Browsing by Author "Baltzer, Nicholas"
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Item Age-specific and genotype-specific carcinogenic human papillomavirus prevalence in a country with a high cervical cancer burden : results of a cross-sectional study in Estonia(2023-06-01) Pärna, Kersti; Nygård, Mari; Tisler, Anna; Toompere, Karolin; Naaber, Paul; Ratnik, Kaspar; Ķīvīte Urtāne, Anda; Zodzika, Jana; Stankūnas, Mindaugas; Baltzer, Nicholas; Uusküla, Anneli; Institute of Public Health; Department of Public Health and Epidemiology; Department of Obstetrics and GynaecologyOBJECTIVES: To describe age-specific and type-specific carcinogenic human papillomavirus (HPV) prevalence prior to large-scale effect of HPV vaccines in Estonia and to analyse the risk factors associated with carcinogenic HPV. DESIGN: Cross-sectional study using self-administered questionnaire and self-collected vaginal swabs for detection of HPV infection. SETTING: Estonian Biobank database. PARTICIPANTS: Stratified random sample of women aged 30-33, 57-60 and 67-70 years living in one of the three largest counties in Estonia. Of 3065 women approached, 1347 (43.9%) returned questionnaires and specimens for HPV DNA detection. OUTCOME MEASURES: HPV prevalence and fully adjusted ORs with 95% CIs for risk factors. RESULTS: HPV prevalence was highest among women aged 30-33 years (18.7%; 95% CI 15.8 to 21.9) followed by those aged 67-70 years (16.7%; 95% CI 12.4 to 22.0) and 57-60 years (10.2%; 95% CI 7.8 to 13.3). HPV16 and HPV56 were the most common among women aged 30-33 years (both 4.0%; 95% CI 2.7 to 5.9), and HPV68 was the most common among women aged 57-60 years (2.8%; 95% CI 1.5 to 4.7) and 67-70 years (6.4%; 95% CI 3.6 to 10.4). Vaccination with nonavalent vaccine would have halved the carcinogenic HPV prevalence among women aged 30-33 years. The odds of infection with carcinogenic HPV were higher among women with six or more sexual partners among younger (OR 2.99; 95% CI 1.54 to 5.81) and older (OR 3.80; 95% CI 1.25 to 11.55) women and lower (OR 0.35; 95% CI 0.17 to 0.72) among younger married women. CONCLUSIONS: This study demonstrated U-shaped age-specific genotype profile of carcinogenic HPV prevalence, indicating that public health providers should focus on developing exit strategies for the cervical cancer screening programme in Estonia with a possible extension of HPV testing beyond the current screening age of 65 years. Generalisability of the findings of this study may be affected by the low response rate.Item Cervical Cancer in the Baltic States : Can Intelligent and Personalized Cancer Screening Change the Situation?(2022) Stankūnas, Mindaugas; Pärna, Kersti; Tisler, Anna; Ķīvīte-Urtāne, Anda; Kojalo, Una; Zodzika, Jana; Baltzer, Nicholas; Nygard, Jan; Nygard, Mari; Uuskula, Anneli; Institute of Public HealthThe three Baltic States (Estonia, Latvia, and Lithuania) are among the European Union countries with the highest incidence and mortality rates for cervical cancer. In order to tackle this public health challenge, there is an urgent need to implement more advanced and effective methods in cervical cancer prevention in Baltic countries. Nationwide cervical cancer screening programs in the Baltic States commenced in 2004-2009. While the organized screening programs in these countries differ in some relevant details (target age groups, screening interval), the underlying principles and problems, barriers are universal. However, the outcomes of present screening programs are unsatisfactory. In addition, universal screening programs are extremely costly. There is a potential need for more intelligent and personalized cervical cancer screening program. In 2019 the project "Towards elimination of cervical cancer: intelligent and personalized solutions for cancer screening" (2020-2023) was developed with the main objective - to develop improved and personalized cancer screening methods within a sustainable health care system. It is expected, that more sophisticated cervical cancer screening model will be implemented in Estonia, Latvia, and Lithuania, and will have a positive impact to epidemiology of cervical cancer and public health in general.Item Comment on "The European response to the WHO call to eliminate cervical cancer as a public health problem"(2023-08-15) Tisler, Anna; Nygard, Mari; Kivite-Urtane, Anda; Berza, Natalija; Zodzika, Jana; Stankunas, Mindaugas; Baltzer, Nicholas; Pärna, Kersti; Uusküla, Anneli; Institute of Public HealthItem An overview of cervical cancer epidemiology and prevention in the Baltic States(2023-01) Kojalo, Una; Tisler, Anna; Parna, Kersti; Kivite-Urtane, Anda; Zodzika, Jana; Stankunas, Mindaugas; Baltzer, Nicholas; Nygard, Mari; Uuskula, Anneli; Institute of Public HealthAIMS: To inform future Baltic States-specific policy analyses, we aimed to provide an overview of cervical cancer epidemiology and existing prevention efforts in Estonia, Latvia and Lithuania. METHODS: A structured desk review: we compiled and summarized data on current prevention strategies, population demography and epidemiology (high risk human papillomavirus (HPV) prevalence and cervical cancer incidence and mortality over time) for each Baltic State by reviewing published literature and official guidelines, performing registry-based analyses using secondary data and having discussions with experts in each country. RESULTS: We observed important similarities in the three Baltic States: high burden of the disease (high incidence and mortality of cervical cancer, changes in TNM (Classification of Malignant Tumors) stage distribution towards later stage at diagnosis), high burden of high-risk HPV in general population and suboptimal implementation of the preventive strategies as low screening and HPV vaccination coverage. CONCLUSIONS: Cervical cancer remains a substantial health problem in the region and the efforts in addressing barriers by implementing a four-step plan for elimination cervical cancer in Europe should be made. This goal is achievable through evidence-based steps in four key areas: vaccination, screening, treatment, and public awareness.