Table 4.

Patient data

	Routes	Indentification	Contact details	Date of birth	BMI	Occupation	Smoker	Sport/exercise	Risk factors	Comorbidities
Swedish Hernia Registry	Inguinal	Anonymous, gender	No	Yes	Yes	No	Yes	No	Immunosuppression, collagen-related disease, increase risk for bleeding	Diabetes, pulmonary disease
	Primary ventral, incisional, parastomal								Immunosuppression, collagen-related disease, bleeding disease, steroids
Danish Hernia Database	Inguinal	National identity code (CPR)	Yes	Yes	No	No	No	No	No	No
	Port-site, primary ventral, incisional, parastomal				Yes		Yes			Yes for incisional and parastomal hernia
Herniamed	Incisional, parastomal, hiatal, inguinal, umbilical, epigastric	No, only treating institution	No	No	Yes	No	Yes	No	Aneurysm, immunosuppression, thrombocyte aggregation inhibitors, coumarin derivate, coagulopathy, smoking	COPD, asthma, diabetes
Club Hernie	Primary ventral, incisional, inguinal, parastomal, giant incisional	Anonymous, gender	No	Age only	Yes	Yes	Yes	Yes	Aneurysm, immunosuppression, thrombocyte aggregation inhibitors, anticoagulant, personal history of hernia surgery, radiotherapy, chronic medical disease	ASA grading, diabetes, Hepatic disease, COPD, dysuria, constipation
EuraHS	Primary ventral, incisional, parastomal, hiatal, inguinal, open abdomen, abd. wall closure, prophyl. meshes	Anonymous, gender	No	Year only	Yes	Yes	Yes	Yes	Aneurysm, collagen-related disease, immunosuppression, thrombocyte aggregation inhibitors, personal history of hernia surgery	cardiac disease, COPD, diabetes, arterial hypertension, pulmonary disease, hepatic disease, renal disease, malignant disease
Evereg	Incisional	Anonymous, gender	No	Yes	Yes	No	Yes	No	Anticoag, antiplatelet, immunosupressants, smoking, personal history of hernia surgery	COPD, diabetes, cardiac disease, arterial hypertension, hepatic disease, renal disease, malignant disease
AHSQC	Primary ventral, incisional, parastomal, inguinal	Yes	Yes	Yes	Yes	No	Yes	Yes	Anticoagulant use, antiplatelet use, immunosuppressant use, nicotine use and route, history of hernia operation/open abdomen/myofascial release/surgical site infection, MRSA, currently active infection	Liver failure, ascites, HTN, diabetes, dialysis, COPD, dyspnea, inflammatory bowel disease, aneurysm

COPD Chronic obstructive pulmonary disease, MRSA Multiresistant Staphylococcus aureus