	2	1	2	2	2	17
Dressler et al. (21)	1	1	1	1	2	2	2	1	1	1	13
Hallböök et al. (33)	1	2	2	1	2	2	1	2	2	2	17
Hawkes and Levine (23)	2	1	1	1	1	2	2	2	1	2	15
Kim et al. (30)	2	1	1	1	2	2	1	2	2	2	16
Kossof et al. (11)	1	1	2	2	2	0	1	0	2	2	13
Lambrechts et al. (32)	2	2	2	2	1	2	2	1	1	1	16
McNamara et al. (29)	1	2	2	2	2	2	2	2	2	2	19
Raju et al. (25)	2	2	2	2	1	1	1	2	1	1	15
Selter et al. (12)	1	2	2	2	2	2	2	2	2	2	19
Sharma et al. (28)	2	2	1	2	2	2	1	0	1	1	14
Tagliabue et al. (31)	1	1	1	1	2	2	2	2	1	1	14
Taub et al. (7)	2	1	1	2	1	2	2	2	1	2	16