Assessment of quality of life and safety in postmenopausal breast cancer patients receiving letrozole as an early adjuvant treatment

Yongsik Jung, Soo Jung Lee, Juneyoung Lee, Woo Chul Noh, Seok Jin Nam, Byeong Woo Park, Young Tae Bae, Sung Soo Kang, Heung Kyu Park, Jung Han Yoon, Je Ryong Kim, Se Hun Cho, Lee Su Kim, Byung In Moon, Sung Hoo Jung, Chol Wan Lim, Sung Yong Kim, Ho Yong Park, Jeongyoon Song, Kwang Man LeeSung Hwan Park, Joon Jeong, Hae Lin Park, Sung Won Kim, Beom Seok Kwak, Sun Hee Kang, Young Up Cho, Geum Hee Gwak, Yong Lae Park, Sang Wook Kim, Sehwan Han

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)


    Purpose: There are few reports from Asian countries about the long-term results of aromatase inhibitor adjuvant treatment for breast cancer. This observational study aimed to evaluate the long-term effects of letrozole in postmenopausal Korean women with operable breast cancer. Methods: Self-reported quality of life (QoL) scores were serially assessed for 3 years during adjuvant letrozole treatment using the Korean version of the Functional Assessment of Cancer Therapy-Breast questionnaires (version 3). Changes in bone mineral density (BMD) and serum cholesterol levels were also examined. Results: All 897 patients received the documented informed consent form and completed a baseline questionnaire before treatment. Adjuvant chemotherapy was administered to 684 (76.3%) subjects, and 410 (45.7%) and 396 (44.1%) patients had stage I and II breast cancer, respectively. Each patient completed questionnaires at 3, 6, 12, 18, 24, 30, and 36 months after enrollment. Of 897 patients, 749 (83.5%) completed the study. The dropout rate was 16.5%. The serial trial outcome index, the sum of the physical and functional well-being subscales, increased gradually and significantly from baseline during letrozole treatment (p< 0.001). The mean serum cholesterol level increased significantly from 199 to 205 after 36 months (p= 0.042). The mean BMD significantly decreased from –0.39 at baseline to –0.87 after 36 months (p< 0.001). Conclusion: QoL gradually improved during letrozole treatment. BMD and serum cholesterol level changes were similar to those in Western countries, indicating that adjuvant letrozole treatment is well tolerated in Korean women, with minimal ethnic variation.

    Original languageEnglish
    Pages (from-to)182-189
    Number of pages8
    JournalJournal of Breast Cancer
    Issue number2
    Publication statusPublished - 2018 Jun

    Bibliographical note

    Publisher Copyright:
    © 2018 Korean Breast Cancer Society. All rights reserved.


    • Breast neoplasms
    • Letrozole
    • Quality of life
    • Treatment

    ASJC Scopus subject areas

    • Oncology
    • Cancer Research


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