A Smartphone Application for Personal Assessments of Body Composition and Phenotyping

作者：Farina Gian Luca; Spataro Fabrizio; De Lorenzo Antonino; Lukaski Henry

来源：Sensors, 2016, 16(12): 2163.

DOI：10.3390/s16122163

• body composition assessment
• mobile health
• weight management

Personal assessments of body phenotype can enhance success in weight management but are limited by the lack of availability of practical methods. We describe a novel smart phone application of digital photography (DP) and determine its validity to estimate fat mass (FM). This approach utilizes the percent (%) occupancy of an individual lateral whole-body digital image and regions indicative of adipose accumulation associated with increased risk of cardio-metabolic disease. We measured 117 healthy adults (63 females and 54 males aged 19 to 65 years) with DP and dual X-ray absorptiometry (DXA) and report here the development and validation of this application. Inter-observer variability of the determination of % occupancy was 0.02%. Predicted and reference FM values were significantly related in females (R-2 = 0.949, SEE = 2.83) and males (R-2 = 0.907, SEE = 2.71). Differences between predicted and measured FM values were small (0.02 kg, p = 0.96 and 0.07 kg, p = 0.96) for females and males, respectively. No significant bias was found; limits of agreement ranged from 5.6 to -5.4 kg for females and from 5.6 to -5.7 kg for males. These promising results indicate that DP is a practical and valid method for personal body composition assessments.

• 出版日期2016-12