Table 2.

Comparison of the risk (odds ratio ± 95% CI) of COPD readmission within 30 days and 90 days, dependent on the LOS of the index COPD admission. Multiple logistic regression adjusted for patient sex, age, and deprivation score

	Readmission rate within 30 days	Readmission rate within 90 days
LOS ≤ 2 days (Reference)	10.4%	16.6%
LOS 3–5 days	9.4% OR: 0.87 (0.77–0.99)	17.6% OR: 1.06 (0.96–1.17)
LOS 6–9 days	9.9% OR: 0.93 (0.82–1.07)	18.1% OR: 1.09 (0.98–1.22)
LOS > 9 days	11.1% OR: 1.03 (0.91–1.17)	19.3% OR: 1.17 (1.05–1.30)