Table 2. National Registries Used for Outcome Assessment in the Norwegian Capture the Fracture Initiative (NoFRACT) Study.

Registry	Variable	Type of Fractures
Norwegian Patient Registry	Sex, birth year, hospital, hospitalization dates, municipality of residence, treatment level, surgical procedure codes, and Charlson comorbidity index	Fractures treated in hospitals
National Population Register	Dates of migration and death, marital status, and country of birth	All fractures
Statistics Norway	Education level	All fractures
Norway Control and Reimbursement of Healthcare Claims	ICPC-2 diagnosis codes L72-L76, including subgroup	Fractures treated in primary care

Abbreviation: ICCP-2, International Classification of Primary Care, 2nd ed.