Extraction of risk factors for cardiovascular diseases from Chinese electronic medical records.

•The first research concerns cardiovascular diseases (CVDs) risk factors extraction of Chinese clinical records.•The first developed automatic information extraction system of CVDs risk factors on Chinese electronic medical records.•The extraction system shows strong competition and good performance when compared with exist risk factor extraction system of English clinical records.•The experimental results reveal that specialized features input improves the performance of NER and textual classification deep models.