The obesity paradox exists in Asia: A systematic review and meta-analysis of body mass index effects on clinical outcomes following percutaneous coronary intervention in Asia.

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Cardiovascular diseases (CVDs) are major contributors to illness and death globally. Body mass index (BMI) is a well-established prognostic factor on cardiovascular risk outcome. Numerous investigations have provided evidence for the existence of the obesity paradox after percutaneous coronary intervention (PCI). However, the association between BMI and the results following PCI has not been extensively investigated in Asian populations. The research aims to fill the current void in understanding by investigating the association between BMI and clinical consequences following PCI, with a particular focus on Asian individuals. A systematic search was conducted through PubMed, ScienceDirect, and Cochrane Library to identify studies examining the effect of BMI on clinical outcome after PCI in Asia. R Studio 4.3.2 software was used to carry out the analysis of the data. A total of 182,110 patients who had gone through PCI were found in the 5 included cohorts. A meta-analysis conducted on the subjects revealed that patients who were overweight (odds ratio [OR] = 0.60, 95% confidence interval [CI] [0.57, 0.63], P < 0.0001) had a lower risk of all-cause mortality compared to individuals with a healthy weight and patients with obesity (OR = 0.65, 95% CI [0.41, 1.05], P = 0.006) had a lower risk of all-cause mortality than healthy weight individuals. The study also found that overweight patients (OR = 0.60, 95% CI [0.39, 0.91], P = 0.02) had a lower risk of cardiac mortality. In addition, obese patients (OR = 0.41, 95% CI [0.19, 0.88], P = 0.02) had a lower risk of noncardiac mortality. However, the study found that there were no differences in major adverse cardiovascular event, myocardial infarction, and bleeding between all patient groups. This meta-analysis supports the presence of an obesity paradox after PCI in Asian populations. The obesity paradox was evident in all-cause mortality, cardiac mortality, and noncardiac mortality.