Hysterectomy-corrected incidence rates of cervical and uterine cancer in Massachusetts, USA, 1995-2010
A partir des données du registre du Massachusetts des cancers sur la période 1995-2010, cette étude analyse l'évolution de l'incidence des cancers de l'utérus et du col de l'utérus, en fonction de critères ethniques et en appliquant une correction sur la base de la prévalence des hystérectomies
Purpose : The aim is to provide ethnicity-specific incidence trends of cervical and uterine cancer uncorrected and corrected for the prevalence of hysterectomy in Massachusetts, USA. Methods : We used incidence data of invasive cervical (ICD-O-3: C53) and uterine cancer (ICD-O-3: C54-C55) diagnosed from 1995 to 2010 from the Massachusetts Cancer Registry. Data from the Behavioral Risk Factor Surveillance Survey for Massachusetts were used to model the ethnicity-specific prevalence of hysterectomy. We standardized rates by the U.S. 2000 population standard for the periods 1995-1998, 1999-2002, 2003-2006, and 2007-2010. Results : Depending on the time period, corrected cervical cancer rates increased by 1.2-2.8, 5.6-8.3, and 3.2-8.2 per 100,000 person-years and uterine cancer rates increased by 14.3-16.7, 14.8-29.3, and 6.7-15.4 per 100,000 person-years among white non-Hispanic women, black non-Hispanic women, and Hispanic women respectively. Corrected estimated annual percentage changes increased for uterine cancer among black non-Hispanic women aged 60 years and more. Ethnic disparities between white non-Hispanic women and the other groups became smaller for uterine cancer and larger for cervical cancer after correction. Discussion : Corrections of cervical and uterine cancer rates for hysterectomy prevalence are important as ethnic disparities, age patterns and time trends of cervical and uterine cancer incidence rates change.