| 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 |
[6] Perry SH, et.al. Implementing the Jadelle implant for women living with HIV in a resource-limited setting: concerns for drug interationcs leading to unintended pregnancies. AIDS. 2014; 28(5):791-793.