. Author manuscript; available in PMC: 2019 Jan 29.

Published in final edited form as: JAMA. 2018 May 22;319(20):2116–2126. doi: 10.1001/jama.2018.6024

Table 4.

Atrial Fibrillation–Related Health Utilization After Cardiac Surgery in Propensity Score–Matched Patients

Outcome	No LAAO				LAAO				Absolute Rate Difference (95% CI)^a	Incident Rate Ratio (95% CI)	P Value
Outcome	No. of Patients	No. of Events	Person-Years	Event Rate^a	No. of Patients	No. of Events	Person-Years	Event Rate^a	Absolute Rate Difference (95% CI)^a	Incident Rate Ratio (95% CI)	P Value
AF-Related Outpatient Visits
Overall	4295	79951	7792	10.26	4295	96 676	8083	11.96	1.70 (1.60–1.80)	1.17 (1.10–1.24)	<.001
AF at baseline	3219	75 825	5782	13.11	3219	90 927	6171	14.74	1.62 (1.49–1.76)	1.12 (1.06–1.19)	<.001
No AF at baseline	1076	4126	2010	2.05	1076	5749	1912	3.01	0.95 (0.85–1.05)	1.46 (1.10–1.96)	.01
AF-Related Hospitalization
Overall	4295	2473	7792	0.32	4295	2891	8083	0.36	0.04 (0.02–0.06)	1.13 (1.05–1.21)	.002
AF at baseline	3219	2360	5782	0.41	3219	2738	6171	0.44	0.04 (0.01–0.06)	1.09 (1.01–1.17)	.03
No AF at baseline	1076	113	2010	0.06	1076	153	1912	0.08	0.02 (0.01–0.04)	1.42 (1.01–2.00)	.04

Abbreviations: AF, atrial fibrillation; LAAO, surgical occlusion of the left atrial appendage.

Calculated as the number of events per person-year.