Résumé :
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[BDSP. Notice produite par INIST R0xW7P3I. Diffusion soumise à autorisation]. Context Increased 5-year survival for cancer patients is generally inferred to mean that cancer treatment has improved and that fewer patients die of cancer. Increased 5-year survival, however, may also reflect changes in diagnosis : finding more people with early-stage cancer, including some who would never have become symptomatic from their cancer. Objective To determine the relationship over time between 5-year cancer survival and 2 other measures of cancer burden, mortality and incidence. Design and Setting Using population-based statistics reported by the National Cancer Institute Surveillance, Epidemiology, and End Results Program, we calculated the change in 5-year survival from 1950 to 1995 for the 20 most common solid tumor types. Using the tumor as the unit of analysis, we correlated changes in 5-year survival with changes in mortality and incidence. Main Outcome Measure The association between changes in 5-year survival and changes in mortality and incidence measured using simple correlation coefficients (Pearson and Spearman). Results From 1950 to 1995, there was an increase in 5-year survival for each of the 20 tumor types. The absolute increase in 5-year survival ranged from 3% (pancreatic cancer) to 50% (prostate cancer). During the same period, mortality rates declined for 12 types of cancer and increased for the remaining 8 types. (...)
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