Table 2.

Admissions and time spent in hospital for admissions for COPD

Metric	Pre-ACERS mean value	Post-ACERS mean value	Sample size (n)	P-value	Change	Effect size
COPD admissions (City and Hackney patients to all trusts)	1.38 per 1,000 population	1.24 per 1,000 population	7	0.13	Nonsignificant reduction
COPD admissions (City and Hackney patients to the Homerton Hospital only)	1.07 per 1,000 population	0.99 per 1,000 population	7	0.34	Nonsignificant reduction
% of COPD admissions which are 0–1 days	27%	34%	7	<0.0001	Significant increase	1.19
Average LOS for COPD admissions	6.8 days	4.5 days	7	0.07	Almost significant decrease	1.74
Total bed days for COPD	1,817 per year	1,200 per year	7	0.048	Significant decrease	2.00

Abbreviations: ACERS, Acute COPD Early Response Service; LOS, length of stay.