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A comparison of breast cancer survival across different age groups: a multicentric database study in Penang, Malaysia
King Fang Tan, Farzaana Adam, Hasmah Hussin, Noor Mastura Mohd Mujar
Epidemiol Health. 2021;43:e2021038.   Published online May 25, 2021
DOI: https://doi.org/10.4178/epih.e2021038
  • 12,331 View
  • 373 Download
  • 8 Web of Science
  • 8 Crossref
AbstractAbstract AbstractSummary PDF
Abstract
This study compared breast cancer survival and the prognostic factors across different age groups of women in Penang, Malaysia. Data on 2,166 women with breast cancer who had been diagnosed between 2010 and 2014 were extracted from the Penang Breast Cancer Registry and stratified into 3 age groups: young (< 40 years old), middle-aged (40-59 years old), and elderly (≥ 60 years). The overall and relative survival rates were calculated using the life table method, median survival time was calculated using the Kaplan-Meier method, and comparisons between groups were conducted using the log-rank test. Prognostic factors were analyzed using a Cox proportional hazards model. The 5-year overall and breast cancer-specific survival rates for women with breast cancer in Penang were 72.9% and 75.2%, with a mean survival time of 92.5 months and 95.1 months, respectively. The 5-year breast cancer-specific survival rates for young, middle-aged, and elderly women were 74.9%, 77.8%, and 71.4%, respectively, with a mean survival time of 95.7 months, 97.5 months, and 91.2 months. There was a significant difference in breast cancer survival between age groups, with elderly women showing the lowest survival rate, followed by young and middle-aged women. Disease stage was the most prominent prognostic factor for all age groups. Survival rates and prognostic factors differed according to age group. Treatment planning for breast cancer patients should be age-specific to promote better cancer care and survival.
Summary
Key Message
The relationship between breast cancer survival and age at diagnosis has been explored, but information between survival at different age groups remains unclear, in addition to conflicting study results. This multicentre study was conducted to compare breast cancer survival across different age groups in an Asian setting.

Citations

Citations to this article as recorded by  
  • Illuminating the breast cancer survival rates among Southeast Asian women: A systematic review and meta-analysis spanning four decades
    Duc Tran Quang, Thanh Luong Thi, Khanh Nguyen Di, Chi Vu Thi Quynh, Huyen Nguyen Thi Hoa, Quang Phan Ngoc
    Current Problems in Cancer.2024; 48: 101062.     CrossRef
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    European Journal of Oncology Nursing.2023; 63: 102287.     CrossRef
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    Journal of Adolescent and Young Adult Oncology.2023; 12(5): 625.     CrossRef
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Original Articles
A comparison of breast cancer survival among young, middle-aged, and elderly patients in southern Iran using Cox and empirical Bayesian additive hazard models
Samane Nematolahi, Seyyed Mohammad Taghi Ayatollahi
Epidemiol Health. 2017;39:e2017043.   Published online October 16, 2017
DOI: https://doi.org/10.4178/epih.e2017043
  • 10,723 View
  • 205 Download
  • 6 Web of Science
  • 5 Crossref
AbstractAbstract PDF
Abstract
OBJECTIVES
A survival analysis of breast cancer patients in southern Iran according to age has yet to be conducted. This study aimed to quantify the factors contributing to a poor prognosis, using Cox and empirical Bayesian additive hazard (EBAH) models, among young (20-39 years), middle-aged (40-64 years), and elderly (≥ 65 years) women.
METHODS
Data from 1,574 breast cancer patients diagnosed from 2002 to 2012 in the cancer registry of Fars Province (southern Iran) were stratified into 3 age groups. The Kaplan-Meier method was used to estimate the overall survival rates. Cox and EBAH models were applied to each age category, and the Akaike information criterion was used to assess the goodness-of-fit of the 2 hazard models.
RESULTS
As of December 2012, 212 women (13.5%) in our study population had died, of whom 43 were young (15.3%), 134 middle-aged (11.8%), and 35 elderly (22.3%). The 5-year survival probability by age category was 0.83 (standard error [SE], 0.03), 0.88 (SE, 0.01), and 0.75 (SE, 0.04), respectively.
CONCLUSIONS
The Nottingham Prognostic Index was the most effective prognostic factor. The model based on Bayesian methodology performed better with various sample sizes than the Cox model, which is the most widely used method of survival analysis.
Summary

Citations

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  • The health literacy level and its related factors in Iranian women with breast cancer undergoing chemotherapy
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    Frontiers in Public Health.2023;[Epub]     CrossRef
  • sHLA-G as a biomarker for colorectal cancer pathogenesis
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  • Geo-epidemiological reporting and spatial clustering of the 10 most prevalent cancers in Iran
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    Geospatial Health.2021;[Epub]     CrossRef
  • BREAST CANCER IN WESTERN KAZAKHSTAN: INCIDENCE, MORTALITY AND FACTORS ASSOCIATED WITH SURVIVAL
    Marzhan A. Aitmagambetova, Yerbol Zh. Bekmukhambetov, Gaziza A. Smagulova, Anar B. Tulyayeva, Arip K. Koyshybaev, Andrey M. Grjibovski
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Intestinal obstruction: predictor of poor prognosis in colorectal carcinoma?
Mohd Azri Mohd Suan, Wei Leong Tan, Shahrul Aiman Soelar, Ibtisam Ismail, Muhammad Radzi Abu Hassan
Epidemiol Health. 2015;37:e2015017.   Published online March 30, 2015
DOI: https://doi.org/10.4178/epih/e2015017
  • 58,871 View
  • 184 Download
  • 10 Web of Science
  • 13 Crossref
AbstractAbstract PDF
Abstract
OBJECTIVES
The goal of this study was to assess the relationship between intestinal obstruction and the prognosis of colorectal carcinoma.
METHODS
Data pertaining to 4,501 colorectal carcinoma patients were extracted from the national colorectal registry and analysed. Survival analysis was performed using the Kaplan-Meier method. The log-rank test was used to compare the survival rate between patients with intestinal obstruction and those without intestinal obstruction. The p-values<0.05 were considered to indicate statistical significance. Simple Cox proportional hazards regression analysis was used to estimate the crude hazard ratio of mortality from colorectal cancer.
RESULTS
Intestinal obstruction was reported in more than 13% of patients. The 3-year survival rate after treatment was 48.3% (95% confidence interval [CI], 43.9 to 52.8) for patients with intestinal obstruction (n=593) and 54.9% (95% CI, 53.1 to 56.6) for patients without intestinal obstruction (n=3,908). The 5-year survival rate for patients with intestinal obstruction was 37.3% (95% CI, 31.9 to 42.8), which was lower than that of patients without intestinal obstruction (45.6%; 95% CI, 43.5 to 47.7). After adjusting the hazard ratio for other prognostic variables, intestinal obstruction had a statistically significant negative correlation with the survival rate of colorectal cancer patients, with an adjusted hazard ratio of 1.22 (p=0.008).
CONCLUSIONS
The presence of intestinal obstruction is associated with a lower survival rate among colorectal cancer patients.
Summary

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