Table 4.

Coefficients in the multiple regression model and their significance.

Variable	Coefficient (βi)	Standard error	t	Significance
Constant	3036.35	8049.64	0.377	0.714
Fixed costs	1.04	0.01	95.761	0.000
Visits in which STI was detected	55.57	8.28	6.712	0.000
Other visits (mostly follow-up)	3.75	2.88	1.300	0.223

Dependent variable: Total cost