To compare secondary medical outcomes among patients with similar conditional probability of timely acute reperfusion therapy, a cohort of timely acute reperfusion therapy recipients and non-recipients matched by propensity score will be also defined. For this purpose, an algorithm will be used to match each timely acute reperfusion therapy recipient to a single non-recipient who have the nearest propensity score within one digit. If this cannot not be done, that timely acute reperfusion therapy recipient will be excluded from the propensity-matched analysis. The propensity-matched cohort will be evaluated for significant residual imbalances in baseline characteristics. Then logistic regression will be used to estimate the odds ratio for each secondary medical outcomes associated with the receipt of timely acute reperfusion therapy among propensity score-matched patients.