Table 2.

Categorization of interventions by effect on health outcomes by Morrison et al [64].

Effectiveness	Criteria
High effective	The intervention led to statistically significant improvement on the majority of outcome measures.
	The intervention was more effective or as effective as comparison groups.
	The intervention was more effective than control groups without an intervention or waiting lists.
Low effective	The intervention led to statistically significant improvement on the minority of outcome measures.
	The intervention was as effective or less effective than comparison groups.
	The intervention was more effective than control groups without an intervention or waiting lists.
Ineffective	The intervention led to no statistically significant improvements on any of the outcome measures.
	The intervention was no more effective than control groups without an intervention or waiting lists.