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  • 1
    Keywords: CANCER ; SURVIVAL ; DIAGNOSIS ; DISEASE ; POPULATION ; AGE ; colorectal cancer ; COLON-CANCER ; MORPHOLOGY ; SUBSITE ; EUROPE ; PATIENT SURVIVAL ; PERIOD ANALYSIS ; colonoscopy ; EMPIRICAL-EVALUATION ; colorectal ; UP-TO-DATE ; EUROCARE-4
    Abstract: BACKGROUND: Colorectal cancer is the most common cancer in Germany and the second most common cause of cancer-related deaths in both men and women. The aim of this study is to provide detailed analysis of recent developments in survival of colorectal cancer patients using newly available data on a national basis. METHODS: We included data from 11 German cancer registries covering a population of 33 million inhabitants. Period analysis and modelled period analysis were used to provide most up-to-date estimates of 5-year relative survival in 2002-2006. RESULTS: The analysis was based on records of 164 996 colorectal cancer patients. Five-year relative survival was 63.0% overall, decreased with age and was significantly higher among women than among men in patients under 75 years. Overall age-adjusted 5-year relative survival increased from 60.6 to 65.0% over the period 2002-2006. Significant increase in survival was only observed in patients with localised or regional disease. Highest subsite-specific survival was observed in patients with cancer in descending (67.7%) and ascending (66.5%) colon. CONCLUSION: Survival of patients with colorectal cancer continued to increase in the early 21st century in Germany, with 5-year relative survival reaching 65% in 2006. However, lack of progress still persisted in patients with advanced disease.
    Type of Publication: Journal article published
    PubMed ID: 22555397
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  • 2
    Keywords: HORMONE REPLACEMENT THERAPY ; LONG-TERM SURVIVAL ; COLON-CANCER ; POSTMENOPAUSAL WOMEN ; PERIOD ANALYSIS ; RELATIVE SURVIVAL ; UP-TO-DATE ; EUROCARE HIGH-RESOLUTION ; EARLY 21ST-CENTURY ; GENDER INFLUENCES TREATMENT
    Abstract: Risk of colorectal cancer (CRC) is considerably higher in men compared to women; however, there is inconclusive evidence of sex differences in CRC prognosis. We aimed to assess and explain sex differences in 5-year relative survival using standard and model-based period analysis among 164,996 patients diagnosed with CRC from 1997 to 2006 and reported to 11 German cancer registries covering a population of 33 million inhabitants. Age-adjusted 5-year relative survival was higher in women (64.5% vs. 61.9%, P 〈 0.0001). A substantial survival advantage of women was confirmed in multivariate analysis after adjusting for CRC stage and subsite in subjects under 65 years of age (relative excess risk, RER 0.86, 95% CI 0.82-0.90), but not in older subjects (RER 1.01, 95% CI 0.98-1.04); this pattern was similar in the 1st and in the 2nd to 5th year after diagnosis. The survival advantage of women varied by CRC stage and age and was most pronounced for localized disease (RERs 0.59-0.88 in various age subgroups) and in patients under 45 years of age (RERs 0.59, 0.72 and 0.76 in patients with localized, regional or advanced disease, respectively). On the contrary, sex differences in survival did not vary by location of CRC. In conclusion, our large population-based study confirmed a survival advantage of female compared to male CRC patients, most notably in young and middle aged patients and patients with localized disease. The effect of sex hormones, either endogenous or through hormonal replacement therapy, might be the most plausible explanation for the observed patterns.
    Type of Publication: Journal article published
    PubMed ID: 23861851
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