Practicing Meta-Analytics with Rectification
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...
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MDPI AG
2025-01-01
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| author | Ramalingam Shanmugam Karan P. Singh |
| author_facet | Ramalingam Shanmugam Karan P. Singh |
| author_sort | Ramalingam Shanmugam |
| collection | DOAJ |
| description | 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 <inline-formula><math display="inline"><semantics><mrow><msup><mrow><mi>I</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula> 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 (<inline-formula><math display="inline"><semantics><mrow><msup><mrow><mi>S</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula> 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. |
| format | Article |
| id | doaj-art-2fcdb8e2f0bb4faa85b397faf47df4b6 |
| institution | OA Journals |
| issn | 2304-6775 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-2fcdb8e2f0bb4faa85b397faf47df4b62025-08-20T01:48:58ZengMDPI AGPublications2304-67752025-01-01131210.3390/publications13010002Practicing Meta-Analytics with RectificationRamalingam Shanmugam0Karan P. Singh1School of Health Administration, Texas State University, San Marcos, TX 78666, USADepartment of Epidemiology and Biostatistics, The University of Texas at Tyler Health Science Center, School of Medicine, Tyler, TX 75708, USAThis 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 <inline-formula><math display="inline"><semantics><mrow><msup><mrow><mi>I</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula> 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 (<inline-formula><math display="inline"><semantics><mrow><msup><mrow><mi>S</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></semantics></math></inline-formula> 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.https://www.mdpi.com/2304-6775/13/1/2homogeneityCochran’s Q score<i>H</i><sup>2</sup> scoreHiggin <i>I</i><sup>2</sup> score<i>S</i><sup>2</sup> scoresystematic reviews |
| spellingShingle | Ramalingam Shanmugam Karan P. Singh Practicing Meta-Analytics with Rectification Publications homogeneity Cochran’s Q score <i>H</i><sup>2</sup> score Higgin <i>I</i><sup>2</sup> score <i>S</i><sup>2</sup> score systematic reviews |
| title | Practicing Meta-Analytics with Rectification |
| title_full | Practicing Meta-Analytics with Rectification |
| title_fullStr | Practicing Meta-Analytics with Rectification |
| title_full_unstemmed | Practicing Meta-Analytics with Rectification |
| title_short | Practicing Meta-Analytics with Rectification |
| title_sort | practicing meta analytics with rectification |
| topic | homogeneity Cochran’s Q score <i>H</i><sup>2</sup> score Higgin <i>I</i><sup>2</sup> score <i>S</i><sup>2</sup> score systematic reviews |
| url | https://www.mdpi.com/2304-6775/13/1/2 |
| work_keys_str_mv | AT ramalingamshanmugam practicingmetaanalyticswithrectification AT karanpsingh practicingmetaanalyticswithrectification |