Age-Dependent Causes of Death among Patients with Breast Cancer Based on Osaka Cancer Registry and Vital Statistics in Japan

Author:

Nagayasu Mayumi12ORCID,Morishima Toshitaka3ORCID,Fujii Makoto1ORCID,Kudo Haruka13,Sobue Tomotaka45ORCID,Ohno Yuko1,Miyashiro Isao3

Affiliation:

1. Division of Health Sciences, Graduate School of Medicine, Osaka University, 1-7 Yamadaoka, Suita 5650871, Japan

2. Department of Nursing, Hyogo Medical University, 1-3-6 Minatojima, Kobe 6508530, Japan

3. Cancer Control Center, Osaka International Cancer Institute, 3-1-69 Otemae, Osaka 5418567, Japan

4. Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita 5650871, Japan

5. Institute for Cancer Control, National Cancer Center Japan, 5-1-1 Tsukiji, Tokyo 1040045, Japan

Abstract

We aimed to clarify the differences in causes of death among patients with breast cancer according to age at diagnosis and years elapsed since diagnosis. Using data from the Osaka Cancer Registry and Vital Statistics databases, 40,690 female patients diagnosed with primary breast cancer between 1985 and 2006 were included in this study. The statistics on all deaths between 1985 to 2016 were collected, and the observation period was 10 years (2006–2016). Mortality hazards according to age at diagnosis and years elapsed since diagnosis were estimated using a flexible parametric estimation. Of the 40,690 patients, 13,676 (34%) died from all-cause death, and the 10-year survival rate was 65.74% (95% confidence interval: 65.28–66.21). The proportions of deaths were 10,531 (77%) from breast cancer, 1048 (8%) from other cancers, and 2097 (15%) from non-cancer causes. The mortality hazard for deaths from breast cancer was initially high and then declined, whereas that for deaths from other cancers and non-cancer causes was initially low and then increased. The more likely causes of death 5 years after breast cancer diagnosis were other cancers or non-cancer causes among patients aged ≥70 years.

Funder

Ministry of Health, Labour and Welfare Sciences Research Grants

Japan Society for the Promotion of Science

Publisher

MDPI AG

Subject

Health Information Management,Health Informatics,Health Policy,Leadership and Management

Reference37 articles.

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2. Ministry of Health (2023, January 24). Labour and Welfare Number of Deaths, Death Rates (Per 100,000 Population) and Composition Rates by Cause of Death by Sex (Up to 10th Place), Available online: https://www.mhlw.go.jp/toukei/saikin/hw/jinkou/kakutei21/dl/10_h6.pdf.

3. National Cancer Center, Japan (2023, January 24). Vital Statistics in Japan. Available online: https://ganjoho.jp/reg_stat/index.html.

4. Ministry of Health, Labour and Welfare (2023, January 24). Number of Deaths and Death Rates by Sex, by Simple Cause of Death Classification (Per 100,000 Population), Available online: https://www.mhlw.go.jp/toukei/saikin/hw/jinkou/kakutei21/dl/11_h7.pdf.

5. Updated trends in cancer in Japan: Incidence in 1985–2015 and mortality in 1958–2018-A sign of decrease in cancer incidence;Katanoda;J. Epidemiol.,2021

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