Implication and recommendation:
This meta-analysis suggests a strong association between risk factors (mortality and co-morbidities) with DM COVID-19 infected patients. To reduce risk of disease progression, preventive measures should be considered by DM patients.  Proper management of blood glucose level during COVID-19 pandemic might help DM patients to avoid humanistic and economic burden which may arises due to ICU admission, frequent hospital visits, hospitalization and mechanical ventilation requirement.

Conclusion

This meta-analysis of observational study showed a significant association between mortality and DM COVID-19 infected patients. Other co-morbidities especially CVD/hypertension could be a serious threat for DM COVID-19 infected patients for the higher mortality. Further long term, multinational and large sample size clinical studies warranted to justify current findings.