Table 3. Univariate analysis showing the association between F1+2 plasma level in AF and independent variables age, BMI and PAF duration.

*a and b – estimated parameters of the regression equation; ** - values of the correlation coefficient R; *** - value of the coefficient of determination R2 (as an overall measure of model goodness-of-fits) for variable F1+2)

Xj	a* p-value	B* p-value	R**	R2 ***
Age (years)	260,59 0,05	0,53 0,67	0,06	0,001
BMI (kg/m2)	259,42 0,05	1,39 0,75	0,05	0,002
PAF duration (hours)	167,68 <0,001	15,31 <0,001	0,83	0,68