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Practicing Meta-Analytics with Rectification

Author

Listed:
  • Ramalingam Shanmugam

    (School of Health Administration, Texas State University, San Marcos, TX 78666, USA)

  • Karan P. Singh

    (Department of Epidemiology and Biostatistics, The University of Texas at Tyler Health Science Center, School of Medicine, Tyler, TX 75708, USA)

Abstract

This article demonstrates the necessity of assessing homogeneity in meta-analyses using the Higgins method. The researchers realize the importance of assessing homogeneity in meta-analytic work. However, a significant issue with the Higgins method has been identified. In this article, we explain the nature of this problem and propose solutions to address it. Our narrative in this article is to point out the problem, analyze it, and present it well. A prerequisite to check the consistency of findings in comparable studies in meta-analyses is that the studies should be homogeneous, not heterogeneous. The Higgins I 2 score, a version of the Cochran Q value, is commonly used to assess heterogeneity. The Higgins score is an improvement in the Q value. However, there is a problem with Higgins score statistically. The Higgins score is supposed to follow a Chi-squared distribution, but it does not do so because the Chi-squared distribution becomes invalid once the Q score is less than the degrees of freedom. This problem was recently rectified using an alternative method ( S 2 score). Using this method, we examined 14 published articles representing 133 datasets and observed that many studies declared homogeneous by the Higgins method were, in fact, heterogeneous. This article urges the research community to be cautious in making inferences using the Higgins method.

Suggested Citation

  • Ramalingam Shanmugam & Karan P. Singh, 2025. "Practicing Meta-Analytics with Rectification," Publications, MDPI, vol. 13(1), pages 1-12, January.
  • Handle: RePEc:gam:jpubli:v:13:y:2025:i:1:p:2-:d:1558867
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    References listed on IDEAS

    as
    1. Alibrandi, Angela & Gitto, Lara & Limosani, Michele & Mustica, Paolo Fabrizio, 2023. "Patient satisfaction and quality of hospital care," Evaluation and Program Planning, Elsevier, vol. 97(C).
    2. Frédéric Dutheil & Tharwa Oueslati & Louis Delamarre & Joris Castanon & Caroline Maurin & Frédéric Chiambaretta & Julien S. Baker & Ukadike C. Ugbolue & Marek Zak & Ines Lakbar & Bruno Pereira & Valen, 2023. "Myopia and Near Work: A Systematic Review and Meta-Analysis," IJERPH, MDPI, vol. 20(1), pages 1-22, January.
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