Risk Factors for Venous Thromboembolism in 1.3 Million Pregnancies: A Nationwide Prospective Cohort
Table 1
Definition of exposure variables, confounders and outcome variables from various registries (The National Registry of Patients, The National Registry of medical Products Statistics, The Danish Birth Registry, Statistics of Denmark and Cause of Death Registry) by International Classification of Diseases (ICD), operation and Anatomical Therapeutic Chemical (ATC) codes.