Table 3.

Summary of the quality of the data and studies contributing to the quantitative studies included in this systematic review

	Study design	Participants and recruitment	Comparison group	Number of participants	Instruments	Total
Behan et al. [10], International	0	2	0	3	0	5
Carotenuto et al. [24], Italy	0	0	3	1	2	6
Madsen et al. [25], Denmark	1	2	3	1	0	7
Maglione et al. [23], Italy	3	0	0	1	0	4
McManus et al. [20], UKa	0	1	0	2	2	5
McManus et al. [11], UKa	0	1	2	2	2	7
Mirra et al. [22]	1	0	0	1	2	4
Pifferi et al. [21], Italy	1	1	2	2	2	8
Taelman et al. [27], Belgiumb	0	0	0	1	0	1
Taelman et al. [26], Belgiumb	0	1	0	1	0	2

Scoring was according to Criteria for Rating Methodological Quality of Quantitative Studies adapted from previous studies [13–15]

^aSame UK sample n

^bSame Belgian sample