Abstract 1309
Background
Organized cervical cancer screening program for women aged 30 or over using Pap Smear has been launched in Korea since 1999. However, there is limited evidence showing the effectiveness of this nationwide screening program in reducing cervical cancer mortality. In this study, we aim to examine cervical cancer mortality among screened and non-screened women who participated in the Korean National Cancer Screening Program (KNCSP) from 2002 to 2003.
Methods
We conducted a prospective cohort study of women aged 30-79 years invited to the KNCSP between 2002 - 2003 and followed up to 2015 for deaths from cervical cancer and other causes. Women with incomplete ID, diagnosed with cervical cancer before entering the cohort, or older than 79 years were excluded. Finally, a total of 8,262,267 women aged 30-79 were included, and their cervical cancer screening exposure, cancer incidence, and death information were collected from the KNCSP database, National Cancer Registry, and death certificate from Statistics Korea. There were 6,615,614 women in the screen group (mean person-year: 9.74) and 5,814,989 women in the non-screen group (mean person-year: 8.33). Incidence rate ratio (IRR) and Mortality rate ratio (MRR) were used to compare between screen and non-screen cohorts using Poisson regression model. The MRRs and IRRs were adjusted for age at inclusion in the cohort, insurance type, and self-selection bias.
Results
The crude mortality rate was 3.49 and 8.77 per 100,000 women-years for screen and non-screen group, respectively. MRR for cervical cancer was 0.46 (95% confidence interval (CI): 0.44-0.48). After adjusting for self-selection bias, it was estimated that there was 36.11% of mortality reduction in screen group compared to non-screen group. Also, IRR of invasive cancer in screen group was 0.74 (95% CI: 0.72-0.76) compared to non-screen group. However, there was no significant reduction in the total number of invasive cervical cancer and cervical cancer in situ incidence rate (IRR: 0.98; 95%CI: 0.98 (0.96-1.00)).
Conclusions
We found that after 13 years of follow-up, 36.11% of cervical cancer mortality reduction was observed among women who attended the Korean National Cervical Cancer Screening Program.
Clinical trial identification
Editorial acknowledgement
Legal entity responsible for the study
Kui Son Choi.
Funding
National Cancer Center, Korea (Grant number: 1610401) and International Cooperation & Education Program (NCCRI·NCCI 52210-52211,2019) of National Cancer Center, Korea.
Disclosure
All authors have declared no conflicts of interest.
Resources from the same session
1058 - Assessment of CPS+EG, Neo-Bioscore and modified Neo-Bioscore in breast cancer patients treated with preoperative systemic therapy: a multicenter cohort study
Presenter: LING XU
Session: Poster Display session 2
Resources:
Abstract
1156 - The concordance of treatment decision guided by Oncotype and the PREDICT tool in early stage breast cancer
Presenter: Hadar Goldvaser
Session: Poster Display session 2
Resources:
Abstract
3447 - Influence of first treatment delay on survival among breast cancer subtypes
Presenter: Irene Zarcos Pedrinaci
Session: Poster Display session 2
Resources:
Abstract
3505 - Clinical features of early-stage (I-III) triple-negative breast cancer (TNBC) patients with tumors exhibiting low-overall change in molecular profile after neoadjuvant therapy.
Presenter: Nour Abuhadra
Session: Poster Display session 2
Resources:
Abstract
5442 - Meta-analysis in HER2+ early breast cancer therapies and cost-effectiveness in a Brazilian perspective
Presenter: Marcos Magalhaes
Session: Poster Display session 2
Resources:
Abstract
1570 - Anti-mullerian hormone (AMH) levels and antral follicle counts (AFC) may predict ovarian reserves before systemic chemotherapy (SC) in women with breast cancer(BC); a prospective clinical study
Presenter: Cetin Ordu
Session: Poster Display session 2
Resources:
Abstract
2698 - Prognosis of selected triple negative apocrine breast cancer patients who did not receive adjuvant chemotherapy.
Presenter: Giuseppe Cancello
Session: Poster Display session 2
Resources:
Abstract
3104 - Novel Blood Based Circulating Tumor Cell Biomarker For Breast Cancer Detection
Presenter: Chun-Yu Liu
Session: Poster Display session 2
Resources:
Abstract
4631 - Multi-Gene Prognostic Signatures and Prediction of Pathological Complete Response of ER-Positive HER2-Negative Breast Cancer Patients to Neo-Adjuvant Chemotherapy
Presenter: Claudia Mazo
Session: Poster Display session 2
Resources:
Abstract
4632 - Impact of menopause status on breast cancer outcomes and amenorrhea incidence during adjuvant tailored dose dense chemotherapy
Presenter: Andri Papakonstantinou
Session: Poster Display session 2
Resources:
Abstract