Incidence, Mortality and Survival Analysis of Epithelial Ovarian Cancer in Brunei Darussalam

Document Type : Research Articles

Authors

1 Faculty of Science, Universiti Brunei Darussalam, Jln Tungku Link, Brunei Darussalam.

2 Institute of Applied Data Analytics, Universiti Brunei Darussalam, Jln Tungku Link, Brunei Darussalam.

3 NCD Prevention Unit, Ministry of Health, Commonwealth Drive, Brunei Darussalam.

4 Early Detection & Cancer Prevention Services, Pantai Jerudong Specialist Centre (PJSC), Brunei Darussalam.

5 PAPRSB Institute of Health Sciences, Universiti Brunei Darussalam, Tungku Link Road, Brunei Darussalam.

Abstract

Background: This study provides population-based study of cancer incidence, mortality and survival rates for women diagnosed with epithelial ovarian cancer (EOC), and evaluate the prognostic factors of EOC patients survival in Brunei Darussalam. Methods: This is a retrospective  study of patients diagnosed with EOC between 1st January 2007 and 31st December 2017 in Brunei Darussalam. Crude, age-specific, age-standardized incidence and mortality rates per 100,000 women were calculated. Kaplan-Meier method was used to determine the overall 5-years survival rate. Log-rank test was used to examine the differences in survival between groups. The multivariable Cox Proportional Hazard regression models were used to estimate the hazard ratio for overall survival and to identify the prognostic factors. Results: A total of 207 patients were included in the study. The crude incidence and mortality rates were 9.7 and 3.6 per 100,000 respectively while the age-standardized incidence and mortality rates were 11.3 (95% CI: 9.7,12.9) and 4.5 (95% CI: 3.4,5.6) per 100,000 respectively in the period 2007-2017. The overall mean age at diagnosis was 48.4 (standard deviation=15.3) years. The overall survival rates at 1, 3, and 5 years for EOC patients were 79.7%, 69.7%, and 61.4% respectively. Age at diagnosis, cancer stage, and histology were significant prognostic factors for patients’ survival. Older age at diagnosis (≥70 years vs <40 years), regional or advanced stage (vs localized stage) and having undifferentiated or other epithelial ovarian (vs serous carcinoma) were associated with having higher hazard of death. Conclusion: Early detection of disease should be emphasized through public education and  raising awareness to improve survival rates of patients with EOC.

Keywords

Main Subjects


Volume 23, Issue 4
April 2022
Pages 1415-1423
  • Receive Date: 18 January 2022
  • Revise Date: 18 February 2022
  • Accept Date: 16 April 2022
  • First Publish Date: 16 April 2022