A case-control study of breast cancer risk factors in 7,663 women in Malaysia

Tan, Min Min and Ho, Weang Kee and Yoon, Sook Yee and Mariapun, Shivaani and Hasan, Siti Norhidayu and Lee, Daphne Shin Chi and Hassan, Tiara and Lee, Sheau Yee and Phuah, Sze Yee and Sivanandan, Kavitta and Ng, Patsy Pei Sze and Rajaram, Nadia and Jaganathan, Maheswari and Jamaris, Suniza and Islam, Tania and Rahmat, Kartini and Fadzli, Farhana and Vijayananthan, Anushya and Rajadurai, Pathmanathan and See, Mee Hong and Thong, Meow Keong and Mohd Taib, Nur Aishah and Yip, Cheng Har and Teo, Soo Hwang (2018) A case-control study of breast cancer risk factors in 7,663 women in Malaysia. PLoS ONE, 13 (9). e0203469. ISSN 1932-6203

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Official URL: https://doi.org/10.1371/journal.pone.0203469

Abstract

Background Breast cancer risk factors have been examined extensively in Western setting and more developed Asian cities/countries. However, there are limited data on developing Asian countries. The purpose of this study was to examine breast cancer risk factors and the change of selected risk factors across birth cohorts in Malaysian women. Methods An unmatched hospital based case-control study was conducted from October 2002 to December 2016 in Selangor, Malaysia. A total of 3,683 cases and 3,980 controls were included in this study. Unconditional logistic regressions, adjusted for potential confounding factors, were conducted. The breast cancer risk factors were compared across four birth cohorts by ethnicity. Results Ever breastfed, longer breastfeeding duration, a higher soymilk and soy product intake, and a higher level of physical activity were associated with lower risk of breast cancer. Chinese had the lowest breastfeeding rate, shortest breastfeeding duration, lowest parity and highest age of first full term pregnancy. Conclusions Our study shows that breastfeeding, soy intake and physical activity are modifiable risk factors for breast cancer. With the increasing incidence of breast cancer there is an urgent need to educate the women about lifestyle intervention they can take to reduce their breast cancer risk.

Item Type: Article
Uncontrolled Keywords: adult; aged; breast cancer; breast feeding; cancer risk; case control study; Chinese; controlled study; female; hospital based case control study; human; major clinical study; Malaysian; maternal age; middle aged; parity; physical activity; soy food; soybean milk
Subjects: R Medicine
Divisions: Faculty of Medicine
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 27 Feb 2019 03:40
Last Modified: 27 Feb 2019 03:40
URI: http://eprints.um.edu.my/id/eprint/20530

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