Introduction
For women with an increased breast cancer risk, reducing excess weight and increasing
physical activity are believed to be important approaches for reducing their risk.
This study tested a weight loss intervention that combined commercially available
technology-based self-monitoring tools with individualized phone calls.
Design
Women were randomized to a weight loss intervention arm (n=36) or a usual care arm
(n=18).
Setting/Participants
Participants were women with a BMI ≥ 27.5 kg/m2 and elevated breast cancer risk recruited from the mammography clinic at the Moores
Cancer Center at the University of California San Diego.
Intervention
Intervention participants used the MyFitnessPal website and phone app to monitor diet
and a Fitbit to monitor physical activity. Participants received 12 standardized coaching
calls with trained counselors over 6 months. Usual care participants received the
U.S. Dietary Guidelines for Americans at baseline and two brief calls over the 6 months.
Main outcome measures
Weight and accelerometer-measured physical activity were assessed at baseline and
6 months. Data were collected in San Diego, CA, from 2012 to 2014 and analyzed in
2015.
Results
Participants (n=54) had a mean age of 59.5 (SD=5.6) years, BMI of 31.9 (SD=3.5), and a mean Gail
Model score of 2.5 (SD=1.4). At 6 months, intervention participants had lost significantly
more weight (4.4 kg vs 0.8 kg, p=0.004) and a greater percentage of starting weight (5.3% vs 1.0%, p=0.005) than usual care participants. Across arms, greater increases in moderate-to-vigorous
physical activity resulted in greater weight loss (p=0.01).
Conclusions
Combining technology-based self-monitoring tools with phone counseling supported weight
loss over 6 months in women at increased risk for breast cancer.
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Article Info
Publication History
Published online: September 01, 2016
Identification
Copyright
© 2016 American Journal of Preventive Medicine. Published by Elsevier Inc. All rights reserved.