Table 2. Selected Characteristics of the Study Participantsç.

Study	Sample	Participant Characteristics			Child Age (Years)
		Age (Years)	Yrs. of School	Percent Female	Percent Married	Mean Age	Age Range
Ahlert & Greeff (2012)	54	34	14	93	63	5	1-10
Bigalke (2011)	125	40	10	100	85	7	4-18
Bigalke (2015)	115	36	16	73	86	5	0-10
Bishop & Greeff (2015)	42	56	NR	83	43	31	24-38
Brown et al. (2010)	31	NR	NR	55	NR	NR	1-7
Chen (2008)	80	43	13	57	91	6	1-15
Chen & Clark (2010)	126	43	10	57	73	NR	NR
Chen et al. (2014)	122	40	9	87	97	10	4-16
Chen et al. (2015)	113	46	14	57	68	32	22-42
Chick (1998)	75	42	12	94	88	13	2-21
Choi (2015)	145	NR	14	82	NR	12	10-22
Donnelly (1994)	27	33	14	67	NR	4	1-5
Failla & Jones (1991)	57	29	12	100	75	4	0-6
Gralton (2017) Sample 1	48	31	14	50	65	0	NA
Gralton (2017) Sample 2	110	31	15	50	100	0	NA
Greeff & Human (2004)	39	46	13	82	100	16	11-21
Greeff & van der Merwe (2004)	98	42	NR	91	0	15	12-19
Greeff et al. (2006)	68	46	10	85	0	19	16-30
Greeff & Aspeling (2007)	65	46	13	85	0	19	12-30
Greeff & du Toit (2009)	38	43	13	89	100	16	7-26
Greeff & Fillis (2009)	51	35	11	100	0	16	13-19
Greef & van der Walt (2010)	34	36	NR	86	79	3	1-4
Greeff & Lawrence (2012)	38	NR	9	82	79	NR	NR
Greeff et al. (2012)	68	47	13	75	100	20	15-19
Greeff & Nolting (2013)	40	40	NR	93	100	13	8-18
Greeff et al. (2014)	25	44	14	69	92	NR	NR
Huang (1996) Sample 1	76	32	14	100	96	4	2-7
Huang (1996) Sample 2	76	34	14	0	96	4	2-7
Koegelenberg (2013)	51	41	12	88	71	4	1-16
Ladewig et al. (1992) Sample 1	37	36	14	100	95	8	6-9
Ladewig et al. (1992) Sample 2	21	39	14	100	95	8	6-9
Lapin (2015)	183	26	NR	100	NR	2	1-3
McCubbin et al. (1998)	150	29	NR	92	52	3	0-6
McNaughton et al. (2004)	182	36	9	100	83	10	8-12
McStay & Trembath (2014) S1	98	42	13	100	91	9	1-16
McStay & Trembath (2014) S2	98	44	12	0	91	9	1-6
Nabors et al. (2013)	95	32	NR	75	77	5	0-24
Olsen et al. (1999) Sample 1	54	33	14	100	100	4	1-6
Olsen et al. (1999) Sample 2	54	35	16	0	100	4	1-6
Pate & Pate (2016)	70	38	15	75	93	NR	NR
Puasiri et al. (2011)	237	46	NR	54	76	13	NR
Raisanen (2013)	87	42	NR	100	87	7	4-17
Roper et al. (2013) Sample 1	209	40	NR	100	100	9	NR
Roper et al. (2013) Sample 2	209	42	NR	0	100	9	NR
Small (2010)	30	44	12	100	59	5	4-17
Snowdon et al. (1994)	50	41	14	97	72	12	2-37
Svavarsdottir et al. (2000) S1	75	33	15	100	89	2	0-5
Svavarsdottir et al. (2000) S2	62	35	15	0	98	2	0-5
Thornton (2018)	38	31	15	100	84	11	0-31
Uthis (1999)	145	47	9	70	68	16	7-26
VanSolkema (1997)	65	57	NR	63	NR	35	18-58
Varner (2009)	106	27	13	94	46	4	3-5
Walsh (2004)	26	36	15	100	100	NR	1-21+