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. 2019 Feb 19;19(2):1–86.

Table A5:

GRADE Evidence Profile for Non-randomized Studies Investigating the Effect of Patient Adherence on Outcomes, Quality of Life, and Adverse Effects

No. of Studies (Design) Risk of Bias Inconsistency Indirectness Imprecision Publication Bias Upgrade Considerations Quality
Recurrence rate
2 observational29,31 No serious limitations No serious limitations No serious limitations No serious limitations Not detected No serious limitations ⊕⊕ Low
Quality of life
1 observational30 No serious limitations No serious limitations Serious limitationsa No serious limitations Not detected No serious limitations ⊕ Very low
Adverse effects
1 observational30 No serious limitations No serious limitations Serious limitationsa No serious limitations Not detected No serious limitations ⊕ Very low
a

Population was similar but not identical to those under consideration.

Note: Absence of randomization and control for confounding, an inherent limitation of the observational studies, is factored in the last column when we graded the quality.