Table 3.

Participant characteristics

	Groups	Number of subjects	Total number of subjects lost	Age	Sex (% of female)
Evgeniadis et al. 2008	Intervention¶	24	9	68.6	70%
	Control	24	4	69.4	87%
Fung et al. 2012	Intervention	27	0	68	58%
	Control	23	0	68	42%
Harmer et al. 2009	Intervention	53	4	67.8	57%
	Control	49	2	68.7	57%
Johnson et al. 2010	Intervention	11	3	67	25%
	Control	10	2	68.5	50%
Kauppila et al. 2010	Intervention	44	8	70.7	76%
	Control	42	3	70.6	79%
Kramer et al. 2003	Intervention A	80	15	68.2	59%
	Intervention B	80	22	68.6	55%
Levine et al. 2013	Intervention	35	7	65.1	76%
	Control	35	10	68.1	62%
Liao et al. 2013	Intervention	65	7	71.4	79%
	Control	65	10	72.9	67%
Liebs et al. 2012	Intervention A	87	21	68.5	70%
	Intervention B	98	29	70.9	73%
Madsen et al. 2013	Intervention	40	4	69.9	47%
	Control	40	8	66.2	50%
Mockford et al. 2008	Intervention	75	4	69.4	65%
	Control	75	3	70.9	58%
Moffet et al. 2004	Intervention	38	0	66.7	56%
	Control	39	8	68.7	63%
Petterson et al. 2009	Intervention‡	41	0	65.4	58%
	Control	41	0	65.9	66%
Piva et al. 2010	Intervention	21	3	70	72%
	Control	22	5	67	72%
Rajan et al. 2004	Intervention	56	0	69	64%
	Control	60	0	68	61%
Russel et al. 2011	Intervention	31	1	66.2	Unknown
	Control	34	1	69.6	Unknown
Tousignant et al. 2011	Intervention	24	3	66	Unknown
	Control	24	4	66	Unknown
Valtonen et al. 2010	Intervention	26	1	66.2	Unknown
	Control	24	3	65.7	Unknown
Valtonen et al. 2011	Intervention	26	1	65.8	Unknown
	Control	24	7	66.4	Unknown

^¶Study included a second experimental group that is not included in the current review.

^‡Study included a between intervention comparison that is not included in the current review.