Objective assessment of physical activity during chemotherapy for breast cancer.
TPS6626 Background: Exercise can alleviate side effects of chemotherapy, improve quality of life (QOL), and positively impact disease specific and overall survival. Despite the benefits of physical activity (PA), many patients’ activity levels decrease during chemotherapy. Wearable devices, such as the Fitbit, can provide insight into patterns of activity, and help encourage behavior change. The aims of this study are: 1) determine the feasibility/acceptability of using a Fitbit to measure PA and sleep throughout chemotherapy for breast cancer; 2) describe patterns of PA, sedentary time, and sleep during chemotherapy; 3) explore associations of activity and sleep with QOL. Methods: Non-metastatic breast cancer patients from UCSF and UCSD will be enrolled prior to starting chemotherapy. Eligibility criteria include ability to speak/read English, walk unassisted, and access to internet or Fitbit compatible smart phone. Patients sign informed consent, receive a Fitbit Charge HR and guidance on how to use the device. Patients are instructed to wear the Fitbit throughout their adjuvant or neoadjuvant chemotherapy and 6 months post therapy and to sync the Fitbit at least weekly. Patients complete surveys at start, midpoint, end, and 6 months post chemotherapy. Questionnaires include PROMIS anxiety, depression, physical function, fatigue, cognitive function, social roles, comfort with technology and usefulness of the Fitbit. Fitabase database collects minute level activity, sleep, and heart rate. To assess feasibility, we will evaluate if a participant wears FitBit for at least 10 hour per day for ≥ 80% of the days during chemotherapy. We will use mixed effects regression models to assess patterns of PA and associations between activity and QOL. All models will include activity time and Fitbit wear time and will control for the potential confounding effects of age and other demographic or clinical variables. As of February 6 2017, 48 out of a planned 80 patients are enrolled. Acknowledgment: Athena Breast Health Network investigators and patients; support at UCSD by NCI (U54 CA155435-01) and by gift from Carol Vassiliadis and family; NCI grant K07CA181323 to SH; UCSF M Zion Health Fund Award, GBCTB unrestricted funding and TriValley SOCKS to MM. Clinical trial information: NCT03041545.