Table 3

Aneurysmal SAH, non-traumatic SAH hospitalisations before and during the pandemic

	Immediately before and during the pandemic					1 year before and during the pandemic
	N	n1	n2	Relative change % (95% CI)	P value	N	n1	n2	Relative change % (95% CI)	P value
Aneurysmal SAH	56	834	626	−24.9 (−28.0 to −22.1)	<0.0001	37	435	370	−14.9 (−18.6 to −11.9)	0.022
Non-traumatic SAH*	85	1451	1094	−24.6 (−26.9 to −22.5)	<0.0001	53	744	628	−15.6 (−18.4 to −13.1)	0.002

n1 immediately before the pandemic is based on 3-month data from December 2019 to February 2020. n1 1 year before is based on 3-month data from March 2019 to May 2019. n2 is based on 3-month control data during the COVID-19 from March 2020 to May 2020 for both analyses.
P value is from the Poisson means test.
*Non-traumatic SAH include aneurysms and perimesencephalic SAH.
n, number of admissions; N, number of hospitals; SAH, subarachnoid haemorrhage.