Urra-Albornoz Camilo, Cossio Bolaños Marco, Urzua-Alul Luis, Márques de Moraes Anderson, Lázari Evandro, Cossio Bolaños Wilbert, Castelli-Correia de Campos Luis Felipe, Luarte-Rocha Cristian, Gómez-Campos Rossana
Universidad Católica del Maule.
Escuela de Kinesiología. Facultad de Salud. Universidad Santo Tomás.
Nutr Hosp. 2022 Jun 24;39(3):580-587. doi: 10.20960/nh.03636.
Introduction: studying the percentage of body fat (%BF) in children and adolescents is very relevant, since a high level of body fat in childhood and adolescence represents overweight and obesity. Objective: to identify the anthropometric indicators related to %BF and to validate regression equations to predict %BF in children and adolescents using dual-energy X-ray absorptiometry (DXA) as a reference method. Methods: a descriptive study (cross-sectional) was designed in 1126 schoolchildren (588 males and 538 females) from the Maule region (Chile). The age range ranged from 6.0 to 17.9 years. Weight, height, two skinfolds (tricipital and subscapular and waist circumference (WC) were evaluated. Body mass index (BMI), triponderal mass index (TMI), waist height index (WHtR) were calculated. Body fat percentage (%BF) was assessed by DXA scanning. Results: the relationships between Σ (Tricipital + Subscapular), TMI and WHtR with %BF (DXA) ranged from R2 = 52 % to 54 % in men, and from R2 = 41 % to 49 % in women. The equations generated for men were: %BF = 9.775 + [(0.415 * (Tr + SE)] + (35.084 * WHtR) - (0.828 * age), R2 = 70 %, and %BF = 20.720 + [(0.492 * (Tr + SE)] + (0.354 * TMI) - (0.923 * age), R2 = 68 %], and for women: %BF = 8.608 + [(0.291 * (Tr + SE)] + (38.893 * WHtR) - (0.176 * age), R2 = 60 %, and %BF = 16.087 + [(0.306 * (Tr + SE)] + (0.818 * TMI) - (0.300 * age), R2 = 59 %. Conclusion: this study showed that the sum of tricipital and subscapular skinfolds, IP and WHtR are adequate predictors of %BF. These indicators allowed the development of two regression equations acceptable in terms of precision and accuracy to predict %BF in children and adolescents of both sexes.
研究儿童和青少年的体脂百分比（%BF）非常重要，因为儿童期和青少年期的高水平体脂代表超重和肥胖。目的：确定与%BF相关的人体测量指标，并验证以双能X线吸收法（DXA）为参考方法预测儿童和青少年%BF的回归方程。方法：对来自智利马乌莱地区的1126名学童（588名男性和538名女性）进行了一项描述性（横断面）研究。年龄范围为6.0至17.9岁。评估了体重﹑身高﹑两个皮褶厚度（肱三头肌和肩胛下）和腰围（WC）。计算了体重指数（BMI）﹑三 ponderal质量指数（TMI）﹑腰高指数（WHtR）。通过DXA扫描评估体脂百分比（%BF）。结果：男性中，Σ（肱三头肌+肩胛下）、TMI和WHtR与%BF（DXA）之间的关系，R2范围为52%至54%；女性中，R2范围为41%至49%。为男性生成的方程为：%BF = 9.775 + [(0.415 * (Tr + SE)] + (35.084 * WHtR) - (0.828 *年龄) , R2 = 70%，以及%BF = 20.720 + [(0.492 * (Tr + SE)] + (0.354 * TMI) - (0.923 *年龄) , R2 = 68%]；女性的方程为：%BF = 8.608 + [(0.291 * (Tr + SE)] + (38.893 * WHtR) - (0.176 *年龄) , R2 = 60%，以及%BF = 16.087 + [(0.306 * (Tr + SE)] + (0.818 * TMI) - (0.300 *年龄) , R2 = 59%。结论：本研究表明，肱三头肌和肩胛下皮褶厚度之和、IP和WHtR是%BF的充分预测指标。这些指标使得能够开发出两个在精度和准确性方面可接受的回归方程，用于预测两性儿童和青少年的%BF。
