Table 3

Crude rates of secondary use (number of events per person per year)

	Residential care homes				Nursing homes
	Principia		Matched controls		Principia		Matched controls
Outcomes over the follow-up period	Events	Crude rate*	Events	Crude rate*	Events	Crude rate*	Events	Crude rate*
Total number of residencies	203		203		365		365
Total number of unique residents	203		166		365		263
Person-years of follow-up	145.3		139.3		182.1		189.6
Potentially avoidable emergency admissions	29	0.20	56	0.40	44	0.24	38	0.20
Emergency admissions	86	0.59	129	0.93	124	0.68	100	0.53
A&E attendances	119	0.82	185	1.33	124	0.68	131	0.69
Hospital bed days†	5.5 (15.6)	0.035 (0.115)	5.9 (12.4)	0.039 (0.107)	3.5 (8.9)	0.031 (0.094)	3.5 (10.1)	0.034 (0.120)
Outpatient attendances	303	2.09	204	1.46	350	1.92	394	2.08
Deaths out of hospital (% of all deaths)	40	74.1%	38	69.1%	127	84.1%	138	88.5%
Deaths (% of all records)	54	26.6%	55	27.1%	151	41.4%	156	42.7%

*Number of events per person per year.
†Hospital bed days are presented as mean (SD) of the absolute number of bed days (in ‘events’ column) and of hospital bed days as a proportion of the length of stay in the care home (in the ‘crude rate’ column).
A&E, Accident & Emergency.