Positive predictive value of ICD-9th codes for upper gastrointestinal bleeding and perforation in the Sistema Informativo Sanitario Regionale database. [electronic resource]
Producer: 19990714Description: 499-502 p. digitalISSN:- 0895-4356
- Adult
- Aged
- Aged, 80 and over
- Case-Control Studies
- Diagnosis-Related Groups -- standards
- Duodenal Diseases -- classification
- Female
- Gastrointestinal Hemorrhage -- classification
- Humans
- Intestinal Perforation -- classification
- Italy
- Male
- Medical Records Systems, Computerized -- classification
- Middle Aged
- Peptic Ulcer Perforation -- classification
- Predictive Value of Tests
- Retrospective Studies
- Stomach Diseases -- classification
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Publication Type: Journal Article; Multicenter Study
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