Clinical Research Directory

Inclusion Criteria: * Individuals aged 18 years or older with an occupational injury recognized by the National Insurance Institute. * Occupational injury occurring between January 1, 2020, and December 31, 2024. * Injury occurring at the workplace, during occupational travel, or while commuting to or from work. * Valid injury date and geographic information sufficient to assign the accident to one of the seven predefined geographic-climatic regions and the nearest representative meteorological station. * Meteorological measurements available for the injury period and eligible matched control periods. For time-specific analyses, a valid recorded accident time permitting linkage to the closest preceding three-hour meteorological observation. Exclusion Criteria: * Occupational diseases, repetitive-exposure conditions, or gradual-onset disorders without a clearly defined accident date. * Rejected, withdrawn, or unconfirmed occupational-injury claims. * Missing or invalid accident date or geographic information preventing linkage with meteorological data. * Accidents occurring outside the predefined geographic-climatic regions or beyond the prespecified maximum distance from an eligible meteorological station. * Duplicate or administratively repeated records referring to the same occupational-injury event. * Injury events for which no eligible matched control periods or corresponding meteorological measurements are available. * Individuals younger than 18 years.