Temporal Changes in the Quality of Acute Stroke Care in Five National Audits across Europe

Table 1

Characteristics of participating audits, 2004–2009.

	ADSR	POLKARD	SSCA	Riks-Stroke	NSSA
Number of centers^#	193	45	18	74	208
No. of patients per center per year, median (IQR)
2004	143 (75–372)	205 (160–264)	0	256 (169–435)	40 (37–40)
2005	164 (80–360)	141 (76–188)	369 (225–514)	277 (183–426)	0
2006	0	0	269 (187–501)	270 (170–418)	66 (48–79)
2007	217 (85–456)	280 (168–342)^†	339 (188–514)	261 (165–423)	0
2008	253 (79–535)	51 (33–69)^†	382 (210–578)	269 (165–399)	59 (50–60)
2009	346 (86–616)	0	297 (191–601)	268 (177–427)	0

Center participating continuously over the whole study period only; patients with missing center allocation or with missing/default year of admission were not considered; ^#number of centers referring to participating center, trusts, or departments; IQR: interquartile range; ^†no complete calendar years of documentation.