| Level I | Good quality evidence |
Systematic review of RCTs with consistent findings High quality individual RCT |
| Level II |
Limited quality patient orientated evidence |
Systematic review of lower quality studies or studies with inconsistent findings Low quality clinical trial Cohort studies Case-control studies |
| Level III | Other |
Consensus guidelines, extrapolations from bench research, usual practice, opinion, disease-oriented evidence (intermediate or physiologic outcomes only), or case series |
[16] Physical health care monitoring (mental illnesses): Tosh G, Clifton AV, Xia J, White MM. Physical health care monitoring for people with serious mental illness. Cochrane Database Syst Rev. 2014 Jan 17;(1):CD008298. https://www.ncbi.nlm.nih.gov/pubmed/24442580