No increase of breast cancer incidence in Japanese women who received hormone replacement therapy: overview of a case-control study of breast cancer risk in Japan

Sendo, Toshiaki; Sano, Muneo; Komoike, Yoshifumi; Sonoo, Hiroshi; Honjyo, Hideo; Ochiai, Kazunori; Kobayashi, Tadashi; Aogi, Kenjiro; Sato, Nobuaki; Sawai, Shujiro; Miyoshi, Yasuo; Takeuchi, Masahiro; Takashima, Shigemitsu

doi:10.1007/s10147-008-0794-y

Cited by 7 publications

(9 citation statements)

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“…It has been said that a lower age at menarche and a higher age at menopause can influence the risk of developing breast cancer [17,18]. Maybe the fact that hormone replacement therapy is not used in our area plays a role in the present results [2,19]. The results also show an increase in the risk of breast cancer in women who deliver their first child at age less than 20.51 years (not significant).…”

Section: Discussionsupporting

confidence: 73%

Modifiable Risk of Breast Cancer in Northeast Iran: Hope for the Future. A Case-Control Study

Besharat²,

Torkjazi³

et al. 2011

Breast Care

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Background: Breast cancer is the most common cancer in women. Its prevalence is increasing annually by 2%. The determination of modifiable risk factors has been the subject of various studies. The aim of this study was to determine risk factors of breast cancer in women in Golestan Province. Patients and Methods: This case-control study was conducted among women with breast cancer recorded in the cancer registry system between 2004 and 2006 (n = 134), and their agematched healthy neighbors (n = 133). Data were statistically analyzed. Results: Age at marriage, menarche and pregnancy, breast feeding, positive family history, marital status, and educational level were not significantly correlated with risk of breast cancer, but age at menopause (< 46.6 years) was significantly correlated (95% confidence interval 1.15–7.37; p = 0.021). Live births, still births, and infant deaths were not significantly different between the 2 groups. For other variables, such as smoking history, no odds ratio was calculated. Conclusion: Results show that there is no significant correlation between variables and risk of breast cancer in our population, except for age at menopause. A large cohort study is recommended.

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Section: Discussionsupporting

confidence: 73%

Modifiable Risk of Breast Cancer in Northeast Iran: Hope for the Future. A Case-Control Study

Besharat²,

Torkjazi³

et al. 2011

Breast Care

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“…Hormone replacement therapy (HRT) increases the risk of breast cancer [34,35], even though decreases in breast cancer incidence rates were observed shortly after the publication in 2002 of a report on the association of use of HRT and breast cancer [36]. HRT is not frequently used by Asian women [37,38], and one case-control study showed no increase in breast cancer incidence in a population of Asian women who received HRT [39].…”

Section: Discussionmentioning

confidence: 98%

Recent trends and patterns in breast cancer incidence among Eastern and Southeastern Asian women

Shin

Joubert

Boniol

et al. 2010

Cancer Causes Control

133

119

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Breast cancer incidence is expected to continue to increase for the next 10 years in Asia and may approach rates reported among Asian-Americans. The number and mean age of breast cancer cases is expected to increase as the female Asian population ages, the prevalence of certain risk factors changes (early menarche, late menopause, low parity, late age at first live birth, and low prevalence of breastfeeding), and as Asian countries introduce mass screening programs.

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“…However, an association of oral contraceptive pill (OC) use or hormone replacement therapy (HRT) with breast cancer risk has been inconsistent between studies: an increased risk among women with a history of OC use was reported in a Taiwanese study (Chie et al, 1998) and with HRT use in a Singaporean study , although no association with HRT use was found among women in Japan (Saeki et al, 2008;Kawai et al, 2010), or Thailand (Ratanawichitrasin et al, 2002). Although it is likely that HRT is a risk factor for breast cancer in Asian women, as in women from other countries (Fournier et al, 2005;Chlebowski et al, 2013), in countries that have limited resources and research funding, ecologic and cross-sectional studies may assist with risk stratification (Hoel et al, 1983;Koo et al, 1997;Zhang et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Differences in Incidence, Mortality and Survival of Breast Cancer by Regions and Countries in Asia and Contributing Factors

Kim¹,

Yoo

Goodman

2015

Asian Pacific Journal of Cancer Prevention

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No increase of breast cancer incidence in Japanese women who received hormone replacement therapy: overview of a case-control study of breast cancer risk in Japan

Cited by 7 publications

References 0 publications

Modifiable Risk of Breast Cancer in Northeast Iran: Hope for the Future. A Case-Control Study

Modifiable Risk of Breast Cancer in Northeast Iran: Hope for the Future. A Case-Control Study

Recent trends and patterns in breast cancer incidence among Eastern and Southeastern Asian women

Differences in Incidence, Mortality and Survival of Breast Cancer by Regions and Countries in Asia and Contributing Factors

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