"Meta-analysis is a research process used to systematically synthesise or merge the findings of single, independent studies, using statistical methods to calculate an overall or ‘absolute’ effect" (Shorten, 2013).
Page, M. J., McKenzie, J. E., Bossuyt, P. M., Boutron, I., Hoffmann, T. C., Mulrow, C. D., ... & Moher, D. (2021). The PRISMA 2020 statement: an updated guideline for reporting systematic reviews. International Journal of Surgery, 88, 105906. Full Text
Cleophas, T., & Zwinderman, A. (2017). Modern Meta-Analysis: Review and Update of Methodologies: Springer Cham. Catalogue Link
Abou Ghayda, R., Lee, K. H., Han, Y. J., Ryu, S., Hong, S. H., Yoon, S., ... & Shin, J. I. (2022). The global case fatality rate of coronavirus disease 2019 by continents and national income: A meta‐analysis. Journal of Medical Virology, 94(6), 2402-2413. Full Text
References
Shorten A, Shorten B, What is meta-analysis? Evidence-Based Nursing 2013;16:3-4. Full Text