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. 2009 Oct 1;9(23):1–40.

Table 4: Quality of Evidence of Included Studies*.

Study Design Level of
Evidence
Number of Eligible Studies
Any
Multidisciplinary
Team
At least a
Nurse,
Dietician, and
Physician
At least a
Pharmacist and
Primary Care
Physician
Large RCT, systematic review of RCTs 1 31 5 3
Large RCT unpublished but reported to
an international scientific meeting
1(g) 0 0 0
Small RCT 2 0 0 0
Small RCT unpublished but reported to
an international scientific meeting
2(g) 0 0 0
Non-RCT with contemporaneous controls 3a 0 0 0
Non-RCT with historical controls 3b 0 0 0
Non-RCT presented at international conference 3(g) 0 0 0
Surveillance (database or register) 4a 0 0 0
Case series (multisite) 4b 0 0 0
Case series (single site) 4c 0 0 0
Retrospective review, modeling 4d 0 0 0
Case series presented at international conference 4(g) 0 0 0

For each included study, levels of evidence were assigned according to a ranking system based on a hierarchy proposed by Goodman. (19) An additional designation “g” was added for preliminary reports of studies that have been presented at international scientific meetings. Non-RCT, clinical trial that is not randomized, e.g. a cohort study; RCT, randomized controlled trial.