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There are some reports on successful adjunct intrathecal dexamethasone and isoniazid (IDI) treatment strategies for TBM, however, there is equivocal evidence on their efficacy and safety.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>A comprehensive search of English and Chinese databases was conducted from inception to February 2024. A meta-analysis was performed on randomized controlled trials (RCTs) estimating the effects of adjunct IDI on conventional anti-TB (C anti-TB) treatments or C anti-TB alone. Efficacy, adverse reaction\u00a0rate, cerebrospinal fluid (CSF) leukocytes, and CSF protein were used as primary outcome indicators. CSF glucose, CSF chlorides, CSF pressure, recovery time for laboratory indicators and recovery time for clinical symptoms were used as secondary outcome indicators.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>A total of 17 studies involving 1360 (IDI group vs. C anti-TB group: 392 vs. 372; higher-dose IDI group vs. lower-dose IDI group: 319 vs. 277) patients were included in our analysis. Efficacy was significantly higher (RR 1.3, 95% CI 1.2-1.4, <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001) and adverse reaction rate was significantly lower in the IDI groups (RR 0.59, 95% CI 0.37-0.92, <jats:italic>P<\/jats:italic>\u2009=\u20090.021). Furthermore, CSF leukocytes (WMD\u2009-\u200929.33, 95% CI [-\u200940.64 to-18.02], <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001) and CSF protein (WMD -\u00a00.79, 95%CI [-0.96 to-0.61], <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001) were significantly lower in the IDI groups. Recovery time indicators were all shorter in the IDI groups, fever (SMD -\u00a02.45, 95% CI [-3.55 to-1.35], <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001), coma (SMD-3.75, 95% CI [-4.33 to-3.17], <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001), and headache (SMD\u2009\u00a0-\u20093.06,\u00a095% CI [-\u20094.05 to-2.07], <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001), respectively. Higher-dose IDI was more effective than lower-dose IDI (RR 1.23, 95% CI 1.14-1.33, <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001), with no significant difference in adverse reaction rate\u00a0between the two (RR 0.82, 95%CI 0.43\u20131.56, <jats:italic>P<\/jats:italic>\u2009=\u20090.544).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>Adjunct IDI with C anti-TB can enhance therapeutic outcomes and reduce adverse reaction rate\u00a0in adult TBM patients, with higher-dose IDI showing superior efficacy. These findings highlight the potential of IDI as an adjunctive therapy in TBM management. However, more high-quality RCTs from more regions should be conducted to support our results.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Trial registration<\/jats:title>\n                <jats:p>Retrospectively registered in PROSPERO\u00a0<jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/www.crd.york.ac.uk\/prospero\/display_record.php?ID=CRD42023388860\">https:\/\/www.crd.york.ac.uk\/prospero\/display_record.php?ID=CRD42023388860<\/jats:ext-link>.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12883-024-03701-4","type":"journal-article","created":{"date-parts":[[2024,6,10]],"date-time":"2024-06-10T07:02:13Z","timestamp":1718002933000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Efficacy and safety of intrathecal dexamethasone combined with isoniazid in the treatment of tuberculous meningitis: a meta-analysis"],"prefix":"10.1186","volume":"24","author":[{"given":"Yan","family":"Gao","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinwen","family":"Su","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuxiang","family":"Ma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yunliang","family":"Sun","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiyong","family":"Cui","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xianhe","family":"Jin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuxi","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhi","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,6,10]]},"reference":[{"issue":"7","key":"3701_CR1","doi-asserted-by":"publisher","first-page":"3482","DOI":"10.1007\/s00415-022-11052-8","volume":"269","author":"A Navarro-Flores","year":"2022","unstructured":"Navarro-Flores A, Fernandez-Chinguel JE, Pacheco-Barrios N, Soriano-Moreno DR, Pacheco-Barrios K. 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