The impact of a physician-staffed helicopter on outcome in patients admitted to a stroke unit: a prospective observational study

Table 4 Degree of disability at 3 months defined by the modified Rankin Scale in patients admitted to a stroke unit and who received thrombolysis

	Number of persons under observation in each group (GEMS/HEMS)	GEMS, mean (SD)	HEMS, mean (SD)	Unadjusted mean difference (95% CI)	P value	Adjusted^a mean difference (95% CI)	P value
Modified Rankin Scale after 3 months
Patients who underwent thrombolysis (n = 368)	309/57	2.21 (2.07)	2.09 (2.03)	−0.12 (−0.70; 0.46)	0.69	−0.20 (−0.74; 0.33)	0.46
Modified Rankin Scale after 3 months
Directly referred patients who underwent thrombolysis (n = 310)	262/54	2.27 (2.10)	2.17 (2.05)	−0.10 (−0.71; 0.51)	0.75	−0.19 (−0.75; 0.38)	0.52

GEMS ground emergency medical services, HEMS helicopter emergency medical services, NIHSS National Institute of Health Stroke Scale. Co-morbidity was defined as having at least one of the following conditions: diabetes, atrial fibrillation, hypertension, previous myocardial infarction, previous stroke
^aAdjusted for age (quadratic), sex (male/female), co-morbidity (yes/no) and NIHSS (continuous)

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