Table 2.

Success rate in achieving its predetermined primary end point across the 3 intervention categories.

Intervention category	Studies (N=28), n (%)	Significant end pointsa, n/N (%)	RCTsb (n=23), n (%)	Significant end pointsc, n/N (%)
High intensity	7 (25)	6/7 (86)	5 (22)	4/5 (80)
Medium intensity	16 (57)	12/16 (75)	14 (61)	10/14 (71)
Low intensity	5 (18)	3/5 (60)	4 (17)	3/4 (75)

^aNumber of studies achieving statistically significant results in primary end point.

^bRCT: randomized controlled trial.

^cNumber of RCTs achieving statistically significant results in primary end point.