Nuannuan Cai: Pulmonary and Critical Care Medicine, Hainan Provincial People's Hospital, Haikou, Hainan, China.
Weiyan Luo: Pulmonary and Critical Care Medicine, Hainan Provincial People's Hospital, Haikou, Hainan, China.
Lili Ding: Pulmonary and Critical Care Medicine, Hainan Provincial People's Hospital, Haikou, Hainan, China.
Lijin Chen: Pulmonary and Critical Care Medicine, Hainan Provincial People's Hospital, Haikou, Hainan, China.
Yuanjiang Huang: Infectious and Tropical Disease Dept (Tuberculosis), The Second Affiliated Hospital of Hainan Medical College, Haikou, Hainan, China. ORCID
PURPOSE: obesity is a strong risk factor for many diseases, with controversy regarding the cause(s) of tuberculosis (TB) reflected by contradictory findings. Therefore, a larger sample population is required to determine the relationship between obesity and TB, which may further inform treatment. METHODS: obesity-related indicators and TB mutation data were obtained from a genome-wide association study database, while representative instrumental variables (IVs) were obtained by screening and merging. Causal relationships between exposure factors and outcomes were determined using two-sample Mendelian randomization (MR) analysis. Three tests were used to determine the representativeness and stability of the IVs, supported by sensitivity analysis. RESULTS: Initially, 191 single nucleotide polymorphisms were designated as IVs by screening, followed by two-sample MR analysis, which revealed the causal relationship between waist circumference [odds ratio (OR): 2.13 (95% confidence interval (CI): 1.19-3.80); p = 0.011] and TB. Sensitivity analysis verified the credibility of the IVs, none of which were heterogeneous or horizontally pleiotropic. CONCLUSION: The present study determined the causal effect between waist circumference and TB by two-sample MR analysis and found both to be likely to be potential risk factors.
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