Standardized differences of metric variables both before (original sample) and after matching (matched sample).

Table 1: Standardized differences of metric variables both before (original sample) and after matching (matched sample).

		Operation		Operation
		Roux-en-Y-Gastric Bypass	Sleeve Gastrectomy	Matched Sample	Original Sample
Age	Mean Value ± SD	45.3 ± 10.9	45.2 ± 11.3	0.009	0.054
BMI	Mean Value ± SD	49.6 ± 7.6	49.4 ± 8.2	0.016	0.282
Number of comorbordities	Mean Value ± SD	3.6 ± 2.4	3.6 ± 2.2	0.022	0.044