Table 4. Univariate analysis showing the association between FPA 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 FPA)

Xj	a* p-value	b* p-value	R**	R2 ***
Age (years)	3,93 0,005	0,009 0,69	0,06	0,003
BMI (kg/m2)	3,71 0,05	0,03 0,68	0,06	0,003
PAF duration (hours)	2,22 <0,001	0,28 <0,001	0,84	0,70