Table 1 Variables examined in the study

Examined risk factors for carrying resistant bacteria

-Travel activity last year

-Work/stay at hospital, nursing home, schools, prison, military, asylum center/refugee camp, hostel, daycare or war zone in and outside the Nordic region.

-Signs of infections, shared sports equipment, tattoos/piercings

-Contact with mink farm, live pigs, cattle or poultry

-Hospitalized for the past six months

-Invasive surgery performed at a foreign clinic/hospital

-Drainage tubes, indwelling catheters, nutrition tubes, ulcers, abscesses, eczema, chronic skin disorders or IV drug abuse within the last six months

-Antibiotic treatment within the last 6 months

-Previously carrier of resistant bacteria, household-like contact with carrier or worked/stayed in places with known transmission of resistant bacteria

Outcome variables

-MRSA: methicillin resistant Staphyloccus aureus

-ESBL: extended-spectrum beta-lactamase producing enterobacteria

-VRE: vancomycin resistant enterococci (VRE)

-CPE: carbapenem resistant enterobacteria

-CD: Clostridium difficile