Table 4.

Proportion of agency referred and self-referred participants recruited

Studies	Proportion of agency referred participants recruited	Proportion of self-referred participants recruited
Bouwman et al., 2017	N/A	71%
Dickens et al. 2011	61%	N/A
Fokkema and Knipscheer 2007	68%
Greenwald and Beery 2001	68%	N/A
Honigh-De Vlaming et al. 2013		48%
Ollonqvist et al. 2008	100%	N/A
Pitkala et al. 2009	N/A	15%
Slegers et al. 2008	N/A	24%
Average	74%	40%