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Subgroup analyses of recurrent ischemic stroke. Patients without chronic kidney disease had lower risks of recurrent IS in the pioglitazone group (p for interaction = 0.023). Patients using telmisartan for hypertension control may have a lower risk of recurrent IS in the pioglitazone group (p for interaction = 0.071). CI confidence interval, SHR subdistribution hazard ratio, IS ischemic stroke. Statistical significance for interaction of subgroup analyses was set at p < 0.1
