Childhood Cancer Survival in Brunei Darussalam
Elvynna Leong1,2, Sok King Ong3, Fadzilah Jali1
1Faculty of Science, Universiti Brunei Darussalam, Jln Tungku Link, Brunei Darussalam.
Insights
Childhood cancer survival rates in Brunei Darussalam are 79.4% at 1 year and 70.0% at 5 years. Survival is influenced by cancer type, age at diagnosis, and treatment period, aiding cancer control program planning.
Area of Science:
- Pediatric Oncology
- Cancer Epidemiology
- Public Health
Background:
- Childhood cancer survival rates in Brunei Darussalam are not well-established.
- Understanding survival factors is crucial for improving outcomes in pediatric cancer patients.
Purpose of the Study:
- To determine overall survival rates for children and adolescents (0-19 years) diagnosed with cancer in Brunei Darussalam.
- To identify factors associated with childhood cancer survival.
Main Methods:
- Analysis of 263 de-identified childhood cancer cases from 2002-2017 using a population-based cancer registry.
- Kaplan-Meier method for overall survival estimation.
- Log-rank and Cox Proportional Hazard (PH) regression analyses to identify significant survival factors.
Main Results:
- Overall 1-, 5-, and 10-year survival rates were 79.4%, 70.0%, and 68.8%, respectively.
- Malignant epithelial neoplasms had the highest 5-year survival (84.2%), while CNS tumors had the lowest (44.1%).
- Lymphomas, gonadal/germ cell neoplasms, malignant epithelial neoplasms, younger age groups, and earlier diagnosis periods were associated with lower mortality hazard.
Conclusions:
- Establishes baseline childhood cancer survival data for Brunei Darussalam.
- Provides evidence for targeted cancer control strategies, including surveillance, screening, and treatment.
- Aims to improve childhood cancer survival rates through informed program planning.
Background:
This study aims to determine the survival rates for children and adolescents aged 0-19 years diagnosed with childhood cancer and to evaluate the associated factors for childhood cancer survival in Brunei Darussalam.
Methods:
The analysis was based on de-identified data of 263 childhood cancer for the period 2002 to 2017 retrieved from a population-based cancer registry. Overall survival was estimated using the Kaplan-Meier method. Univariate analysis, using the log-rank test, was used to examine the differences in survival between groups. Multivariate analysis, using the Cox Proportional Hazard (PH) regression model, was used to estimate the hazard ratios (HRs) and select the significant associated factors for childhood cancer patients' survival.
Results:
The overall 1-, 5- and 10-year survival rates for all childhood cancers combined were 79.4%, 70.0% and 68.8% respectively. The most common types of cancer were leukemias, malignant epithelial neoplasms, lymphomas and tumours of the central nervous system (CNS). The 5-year survival estimates were highest for malignant epithelial neoplasms (84.2%) while the lowest was tumours of the CNS (44.1%). Log rank tests showed significant differences in childhood cancer patients' survival between tumour types and period of diagnosis. In the Cox PH analysis, the presence of lymphomas, gonodal and germ cell neoplasms, and malignant epithelial neoplasms compared to leukemia; children aged 1-4 and 5-9 years compared to adolescents aged 15-19 years; and periods of diagnosis in 2002-2006 and 2007-2011 compared to 2012-2017 were significantly associated with lower hazard of death in this study.
Conclusion:
This study provides a baseline measurement of childhood cancer survival for monitoring and evaluation of cancer control programmes, to allow planning of cancer control program strategies such as surveillance, screening, and treatment to improve childhood survival rates in Brunei Darussalam.
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