J M Escribà1,2, M Banqué3,4, F Macià3, J Gálvez5, L Esteban5, L Pareja5, R Clèries5,6, X Sanz5, X Castells3,7, J M Borrás5,6, J Ribes5,6. 1. Catalan Cancer Registry, Cancer Planning Directorate, Department of Health, Generalitat de Catalunya, Av. Gran Via 199-203, 1st floor, 08908, L' Hospitalet de Llobregat, Spain. jmescriba@iconcologia.net. 2. Department of Clinical Sciences, University of Barcelona, Campus de Bellvitge, Feixa Llarga s/n, 08907, L' Hospitalet de Llobregat, Barcelona, Spain. jmescriba@iconcologia.net. 3. Unit of Prevention and Cancer Registry, Service of Epidemiology and Evaluation, Parc de Salut Mar, Barcelona, Passeig Marítim 25-29, 08003, Barcelona, Spain. 4. Anoia Health Consortium, Av. Catalunya 11, 08700, Igualada, Barcelona, Spain. 5. Catalan Cancer Registry, Cancer Planning Directorate, Department of Health, Generalitat de Catalunya, Av. Gran Via 199-203, 1st floor, 08908, L' Hospitalet de Llobregat, Spain. 6. Department of Clinical Sciences, University of Barcelona, Campus de Bellvitge, Feixa Llarga s/n, 08907, L' Hospitalet de Llobregat, Barcelona, Spain. 7. Faculty of Medicine, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Bellaterra, Spain.
Abstract
OBJECTIVE: To validate the Catalan minimum basic data set (MBDS) of hospital discharges as an information source for detecting incident breast (BC) and colorectal cancer (CRC), against the Hospital del Mar Cancer Registry (RTHMar) in Barcelona (Spain) as the gold standard. METHODS: Using ASEDAT software (Analysis, Selection and Extraction of Tumour Data), we identified Catalan public hospital discharge abstracts in patients with a first-time diagnosis of BC and CRC in the years 2005, 2008, and 2011, aggregated by unique patient identifiers and sorted by date. Once merged with the RTHMar database and anonymized, tumour-specific algorithms were validated to extract data on incident cases, tumour stage, surgical treatment, and date of incidence. RESULTS: MBDS had a respective sensitivity and positive predictive value (PPV) of 78.0% (564/723) and 90.5% (564/623) for BC case detection; and 83.9% (387/461) and 94.9% (387/408) for CRC case detection. The staging algorithms overestimated the proportion of local-stage cases and underestimated the regional-stage cases in both cancers. When loco-regional stage and surgery were combined, sensitivity and PPV reached 98.3% and 99.8%, respectively, for BC and 96.4% and 98.4% for CRC. The differences between dates of incidence between RTHMar and MBDS were greater for BC cases without initial surgery, whereas they were generally smaller and homogeneous for CRC cases. CONCLUSIONS: The MBDS is a valid and efficient instrument to improve the completeness of a hospital-based cancer registry (HBCR), particularly in BC and CRC, which require hospitalization and are predominantly surgical.
OBJECTIVE: To validate the Catalan minimum basic data set (MBDS) of hospital discharges as an information source for detecting incident breast (BC) and colorectal cancer (CRC), against the Hospital del Mar Cancer Registry (RTHMar) in Barcelona (Spain) as the gold standard. METHODS: Using ASEDAT software (Analysis, Selection and Extraction of Tumour Data), we identified Catalan public hospital discharge abstracts in patients with a first-time diagnosis of BC and CRC in the years 2005, 2008, and 2011, aggregated by unique patient identifiers and sorted by date. Once merged with the RTHMar database and anonymized, tumour-specific algorithms were validated to extract data on incident cases, tumour stage, surgical treatment, and date of incidence. RESULTS: MBDS had a respective sensitivity and positive predictive value (PPV) of 78.0% (564/723) and 90.5% (564/623) for BC case detection; and 83.9% (387/461) and 94.9% (387/408) for CRC case detection. The staging algorithms overestimated the proportion of local-stage cases and underestimated the regional-stage cases in both cancers. When loco-regional stage and surgery were combined, sensitivity and PPV reached 98.3% and 99.8%, respectively, for BC and 96.4% and 98.4% for CRC. The differences between dates of incidence between RTHMar and MBDS were greater for BC cases without initial surgery, whereas they were generally smaller and homogeneous for CRC cases. CONCLUSIONS: The MBDS is a valid and efficient instrument to improve the completeness of a hospital-based cancer registry (HBCR), particularly in BC and CRC, which require hospitalization and are predominantly surgical.
Entities:
Keywords:
Breast cancer; Case ascertainment; Colorectal cancer; Hospital discharge abstracts; Hospital-based cancer registry; Validation studies
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