Findings
What do systematic reviews say? 4,815 questions · 6,211 findings · 638 reviews · Headline outcomes only
1,052 · 16.9% 441 · 7.1% 1,700 · 27.4% 1,651 · 26.6% 1,070 · 17.2% 297 · 4.8%
Ranked among the 5,000 newest matching findings; add words or filters to narrow the search.
All‐cause mortality
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
Health‐related quality of life
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
Cardiovascular mortality
1 finding from 1 review
Non‐fatal MI
1 finding from 1 review
Non‐fatal stroke
1 finding from 1 review
End‐stage renal disease
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
All‐cause mortality
It is very uncertain whether summary of findings of metformin monotherapy for adults with type 2… changes all‐cause mortality compared with thiazolidinediones (very low certainty).
1 finding from 1 review
SAEs
It is very uncertain whether summary of findings of metformin monotherapy for adults with type 2… changes serious adverse events (SAE) compared with thiazolidinediones (very low certainty).
1 finding from 1 review
Health‐related quality of life
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
Cardiovascular mortality
It is very uncertain whether summary of findings of metformin monotherapy for adults with type 2… changes cardiovascular mortality (CVM) compared with thiazolidinediones (very low certainty).
1 finding from 1 review
Non‐fatal MI
1 finding from 1 review
Serious adverse events
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
Non‐fatal stroke
1 finding from 1 review
End‐stage renal disease
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
All‐cause mortality
1 finding from 1 review
SAEs
1 finding from 1 review
Health‐related quality of life
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
Cardiovascular mortality
1 finding from 1 review
Non‐fatal MI
1 finding from 1 review
Non‐fatal stroke
1 finding from 1 review
evidence gaps · evidencegaps.com
Not clinical guidance. Data from the Cochrane Library (Summary of Findings tables and full text), PubMed and Crossref, extracted by the Evidence Gaps pipeline. Related-question groupings and the gap map key are proposals pending human validation. A review that found no studies, or no review at all, is not proof that no research exists.