Association of right atrial structure with incident atrial fibrillation: a longitudinal cohort cardiovascular magnetic resonance study from the Multi-Ethnic Study of Atherosclerosis (MESA)

Table 3 Association of right atrial (RA) structure and function with incident AF

RA Parameter	Unadjusted		Model 1		Model 2
RA Parameter	HR (95% CI)	P-value	HR (95% CI)	P-value	HR (95% CI)	P-value
RA maximum volume indexed	1.16 (1.05,1.28)	0.003	1.24 (1.12,1.36)	< 0.001	1.13 (1.00,1.27)	0.041
RA minimum volume indexed	1.18 (1.08,1.3)	0.001	1.19 (1.08,1.31)	< 0.001	1.12 (1.01, 1.25)	0.037
RA total EF %	0.89 (0.8,0.99)	0.03	0.95 (0.85,1.06)	0.34	0.94 (0.83, 1.07)	0.36
RA global strain %	0.88 (0.79,0.98)	0.02	1.06 (0.95,1.18)	0.32	1.05 (0.92. 1.19)	0.45
RA free-wall strain %	0.9 (0.81,1.0)	0.06	1.02 (0.92,1.14)	0.63	1.01 (0.89, 1.15)	0.82

Hazard ratios are presented per SD change in measurements, with SD noted in Table 2
Model 1 was adjusted for demographics and traditional risk factors: age, race, gender, BMI, smoking status, HDL, lipid-lowering medication, systolic blood pressure, hypertension medication, fasting glucose, alcohol use
Model 2 was additionally adjusted for LA maximum volume index, LA passive emptying fraction, LA peak longitudinal strain
CI confidence interval, LA left atrium; other abbreviations in Tables 1 and 2

ISSN: 1532-429X