Table 6.

Multivariable Cox Regression Models Assessing the Relationship Between RA Reverse Remodeling (Δ RA Reservoir strain) and Postoperative Atrial Arrhythmias.

	HR (95%CI) for Δ RA Reservoir strain modeled as continuous variable
	Model A	Model B	Model C	Model D	Model E	Model F
aHR	0.93 (0.87–0.99)	0.89 (0.86–0.93)	0.93 (0.87–0.99)	0.90 (0.87–0.93)	0.91 (0.85–0.97)	0.94 (0.91–0.97)
	HR (95%CI) for Δ RA Reservoir strain modeled as binary variable (>15% vs ≤ 15%)
	Model A	Model B	Model C	Model D	Model E	Model F
aHR	0.79 (0.64–0.83)	0.74 (0.61–0.69)	0.81 (0.68–0.95)	0.75 (0.69–0.81)	0.77 (0.71–0.83)	0.78 (0.72–0.84)

Abbreviations: RA: right atrium; aHR: adjusted hazard ratio; CI: confidence interval.

Footnote: Adjusted signifies HR adjusted for demographic indices (age, sex), surgical history (age at time of TOF repair, transannular patch repair, prior systemic to pulmonary shunt, and PVR prior to baseline), preoperative right heart indices (RA volume, RA pressure, RV global longitudinal strain, moderate tricuspid regurgitation, RV systolic pressure, pulmonary valve gradient), preoperative left heart indices (LA volume, LA reservoir strain, LV global longitudinal strain), and comorbidities (hypertension, diabetes, coronary artery disease).

Model A: Analysis restricted patients with history of preoperative atrial arrhythmias (n = 112).

Model B: Analysis restricted to patients without history of preoperative atrial arrhythmias (n = 299).

Model C: Analysis restricted to patients with ≥moderate tricuspid prior to PVR (n = 110).

Model D: Analysis restricted to patients with <moderate tricuspid prior to PVR (n = 301).

Model E: Analysis restricted to patients with complete echocardiographic and cardiac MRI data (n = 331).

Model E: Analysis restricted to patients without atrial arrhythmias within the first year postoperatively (n = 397).