Table 2.

Left atrium echocardiographic values

P-value interaction athletic status and AF status

	Athletes		Non-athletes
	AF	No AF	AF	No AF	P-value athletes vs. non-athletes	P-value AF vs. No AF	P-value interaction athletic status and AF status
LASr (%)	$27.9\pm 6.4$	$33.5\pm 4.8$	$28.7\pm 7.0$	$33.8\pm 4.9$	0.410	<0.001	0.673
LAScd (%)	$13.4\pm 4.9$	$15.4\pm 4.0$	$13.3\pm 4.0$	$15.3\pm 4.5$	0.788	<0.001	0.955
LASct (%)	$14.6\pm 4.5$	$18.1\pm 4.1$	$15.5\pm 5.8$	$18.5\pm 4.0$	0.215	<0.001	0.591
LAEF (%)	$44.3\pm 9.4$	$50.6\pm 6.8$	$44.9\pm 10.6$	$52.2\pm 6.8$	0.204	<0.001	0.546
LAVImax (mL/m2)	$52.4\pm 15.2$	$45.9\pm 10.8$	$44.3\pm 11.9$	$38.2\pm 8.0$	<0.001	<0.001	0.867
LAVImin (mL/m2)	$29.7\pm 12.3$	$22.9\pm 7.2$	$25.0\pm 10.0$	$18.3\pm 4.8$	<0.001	<0.001	0.997
LA passive emptying fraction (%)	$29.0\pm 8.6$	$29.7\pm 8.1$	$26.1\pm 9.6$	$30.2\pm 8.8$	0.247	0.020	0.090
LA active emptying fraction (%)	$25.0\pm 10.3$	$31.9\pm 8.9$	$27.8\pm 12.2$	$34.9\pm 9.1$	0.013	<0.001	0.970
LA stiffness	$0.31\pm 0.15$	$0.23\pm 0.08$	$0.34\pm 0.25$	$0.26\pm 0.09$	0.052	<0.001	0.948

Values are expressed as mean$\pm$SD. Two-way between groups analysis of variance was conducted. P-values for the main effects of athletic status and AF status as well as the interaction are presented in the table.

LA, left atrial; LAEF, left atrial ejection fraction; LAScd, Left atrial conduit strain; LASct, Left atrial contractile strain; LASr, Left atrial reservoir strain; LAVI_max, maximum left atrial volume index; LAVI_min, minimum left atrial volume index.