Quality of Life as a Predictor of Weight Loss in Obese, Early-Stage Breast Cancer Survivors

Linda L. Darga

Morris A. Magnan

Darlene W. Mood

William M. Hryniuk

Nora M. DiLaura

Zora Djuric

weight management, quality of life
ONF 2007, 34(1), 86-92. DOI: 10.1188/07.ONF.86-92

Purpose/Objectives: To investigate whether quality of life (QOL) assessed before weight loss intervention predicts weight loss and, in turn, what the effect of weight loss is on QOL measures after 12 months in early-stage breast cancer survivors.

Design: A clinical trial of a weight loss intervention in breast cancer survivors.

Setting: Communitywide recruitment in Detroit, MI.

Sample: 39 breast cancer survivors (body mass index = 30-44 kg/m2), within three years of initial diagnosis and at least three months after chemotherapy or radiation therapy.

Methods: Participants were randomized to one of three weight loss methods or a control group. The Functional Assessment of Cancer Therapy-Anemia (FACT-An) QOL questionnaire was administered at baseline and after the intervention.

Main Research Variables: Six subscales of the FACT-An and weight change.

Findings: Modest but statistically significant associations were found for the physical and functional subscales of the FACT-An with weight loss for 39 subjects who completed 12 months of the study. Those reporting relatively impaired physical or functional QOL at baseline lost more weight, which accounted for 8%-9% of the weight loss variance beyond that resulting from the diet arm assignment. At 12 months, greater weight loss was associated with significant improvements in overall FACT-An score and in the physical, functional, fatigue, and anemia subscales (p < 0.05).

Conclusions: Relatively low physical function at baseline was not a barrier to weight loss; indeed, it may have been a motivating factor in adherence to the weight loss intervention. Weight loss was associated with improvement in several QOL subscale measures in breast cancer survivors, but the emotional and social subscales were not affected.

Implications for Nursing: Counseling for weight loss that includes recommendations for exercise should not be withheld for patients with relatively low physical functioning.

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