Table 2: The number of critical care admissions and unique individuals admitted to critical care recorded in each data source.

Data source	Admissions	Patients
Critical care admissions unique to the ICNARC data	1,349 (1%)	1,325 (1%)
Common, integrated admissions recorded in both ICNARC and CCDS	84,952 (93%)	71,214 (94%)
Critical care admissions unique to the CCDS administrative data	5,281 (6%)	4,893 (6%)
	Total admissions 91,582	*Total unique individuals = 76,019

^*Total unique individuals: Some patients have multiple critical care admissions; a unique individual may have more than one admission recorded in each flagged group.