Thrombolysis for mild stroke

Table 1 Most commonly used definitions for mild stroke by literature

Based on baseline NIHSS	All patients with baseline NIHSS ≤ 3[6-9]
	All patients with baseline NIHSS ≤ 4[7,10]
	All patients with baseline NIHSS ≤ 5[4,11,12]
	All patients with baseline NIHSS ≤ 6[7,13]
	All patients with baseline NIHSS ≤ 9[14]
	All patients with a score 0 or 1 on every baseline NIHSS score item and normal consciousness[6,14]
Based on syndromes	All patients with a lacunar-like syndrome (presumed small vessel occlusive disease) such as pure sensory syndrome, pure motor hemiparesis, sensorimotor syndrome, ataxic hemiparesis, and dysarthria-clumsy hand syndrome[6,14]
	All patients with only motor deficits (can include dysarthria or ataxia) with or without sensory deficits. These patients can have only a combination of motor, coordination, and sensory deficits without any deficits in the spheres of language, level of consciousness, extinction or neglect, horizontal eye movements, or visual fields, deficits generally ascribed to larger territories of focal ischemia[6,14]
	All patients with baseline NIHSS in the lowest (least severe) quartile of severity (NIHSS ≤ 9), excluding all patients with aphasia, extinction, or neglect, or any points on the level-of-consciousness questions[6,14]
Based on imaging	Major stroke: A proximal cerebral artery occlusion on the CTA or MRA; if no occlusion, imaging evidence of significant parenchymal ischemia on NCCT or DWI[15]
	Minor stroke: all of the others except major stroke[15]

NIHSS: National Institutes of Health Stroke Scale; CTA: Computered tomography angiography; MRA: Magnetic resonance angiography; NCCT: Non-contrasted computered tomography; DWI: Diffusion-weighted imaging.