Fig. 1a.

Endometriosis risk curves based on scores 1 and 2.

The curves show the relationship between the score values (x-axis) and the risk of endometriosis (y-axis). The curves for scores 1 and 2 are presented in the same figure. The theoretical risk of endometriosis is calculated from the model based on the results of regression analysis. The score was calculated for each patient with the coefficients of the multiple regression.

Above a value of 25 for score 1 and a value of 24 for score 2, the risk of endometriosis was greater than 60% and increased rapidly (most of the endometriosis patients were in this group). Below a value of 11 for score 1 and a value of 7 for score 2, the risk was less than 30% (most of disease-free patients were in this group). Between these two values, the risk increased progressively. The intermediate value of 18 for score 1 and a value of 17 for score 2 provided the best cut-off point to classify the whole population.