Abstract
validation of codes of hospital discharge records (SDO) for identification of new cases of malignant testicular tumour in the Veneto Region (Northern Italy). record linkage between the regional archive of SDO and the archive of the Veneto Tumour Registry (VTR). extraction of cases from SDO source with ICD-9-CM 186 code for diagnosis and 62.3-62.4 codes for surgical procedure, and from VTR database using ICD-O-3 C62 code for site and 9060-9062, 9064-9066, 9070, 9071, 9080-9083, 9085, 9100, 9101 codes for morphology, with 5th digit behaviour code equal to "/3". Comparison of the two sources in a classification table using VTR data as gold standard. positive predictive value and sensitivity of SDO, with 95% confidence interval (95%CI) based on binomial distribution. from 2006 to 2008, in areas covered by the registry, SDO and VTR identified, respectively, 221 and 216 cases of testicular cancer. SDO procedure showed a sensitivity of 92% (95%CI 87%- 95%) and a positive predictive value of 90% (95%CI 85%-93%). the SDO procedure can be considered an acceptable proxy for testis cancer incidence, thus allowing a wider spatiotemporal observation of the epidemiological trends.
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