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. 2021 Dec 9;40:22. doi: 10.1186/s40101-021-00273-x

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 2 — Meta-analyses of risk factors associated with asthma in Asia. The pooled odds ratios (ORs) for each asthma-associated risk factor were computed using the random-effect meta-analysis, with 95% confidence intervals (95% CIs) also included. Results from the heterogeneity test, including the I² value and the heterogeneity p value (Het P) were also included in the figure. Publication biases were assessed based on the symmetry of funnel plots for each meta-analysis. The asterisk (*) indicates an inconclusive interpretation of the funnel plot because of the small number of studies included in the meta-analysis (n < 10)