Effectiveness of low-dose ASA in prevention of secondary ischemic stroke, the asa study group in Taiwan

Ti Kai Lee, Kin Wei A Chan, Zei Shung Huang, Sien Kiat Ng, Ruey Tay Lin, Helen L. Po, Rey Yue Yuan, Ming Liang Lai, Tso Wen Chang, Sui Hing Yan, Jong Chyou Deng, Lu Han Liu, Kei Yee Lee, Sian King Lie, Shing Ming Sung, Han Hwa Hu

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Abstract

This randomized double-blind controlled study was carried out to investigate the effect of 100 mg acetylsalicylic acid (ASA) per day on the secondary prevention of ischemic stroke. Patients who suffered a first ischemic stroke from 13 participating hospitals were enrolled. They were independent or only partially dependent in activities of daily living and all had received brain CT for diagnosis. Eligible patients were randomly allocated to the 100 mg ASA or the nicametate citrate (a vasodilator) groups, and trial medications were started within three to six weeks after the onset of stroke. The primary end point was cerebral reinfarction, and intracranial hemorrhage was classified as an adverse event. Four hundred and sixty-six patients participated in this study; and 222 cases (136 males and 86 females) were allocated to the ASA group while 244 cases (150 males and 94 females) were assigned to the nicametate group. No significant difference in baseline characteristics between the two groups was observed. Cerebral reinfarction developed 6.3% (14/222) in the ASA group and 11.9% (29/244) in the nicametate group. According to the Cox's proportional hazards model, the estimated risk ratio (ASA group vs. nicametate group) was 0.538, with a 95% confidence interval of 0.284-1.019. The result was of borderline statistical significance. The risk for cerebral reinfarction was reduced by almost 50% among those who took 100 mg ASA versus those who took nicametate.

Original languageEnglish
Pages (from-to)215-224
Number of pages10
JournalThrombosis Research
Volume87
Issue number2
DOIs
Publication statusPublished - Jul 15 1997

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Keywords

  • Aspirin
  • Chinese
  • Clinical trials
  • Ischemic
  • Stroke
  • Stroke prevention

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Hematology

Cite this

Lee, T. K., Chan, K. W. A., Huang, Z. S., Ng, S. K., Lin, R. T., Po, H. L., Yuan, R. Y., Lai, M. L., Chang, T. W., Yan, S. H., Deng, J. C., Liu, L. H., Lee, K. Y., Lie, S. K., Sung, S. M., & Hu, H. H. (1997). Effectiveness of low-dose ASA in prevention of secondary ischemic stroke, the asa study group in Taiwan. Thrombosis Research, 87(2), 215-224. https://doi.org/10.1016/S0049-3848(97)00121-7