'Smoker's paradox' in young patients with acute myocardial infarction

Kang Yin Chen, Seung Woon Rha, Yong Jian Li, Zhe Jin, Yoshiyasu Minami, Ji Young Park, Kanhaiya L. Poddar, Sureshkumar Ramasamy, Lin Wang, Guang Ping Li, Cheol Ung Choi, Dong Joo Oh, Myung Ho Jeong, Myung Ho Jeong, Young Jo Kim, Chong Jin Kim, Myeong Chan Cho, Young Keun Ahn, Jong Hyun Kim, Shung Chull ChaeSeung Ho Hur, In Whan Seong, Taek Jong Hong, Dong Hoon Choi, Jei Keon Chae, Jae Young Rhew, Doo Il Kim, In Ho Chae, Jung Han Yoon, Bon Kwon Koo, Byung Ok Kim, Myoung Yong Lee, Kee Sik Kim, Jin Yong Hwang, Seok Kyu Oh, Nae Hee Lee, Kyoung Tae Jeong, Seung Jea Tahk, Jang Ho Bae, Keum Soo Park, Kyoo Rok Han, Tae Hoon Ahn, Moo Hyun Kim, Ju Young Yang, Chong Yun Rhim, Hyeon Cheol Gwon, Seong Wook Park, Young Youp Koh, Seung Jae Joo, Soo Joong Kim, Dong Kyu Jin, Jin Man Cho, Jeong Gwan Cho, Wook Sung Chung, Yang Soo Jang, Ki Bae Seung, Seung Park Jung

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Abstract

Of the patients suffering from acute myocardial infarction (AMI), smokers are younger than non-smokers, which may be a major confounding factor causing 'smoker's paradox'. Therefore, in the present study we evaluated the 'smoker's paradox' in young patients with AMI. In all, 1218 young AMI patients (≤ 45 years of age), comprising 990 smokers and 228 non-smokers, were enrolled in the present study. In-hospital and 8 months clinical outcomes were compared between the smokers and non-smokers. Baseline clinical characteristics showed that smokers were more likely to be male (97.9% vs 72.4%; P < 0.001) and had a higher rate of ST-segment elevation myocardial infarction (71.3% vs 59.5%; P = 0.001) than non-smokers. Clinical outcomes showed that smokers had lower rates of in-hospital cardiac death (0.8% vs 3.5%; P = 0.004), total death (0.8% vs 3.5%; P = 0.004) and 8 months cardiac death (1.1% vs 3.9%; P = 0.006) and total death (1.3% vs 4.4%; P = 0.005) than non-smokers. Multivariable logistic analysis showed that current smoking was an independent protective predictor of 8 months cardiac death (odds ratio (OR) 0.25; 95% confidence interval (CI) 0.07-0.92; P = 0.037) and total death (OR 0.26; 95% CI 0.09-0.82; P = 0.021). Subgroup analysis in patients who underwent percutaneous coronary intervention after AMI showed that current smoking was an independent protective predictor of 8 months total major adverse cardiac events (OR 0.47; 95% CI 0.23-0.97; P = 0.041). Current smoking seems to be associated with better clinical outcomes in young patients with AMI, suggesting the existence of the 'smoker's paradox' in this particular subset of patients.

Original languageEnglish
Pages (from-to)630-635
Number of pages6
JournalClinical and Experimental Pharmacology and Physiology
Volume39
Issue number7
DOIs
Publication statusPublished - 2012 Jun 27

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All Science Journal Classification (ASJC) codes

  • Physiology
  • Pharmacology
  • Physiology (medical)

Cite this

Chen, K. Y., Rha, S. W., Li, Y. J., Jin, Z., Minami, Y., Park, J. Y., Poddar, K. L., Ramasamy, S., Wang, L., Li, G. P., Choi, C. U., Oh, D. J., Jeong, M. H., Jeong, M. H., Kim, Y. J., Kim, C. J., Cho, M. C., Ahn, Y. K., Kim, J. H., ... Jung, S. P. (2012). 'Smoker's paradox' in young patients with acute myocardial infarction. Clinical and Experimental Pharmacology and Physiology, 39(7), 630-635. https://doi.org/10.1111/j.1440-1681.2012.05721.x