Table 4.

Interventions reported outcomes while including social media features from the different categories.

Study outcome	Communication, n (%)	Peer grouping, n (%)	Data sharing, n (%)	Competition, n (%)	Activity data viewing, n (%)	Online social network, n (%)	Identity representation, n (%)
Studies with positive outcome	88 (71.0)	47 (84)	40 (93)	20 (77)	40 (80)	31 (84)	34 (87)
Studies with neutral outcome	33 (26.6)	9 (16)	2 (5)	6 (23)	10 (20)	6 (16)	5 (13)
Studies with negative outcome	3 (2.4)	0 (0)	1 (2)	0 (0)	0 (0)	0 (0)	0 (0)