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. 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
No. of Patients No. of Events Person-Years Event Ratea No. of Patients No. of Events Person-Years Event Ratea
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.

a

Calculated as the number of events per person-year.