| Evidence classification method： |
Level I
Experimental study, randomized control trial (RCT)
Systematic review of RCTs
Level II
Quasi-experimental studies
Systematic review of quasi-experimental studies and RCTs
Level III
Non-experimental studies
Systematic review of some combination of RCTs, quasi-experimental studies, and non-experimental studies.
Level IV
Opinions of respected authorities and/or reports of nationally recognized expert committees or consensus panels based on scientific evidence.
Level V
Evidence obtained from literature or integrative reviews, quality improvement, program evaluation, financial evaluation, or case reports.
Opinion of nationally recognized expert(s) based on experiential evidence. |
