Table 2.

Association between clinical outcomes and length of hospital stay in the first 30 and 90 days after hospital discharge among patients with an uncomplicated acute myocardial infarction: Worcester Heart Attack Study

	≤2 days	3 days	≥4 days
	OR (95%CI)	OR (95%CI)	OR (95%CI)
30-day hospital readmission
Unadjusted	0.78 (0.50–1.22)	Reference	1.57 (1.05–2.35)
Adjusted†	0.81 (0.52–1.41)	Reference	1.39 (0.92–2.10)
30-day mortality
Unadjusted	0.92 (0.30–2.79)	Reference	1.50 (0.54–4.17)
Adjusted‡	0.93 (0.29–2.98)	Reference	0.98 (0.34–2.79)
90-day mortality
Unadjusted	0.74 (0.31–1.80)	Reference	1.87 (0.88–4.01)
Adjusted§	0.89 (0.36–2.20)	Reference	1.19 (0.54–2.61)

OR: odds ratio, CI: confidence interval

Note: Analyses for post-discharge mortality were conducted in a total sample of 1,501 patients discharged from all 11 metropolitan Worcester hospitals, while the analyses for hospital readmission were conducted in a subsample of 1,364 patients in whom readmission data were available from 3 city of Worcester hospitals.

^†Adjusted for age and comorbid chronic kidney disease

^‡Adjusted for age and race

^§Adjusted for age and receipt of a percutaneous coronary intervention