Clopidogrel was associated with a reduction in ischemic events among current smokers ( @ % vs. @ % ; HR : @ -LSB- @ % CI : @ to @ -RSB- ) , whereas no benefit over aspirin was seen in the combined group of ex-smokers/never-smoked patients ( @ % vs. @ % ; HR : @ -LSB- @ % CI : @ to @ -RSB- ; p = @ for interaction ) .