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Introduction: In real world practice, patients with minor stroke symptoms are still treated with thrombolytic therapy and majority of them recover with favorable outcomes at 90 days, but there is room to identify avenues to further enhance their outcomes. We aimed to investigate the risk factors associated with the unfavorable outcome at 90 days after thrombolysis for acute minor ischemic stroke (AMIS).Methods: 152 consecutive patients presented with AMIS (NIHSS ≤3) and received intravenous alteplase between December 2012 and February 2017. Baseline clinic-demographic, characteristics and laboratory tests were recorded. Unfavorable outcome was defined as modified Rankin Scale (mRS) of 2-6 at 90 days. Univariate analysis followed by multivariate analysis was used to identify risk factors for unfavorable outcome. A receiver operating characteristic curve was used to evaluate the predictive value.Results: 113 out of 152 patients (74%) were included in the final analysis, age 59 (53-67), 72.6% men. 32 patients (28.3%) experienced unfavorable outcomes. After adjusting for covariates, only serum glucose level on admission remained an independent factor for unfavorable outcome (OR 1.43, 95% CI: 1.10-2.72, p=0.014), with a 0.617 predictive value for the unfavorable outcome.Conclusions: About 28% of patients with AMIS in this cohort had an unfavorable outcome at 3 months after thrombolysis. Addressing higher serum glucose level on admission may be a viable therapeutic strategy to improve prognoses in these patients.