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Rise in Cervical Cancer Incidence Expected Among Older Women

by Chrisy Ngilneii on December 19, 2017 at 11:14 AM
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Rise in Cervical Cancer Incidence Expected Among Older Women

Older women will face greater risk for cervical cancer while the incidence in young women is set to decline 75 percent by 2040 with deaths close to eradicated, according to recent research at the Queen Mary University of London.

Women aged 50-64 will see a 62 percent increase in incidence which could lead to a 143 percent rise in mortality (183 in 2015 to 449 in 2040).

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Jo's Cervical Cancer Trust funded and commissioned a team at Queen Mary University of London, including Peter Sasieni, Professor of Biostatistics and Cancer Epidemiology, and Dr Alejandra Castanon, Epidemiologist - who authored the research - to develop a new model that enabled the charity to explore incidence of cervical cancer in England up to 2040. This includes the impact of changing cervical screening coverage, and introducing both HPV primary screening and the 9-valent human papillomavirus (HPV) vaccine could have.

Cervical cancer is the most common cancer in women under 35 in the UK but, according to the model, this will shift dramatically by 2040 with the burden of the disease moving to older women. Among younger women, born after 1991 who have benefited from the introduction of the HPV vaccination programme in 2008, eradication of the cancer is firmly on the horizon.
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The research finds that:
  • Incidence among 50-54-year-olds will increase 50 percent (177 cases in 2015 to 265 cases in 2040).
  • Incidence among 60-64-year-olds will climb 54 percent (144 cases in 2015 to 222 in 2040) and mortality 109 percent (79 to 165 deaths a year).
  • The introduction of more effective vaccination and screening test could see incidence more than halve among 25-44-year-olds (1,313 cases in 2015 to 599 in 2040).
  • Screening attendance is declining year-on-year, having fallen 3.4 percent in England since 2012, and if it were to decline to 66 percent (currently 72 percent), among 60-64-year-olds alone incidence will rise 71 percent and mortality could rise 128 percent.
While vaccination uptake is currently high, the research highlights the importance of not being complacent as if uptake were to drop to 40 percent, incidence in 25 to 44 year-olds would increase by 38 percent (to 945).

Dr Alejandra Castanon from Queen Mary said: "We used a novel method to estimate cervical cancer incidence rates up to 2040. It combines three levels of modeling making it very flexible. In contrast to a microsimulation model, our model can take into account how year of birth affects risk of cervical cancer throughout a woman's life. In addition, the model is flexible in that we can change the screening coverage, the screening test and the vaccine type and observe their effect on cancer incidence.

This study shows how the age-specific incidence of cervical cancer will change over the next 20 years. Women currently aged between 25 and 40 will remain at high risk of cervical cancer throughout their lives, while women younger than 25 will see their risk decrease by around 50%. This has implications for the way we invest in and target screening."

Robert Music, Chief Executive, Jo's Cervical Cancer Trust, said: "We are on the path to eradicating cervical cancer among young women which is extraordinary. However, we are faced with an immediate challenge among women who will be over 50 in 2040. This research should serve as a wake up call and the need for action.

Continued declining cervical screening attendance will cost lives at all ages and must not happen. We are faced with an aging population and risk among older women rocketing, therefore changes to the programme which could reduce this risk must be explored, including increasing the screening age from 64 and self-testing. We want to see cervical cancer become a disease of the past with no more women losing their lives to the disease. Jo's Cervical Cancer Trust are today launching an ambitious new strategy to 2022 setting out our role in reaching eradication and call on others to join us."

The model underlines how primary HPV screening will be of utmost importance in reducing risk of the disease among women born before 1991. The researchers and charity warn that delays in rolling it out will only exacerbate the burden of disease among this age group, and increasing screening coverage must remain a critical challenge and priority.

Source: Eurekalert
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