U.S., Jan. 15 -- ClinicalTrials.gov registry received information related to the study (NCT07341503) titled 'The Sleep After Breast Cancer (ABC) Study - Examining Sleep Changes and Biomarkers Among Breast Cancer Patients' on Sept. 18, 2025.

Brief Summary: This study is being done to learn more about breast cancer patients' experiences with sleep changes during cancer treatment, identify possible reasons for poor sleep quality, and to find out how stress, social support, and living environment affect sleep.

Study Start Date: Aug. 18, 2025

Study Type: OBSERVATIONAL

Condition: Anatomic Stage I Breast Cancer AJCC v8 Anatomic Stage II Breast Cancer AJCC v8 Anatomic Stage III Breast Cancer AJCC v8 Breast Carcinoma Hormone Receptor-Positive B...