Mattiello Rita, Mundstock Eduardo, Ziegelmann Patrícia Klarmann
Programa de Pós-graduação em Epidemiologia, Universidade Federal do Rio Grande do Sul, UFRGS, Porto Alegre, Brazil.
Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil.
Front Nutr. 2022 Jul 6;9:912840. doi: 10.3389/fnut.2022.912840. eCollection 2022.
The present study was designed to estimate phase angle percentile curves for a broad age range of healthy individuals.
This is a cross-sectional study of healthy Brazilian individuals aged five to 80. InBodyS10 was used to assess phase angle. Reference curves were stratified by sex and estimated using Generalized additive models for location, scale, and shape as a continuous function of age. The phase angle determinants analyzed were physical activity, age, BMI, and SES variables.
Data were analyzed from 2,146 individuals, 1,189 (55.2%) of whom were female. In both sexes, the phase angles showed a similar pattern (an increasing trend from childhood to the teenage phase, followed by stabilization during adult ages and a decrease in old adults). In female, the relationship between phase angle and age were associated with BMI and family income. In the male, the relationship between phase angle and age were associated with skin color and family income.
To the best of our knowledge, it is the first attempt to apply the GAMLSS technique to estimate phase angle percentiles in a healthy population covering most of the life cycle. We also showed that there are different phase angle determinants according to sex.
本研究旨在估算广泛年龄范围的健康个体的相位角百分位数曲线。
这是一项对5至80岁健康巴西个体的横断面研究。使用InBodyS10评估相位角。参考曲线按性别分层，并使用广义相加模型进行估计，该模型将位置、尺度和形状作为年龄的连续函数。分析的相位角决定因素包括身体活动、年龄、体重指数和社会经济地位变量。
对2146名个体的数据进行了分析，其中1189名（55.2%）为女性。在两性中，相位角呈现出相似的模式（从儿童期到青少年期呈上升趋势，随后在成年期稳定，在老年人中下降）。在女性中，相位角与年龄之间的关系与体重指数和家庭收入有关。在男性中，相位角与年龄之间的关系与肤色和家庭收入有关。
据我们所知，这是首次尝试应用广义相加模型来估计涵盖大部分生命周期的健康人群的相位角百分位数。我们还表明，根据性别存在不同的相位角决定因素。
