Background: The aim was to investigate time trends for incidence and long-term net survival in the morphologic subtypes and stages of cervical cancer in Sweden during the period 1960-2014. Methods: Women with invasive cervical cancer were identified through the Swedish Cancer Registry. Incidence and net survival were calculated according to morphology, age at diagnosis, and FIGO stage at diagnosis. Results: In total, 29,579 cases of invasive cervical cancer between 1960 and 2014 were included. The age-standardized incidence for squamous cell carcinoma (SCC) decreased until 2000; thereafter, the incidence rate stagnated, and a small increase was found in 2014. The incidence of adenocarcinoma (ADC) continuously increased. The age-standardized 5-year net survival increased. However, decreasing net survival with increasing age was found. A higher stage at diagnosis showed a worse net survival. SCC and ADC did not statistically differ as regards net survival in the last years of the study. Conclusions: Age-standardized 5-year net survival improved between 1960 and 2014. A positive trend for short- and long-term net survival was seen for women aged 18-64 years but long-term net survival for women {greater than or equal to} 75 years decreased. In this study, age and FIGO stage at diagnosis were found to be important prognostic factors in determining net survival. The morphologies, SCC, and ADC did not statistically differ as regards net survival in the last years of the study. Impact: This study demonstrates longitudinal data on cervical cancer in Sweden for over 50 years with sub analyses on morphology, age, and stage at diagnosis.
Introduction: Cervical cancer is a major cause of mortality and morbidity. We aimed to estimate the association between sociodemographic factors and cervical neoplasia. Material and methods:In this Swedish nationwide open cohort study, 4 120 557 women aged ≥15 years at baseline were included between January 1, 2002 and December 31, 2018. The two outcomes were cervical cancer and carcinoma in situ identified in the Swedish Cancer Register. Sociodemographic factors (age, education level, family income level, region of residency, country of origin) were the main predictors. Incidence rates per 10 000 person-years were calculated. Cox regression was used to estimate hazard ratios. Sensitivity analyses were conducted, including parity, urogenital infections, alcohol-and drug-use disorders, and chronic obstructive pulmonary disease (used as a proxy for tobacco abuse).Results: In 38.9 million person-years of follow-up, 5781 (incidence rate: 1.5, 95% confidence interval [CI] 1.4-1.5) and 62 249 (incidence rate 16.9, 95% CI 15.9-16.1) women were diagnosed with cervical cancer and carcinoma in situ, respectively.Women from Eastern Europe had a hazard ratio of 1.18 (95% CI 1.05-1.33) for cervical cancer compared with Swedish-born women, while women from non-Western regions were inversely associated with cervical cancer and carcinoma in situ. Women with a low education level had a hazard ratio of 1.37 (95% CI 1.29-1.45) for cervical cancer compared with women with a high education level. Conclusions:Women from the Middle East and Africa living in Sweden seem to suffer less from cervical neoplasia, whereas women with low education and women from Eastern Europe seem to suffer more from cervical cancer.
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