Online ISSN: 3007-0244,
Print ISSN:  2410-4280
THE IMPACT OF COVID-19 ON THE INDICATORS OF THE ONCOLOGICAL SERVICE FOR BREAST CANCER IN KAZAKHSTAN
Introduction. According to International Agency for Research on Cancer in 2040, about 3 million new cases of breast cancer (BC) are predicted and about 1 million women are expected to die from this pathology. The aim of the study to assess the impact of COVID-19 on the indicators of the oncological service for breast cancer in Kazakhstan. Material and research methods. The main method was a retrospective study using descriptive, analytical methods of biomedical statistics and data of the Ministry of Health of the Republic of Kazakhstan – form No.7 and 35 regarding BC (ICD 10 - C50) for 2011-2020. Results. For 2011-2020 42,376 new cases of BC and 12,914 deaths from this pathology were registered. The average annual crude incidence rate was 46.4±1.10/0000 (95%CI=44.3-48.5), and increased from 40.8±0.70/0000 (2011) to 51 .3±0.70/0000 in 2019 and then decrease to 44.2±0.70/0000 in 2020 (p<0.001). In dynamics, mortality rates tended to (p<0.001) decrease from 16.1±0.40/0000 (2009) to 11.9±0.40/0000 in 2019 and 11.5± 0.40/0000 in 2020, and the average annual crude mortality rate was 14.2±0.60/0000 (95%CI=13.1-15.3). Indicators of early diagnosis (stage I-II) improved from 73.4% (2011) to 86.9% in 2019, and decreased to 84.2% in 2020. Proportion of patients with stage III decreased (from 20.9% in 2011 to 8.4% in 2019 and to 10.0% in 2020) and stage IV (from 5.6% to 4.2% and 5.0%, respectively), i.e. neglect rates are declining. The indicators of morphological verification improved from 95.7% to 99.4% over the years. Conclusions. As a result of the analysis, an improvement in the indicators of morphological verification, early diagnosis, a decrease in the neglect and mortality rates were established. The trends in 2011-2019 differed significantly from the period from 2011-2020, which is due to the COVID-19 pandemic on the registration of BC.
Nurbek S. Igissin1,2,3, https://orcid.org/0000-0002-2517-6315 Assem Ya. Toguzbayeva4, https://orcid.org/0000-0003-2937-0278 Aida Zh. Baibusunova1,2, https://orcid.org/0000-0002-4460-0476 Zhansaya B. Telmanova1,2,3, https://orcid.org/0000-0002-2364-6520 Gulnur S. Igissinova4,1, https://orcid.org/0000-0001-6881-2257 Zarina A. Bilyalova1,3, https://orcid.org/0000-0002-0066-235X Daulet M. Baibosynov1,2, https://orcid.org/0000-0001-9209-9463 Zhanerke R. Azhetova1,2, https://orcid.org/0000-0002-8266-1720 Serikbay T. Orozbaev2, https://orcid.org/0000-0003-3895-0426 Kuanysh T. Kulayev5, https://orcid.org/0000-0002-3886-7238 Yerlan K. Kuandykov5, https://orcid.org/0000-0002-7966-1471 1 Central Asian Institute for Medical Research, Astana, the Republic of Kazakhstan; 2 NCJSC «Astana Medical University», Astana, the Republic of Kazakhstan; 3 Eurasian Institute for Cancer Research, Bishkek, the Kyrgyz Republic; 4 NCJSC «Asfendiyarov Kazakh National Medical University», Almaty, the Republic of Kazakhstan; 5 Khoja Akhmet Yassawi International Kazakh-Turkish University, Shymkent, the Republic of Kazakhstan.
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Igissin N.S., Toguzbayeva A.Ya., Baibusunova A.Zh., Telmanova Zh.B., Igissinova G.S., Bilyalova Z.A., Baibosynov D.M., Azhetova Zh.R., Orozbaev S.T., Kulayev K.T., Kuandykov Ye.K. The impact of COVID-19 on the indicators of the oncological service for breast cancer in Kazakhstan // Nauka i Zdravookhranenie [Science & Healthcare]. 2023, (Vol.25) 1, pp. 33-41. doi 10.34689/SH.2023.25.1.004

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