Table III.

Real costs in euro.

	Groups
	G1	G2	G3	p*
Pre-operative	333	458	393	0.23
Operative	9,673	5,751	6,172	0.034
Post-operative	12,919	11,828	13,307	0.065
Total cost	22,924	18,037	19,872	0.043

^*tested using ANOVA; for categorical variables, chi-square test of Pearson.