# Comment on "Effectiveness and safety of stem cell therapy for diabetic foot: a meta-analysis update"

## TL;DR

This comment highlights methodological issues in a meta-analysis on stem cell therapy for diabetic foot.

## Contribution

The paper identifies specific flaws in the meta-analysis methodology and reporting.

## Key findings

- The textual report conflicts with the forest plot results due to insufficient knowledge of RevMan.
- The analysis requires correction for 'zero event' cases in the summary.
- Improvements in the visual presentation of forest plots and registration are recommended.

## Abstract

In the study published by Sun et al., a systematic review and meta-analysis illustrated the advantageous of stem cell therapy in diabetic foot and can improve the quality of life of patients. Nevertheless, the authors had a lack of knowledge regarding the methodology of the meta-analysis, which had four main aspects: (1) The textual report is inconsistent with the forest plot results, i.e., the authors have insufficient knowledge of RevMan. (2) The "zero event" needs to be corrected for summary analysis. (3) Lack of aesthetics in the forest plots. (4) Registration is recommended for systematic reviews and meta-analyses.