Symptoms and outcomes depend on the type of type of stroke an individual suffers. There are four main kinds: ischemic stroke-thrombotic, ischemic stroke-embolic, hemorragic stroke-intracerebral, and hemorragic stroke-subarachnoid. Also the length of time between the stroke and the treatment administered can make a difference, for example Tissue Plasminogen Activator is a thrombolytic drug and can be given within 3 hrs to break blood clots and restore blood flow. Lastly, there is research that indicates a difference in signs, symptoms, incidence, prevalence, mortality, and outcomes between males and females.