Identifying the participant characteristics that predict recruitment and retention of participants to randomised controlled trials involving children: a systematic review

Table 3 Retention studies – summary of predictors

				Parent									Child		Family		N’hood
Author	Predicting	Setting	Medical or non- medical intervention	Ethnicity	Education	Parent Age	Income	SES	Parental depression	Single Parenthood	Marital status	Employment	Child gender	Child age	Number of family members	Number of children	N'hood high school drop out	Density of n'hood networks
Aylward et al., 1985 [22]	Retention	Health	Medical					✔
Boggs et al., 2004 [24]	Retention	Unclear	Medical	X		X		X					X	X
Constantine et al., 1993 [26]	Retention	Mixed	Non- medical		✔	X
Cunningham et al., 1995 [27]	Retention	Community	Non- medical		X				X
Daniels et al., 2012 [30]	Retention	Community	Non- medical	X	✔	✔					X
Fernandez MA and Eyberg SM, 2009 [32]	Retention	Health	Medical					✔
Firestone P and Witt JE, 1982 [33]	Retention	Health	Medical		✔	✔	✔						✔	✔		X
Gross et al., 2001 [34]	Retention	Community	Non- medical	X	X	X	X		X		✔	X	X
Katz et al., 2001 [37]	Retention	Community	Non medical	X	X	X					X	X				✔
Miller GE and Prinz RJ, 2003 [40]	Retention	Health	Medical		X
Moser et al., 2000 [41]	Retention	Unclear	Medical	X	X	X	X		✔		X				X
Ramos-Gomez et al., 2008 [42]	Retention	Health	Non- medical	✔	X	X	✔			X
Roggman et al., 2008 [43]	Retention	Community	Non- medical		X	X			X	✔		X	✔	✔	X
Wagner et al., 2003 [45]	Retention	Community	Non- medical		✔	✔	✔
Werba et al., 2006 [46]	Retention	Health	Medical			✔		X	✔	X				X
Winslow et al., 2009 [47]	Retention	Mixed	Non- medical	✔	✔		X
Zebracki et. al., 2003 [48]	Retention	Health	Medical	X	✔	✔	X				X	X			X
			Total	8	13	12	7	4	5	3	5	4	4	4	3	2	1	1
			Significant	2	6	5	3	2	2	1	1	0	2	2	0	1	1	1
		Non-significant		6	7	7	4	2	3	2	4	4	2	2	3	1	0	0

ISSN: 1745-6215