Supplementary Table 3: Standardized differences before and after matching: TAPP vs. open-mesh

Unmatched / Matched
Open-mesh (n=316) / TAPP (n=311) / Open-mesh (n=176) / TAPP (n=176)
Mean / Mean / d in % / Mean / Mean / d in %
Patient characteristics
Age* / 66.28 / 56.67 / -260.86 / 57.07 / 57.39 / 8.50
Age category / 18-30 / 0.01 / 0.05 / 24.65 / 0.01 / 0.01 / 0.00
31-55 / 0.20 / 0.42 / 50.91 / 0.43 / 0.43 / 0.00
56-70 / 0.37 / 0.36 / -1.43 / 0.41 / 0.41 / 0.00
>70 / 0.43 / 0.17 / -59.34 / 0.15 / 0.15 / 0.00
Weighted Charslson Sum / 0.55 / 0.13 / -48.16 / 0.07 / 0.07 / 0.00
Principal diagnosis
K40.9- / 0.91 / 0.57 / -84.78 / 0.73 / 0.73 / 0.00
K40.2- / 0.09 / 0.43 / 84.78 / 0.27 / 0.27 / 0.00
Hospital
1 / 0.06 / 0.21 / 44.26 / 0.31 / 0.31 / 0.00
4 / 0.19 / 0.08 / -34.39 / 0.10 / 0.10 / 0.00
7 / 0.25 / 0.01 / -78.23 / 0.01 / 0.01 / 0.00
10 / 0.12 / 0.16 / 11.58 / 0.23 / 0.23 / 0.00
11 / 0.08 / 0.11 / 9.32 / 0.13 / 0.13 / 0.00
12 / 0.23 / 0.14 / -22.24 / 0.13 / 0.13 / 0.00
16 / 0.02 / 0.28 / 77.12 / 0.10 / 0.10 / 0.00
22 / 0.04 / 0.01 / -18.66 / 0.01 / 0.01 / 0.00
*Standardized differences of the metric variable Age are provided for reasons of clarity, matching was performed with dichotomous variables for age categories 1-4.

Supplementary Table 3: Standardized differences before and after matching: TAPP vs. open-mesh

n=frequency, d=standardized differences, K40.9-= ICD-10GM code for unilateral uncomplicated inguinal hernia, K40.2-=ICD-10GM code for bilateral uncomplicated hernia, Open-mesh=open-mesh hernia repair, TAPP=transabdominal preperitoneal hernia repair.