Table of Contents Author Guidelines Submit a Manuscript
Evidence-Based Complementary and Alternative Medicine
Volume 2014 (2014), Article ID 683570, 9 pages
http://dx.doi.org/10.1155/2014/683570
Research Article

Concurrent Use in Taiwan of Chinese Herbal Medicine Therapies among Hormone Users Aged 55 Years to 79 Years and Its Association with Breast Cancer Risk: A Population-Based Study

1Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, No. 155, Section 2, Linong Street, Beitou District, Taipei City 112, Taiwan
2Department of Chinese Medicine, Taipei City Hospital, Yangming Branch, No. 105, Yusheng Street, Shilin District, Taipei City 111, Taiwan
3Taiwan Association for Traditional Chinese Medicine of Family, 9F., No. 105, Yusheng Street, Shilin District, Taipei City 111, Taiwan
4Department of Chinese Medicine, Taipei City Hospital, Renai Branch, No. 10, Section 4, Ren’ai Road, Da’an District, Taipei City 106, Taiwan

Received 26 January 2014; Revised 22 April 2014; Accepted 10 May 2014; Published 29 May 2014

Academic Editor: Vincent Chung

Copyright © 2014 Yueh-Ting Tsai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. The purpose of the present study was to analyze the concurrent use of Chinese herbal products (CHPs) among women aged 55 to 79 years who had also been prescribed hormonal therapies (HT) and its association with breast cancer risk. Methods. The use, frequency of service, and CHP prescribed among 17,583 HT users were evaluated from a random sample of 1 million beneficiaries from the National Health Insurance Research Database. A logistic regression method was used to identify the factors that were associated with the coprescription of a CHP and HT. Cox proportional hazards regressions were performed to calculate the hazard ratios (HRs) of breast cancer between the TCM nonusers and women who had undergone coadministration of HT and a CHP or CHPs. Results. More than one out of every five study subjects used a CHP concurrently with HT (CHTCHP patients). Shu-Jing-Huo-Xie-Tang was the most commonly used CHP coadministered with HT. In comparison to HT-alone users, the HRs for invasive breast cancer among CHTCHP patients were not significantly increased either in E-alone group or in mixed regimen group. Conclusions. The coadministration of hormone regimen and CHPs did not increase the risk of breast cancer.