Kathryn M Ross1,2, Abraham Eastman1, Rena R Wing2. 1. Department of Clinical and Health Psychology, College of Public Health and Health Professions, University of Florida, Gainesville, Florida, USA. 2. Department of Psychiatry and Human Behavior, Warren Alpert Medical School, Brown University and The Miriam Hospital, Providence, Rhode Island, USA.
Abstract
OBJECTIVE: Greater frequency of self-weighing has been associated with greater weight loss in weight management interventions, but little is known regarding the accuracy of self-reported weight data. METHODS: Agreement between objective smart-scale and self-reported weight data was assessed in 74 adults (age = 50.7 years; BMI = 31.2 kg/m2 ) enrolled in a 12-week, Internet-based weight management program. Participants were asked to self-weight daily using a study-provided smart scale and to self-report weights via the study website. RESULTS: There was strong agreement between smart-scale and self-reported weight values (intraclass correlation = 0.982) but only moderate agreement regarding frequency of self-weighing assessed via each method (κ = 0.491; P < 0.0001). Greater self-weighing frequency was associated with greater weight loss across measures (all P < 0.001). Compared with days when participants did both, weights were 0.66 kg higher on days when participants self-weighed via the smart scale but did not self-report weight (8% of days) and 0.58 kg higher on days when they self-reported weight but did not self-weigh via the smart scale (4% of days; all P < 0.0001). CONCLUSIONS: Results suggest that self-reported weight values are similar to smart-scale measurements; however, either method alone may underestimate self-weighing frequency. Furthermore, missing self-weighing data should not be treated as ignorable because weights may be higher than those observed on nonmissing days.
OBJECTIVE: Greater frequency of self-weighing has been associated with greater weight loss in weight management interventions, but little is known regarding the accuracy of self-reported weight data. METHODS: Agreement between objective smart-scale and self-reported weight data was assessed in 74 adults (age = 50.7 years; BMI = 31.2 kg/m2 ) enrolled in a 12-week, Internet-based weight management program. Participants were asked to self-weight daily using a study-provided smart scale and to self-report weights via the study website. RESULTS: There was strong agreement between smart-scale and self-reported weight values (intraclass correlation = 0.982) but only moderate agreement regarding frequency of self-weighing assessed via each method (κ = 0.491; P < 0.0001). Greater self-weighing frequency was associated with greater weight loss across measures (all P < 0.001). Compared with days when participants did both, weights were 0.66 kg higher on days when participants self-weighed via the smart scale but did not self-report weight (8% of days) and 0.58 kg higher on days when they self-reported weight but did not self-weigh via the smart scale (4% of days; all P < 0.0001). CONCLUSIONS: Results suggest that self-reported weight values are similar to smart-scale measurements; however, either method alone may underestimate self-weighing frequency. Furthermore, missing self-weighing data should not be treated as ignorable because weights may be higher than those observed on nonmissing days.
Authors: Yaguang Zheng; Mary Lou Klem; Susan M Sereika; Cynthia A Danford; Linda J Ewing; Lora E Burke Journal: Obesity (Silver Spring) Date: 2014-12-17 Impact factor: 5.002
Authors: Jeffrey J VanWormer; Anna M Martinez; Brian C Martinson; A L Crain; Gretchen A Benson; Daniel L Cosentino; Nicolaas P Pronk Journal: Am J Prev Med Date: 2008-10-31 Impact factor: 5.043
Authors: Dori M Steinberg; Deborah F Tate; Gary G Bennett; Susan Ennett; Carmen Samuel-Hodge; Dianne S Ward Journal: Obesity (Silver Spring) Date: 2013-07-02 Impact factor: 5.002
Authors: Nestor de la Cruz-Muñoz; Luyu Xie; Hallie J Quiroz; Onur C Kutlu; Folefac Atem; Steven E Lipshultz; M Sunil Mathew; Sarah E Messiah Journal: J Am Coll Surg Date: 2022-09-15 Impact factor: 6.532
Authors: Rena R Wing; Mark A Espeland; Deborah F Tate; Letitia H Perdue; Judy Bahnson; Kristen Polzien; Erica F Robichaud; Jessica G LaRose; Amy A Gorin; Cora E Lewis; Elissa Jelalian Journal: Obesity (Silver Spring) Date: 2020-01 Impact factor: 5.002