Cervical screening programme saves lives in more ways than one

Regular cervical screening saves lives not only by discovering pre-cursors to cervical cancer before they become invasive – but also by improving the chances of successful treatment in cases where invasive cancer could not be prevented.
‘We found that women who die of cervical cancer have usually not been screened for a long time,’ says research leader Professor Pär Sparén of the Department of Medical Epidemiology and Biostatistics at Karolinska Institutet. ‘This is important to know for women who are hesitant about screening and for the sake of future changes to screening programmes.’
Around 450 women develop cervical cancer every year in Sweden, of whom about 140 die. Less than twenty of the vast majority of women (about 80 per cent) who undergo cervical screening every three years develop incurable and fatal cervical cancer. Moreover, of the cases discovered during routine screening before symptoms appear fewer than five every year are incurable.
In this present study, the researchers examined all new cases (a total of 1,230) of cervical cancer in Sweden over three years (1999-2001) using data from the National Quality Register for Cervical Screening. The project is part of the ACCES (Advancing Cervical Cancer Eradication Strategies) project, which was set up to monitor and evaluate the long-term effects of the cervical screening programme and vaccination programme against human papillomavirus (HPV), which causes cervical cancer.
The results of the study show, that women with symptom-discovered cervical cancer have a much better chance of being cured if they have previously had regular smear tests than if they have not taken part in any screening programme. About 92 per cent of the women with cervical cancer discovered through screening (i.e. before the appearance of symptoms), are cured from their cancer, even those who undergo screening for the first time.
‘This clearly shows that the positive results for cervical cancer after the introduction of screening have nothing to do with the over-diagnosis of benign cancers,’ says lead author Bengt Andrae, consultant at Gävle Hospital’s gynaecological clinic and researcher at Karolinska Institutet. ‘What it does show is that early diagnosis significantly improves the chance of successful treatment. This is a powerful argument for taking a Pap smear when invited to cervical screening, even if you feel healthy.’ Karolinska Institute