Table 9.

The univariate and multivariate regression model results for left atrial strain.

Variables	LALSr				LALScd				LALSct
	R2	p Value	Beta	p Value	R2	p Value	Beta	p Value	R2	p Value	Beta	p Value
Age	−0.21	0.008			−0.21	0.009
BSA	−0.21	0.008			−0.19	0.018
Sex	−0.2	0.011							−0.18	0.019
LV mass	−0.27	0.001			−0.27	0.001	−0.86	0.002
DDLV	−0.24	0.003			−0.2	0.009
EDV	−0.24	0.002			−0.25	0.002
RV basal	−0.25	0.002			−0.2	0.01
RVDA	−0.19	0.016							0.31	0.031
A Vel	0.17	0.026			0.05				0.27	0.001	0.113	0.002
LA Vol	−0.3	<0.0001	−0.465	<0.0005	−0.25	0.002			−0.12
TDV A septal									0.24	0.003
E/A Ratio									−0.18	0.018

LALSr: Left atrial longitudinal strain reservoir phase, LALScd: Left atrial longitudinal strain conduct phase, LALSct: Left atrial longitudinal strain contraction phase, R²: Determination coefficient, BSA: body surface area, LV: left ventricle, DDLV: end diastolic diameter of left ventricle, EDV: end diastolic volume, RV: right ventricle, RVDA: right ventricle diastolic area, LA: left atrial, TDV: tissue doppler velocity. Variables that reached p-values < 0.01 in the univariate model and did not show collinearity with other variables (VIF < 5) were included in the multivariate model. In cases of collinearity, the variable with the highest correlation coefficient was included in the multivariate model. If a variable included in the multivariate model did not reach statistical significance, it was excluded by backward steps. In the LALSr multivariable regression model, r = 0.299, R² = 0.089 and corrected R² = 0.083 p < 0.0005. In the LALScd multivariable regression model, r = 0.270, R² = 0.073 and corrected R² = 0.066 p < 0.002. In the LALScp multivariable regression model, r = 0.272, R² = 0.074 and corrected R² = 0.067, p < 0.002. Bold values indicate p-values < 0.01.