为何相位角又称「体年龄」?
高端体组成分析仪所提供的「相位角」有时会被称为「体年龄」,这是为什么呢?
研究者收集了1967位年龄18-94岁之间的成人的生物阻抗数据,结果如下:
相位角 (分性别年龄)1
年龄 | 男 (n=832) | 女 (n=1135) | p2 |
18-20y | 7.90±0.47 (6.97, 8.75) [17] | 7.04±0.85 (5.90, 8.91) [20] | 0.001 |
20-29y | 8.02±0.75 (6.83, 9.17) [178] | 6.98± 0.92 (5.64, 8.55) [171] | 0.001 |
30-39y | 8.01± 0.85 (6.64, 9.48) [178] | 6.87±0.84 (5.57, 8.36) [242] | 0.001 |
40-49y | 7.76±0.85 (6.53, 9.00) [121] | 6.91±0.85 (5.57, 8.33) [165] | 0.001 |
50-59y | 7.31±0.89 (6.12, 8.68) [106] | 6.55±0.87 (5.48, 7.96) [205] | 0.001 |
60-69y | 6.96± 1.10 (5.40, 8.88) [111] | 5.97±0.83 (4.69, 7.48) [180] | 0.001 |
≧70y | 6.19± 0.97 (4.77, 8.01) [121] | 5.64±1.02 (4.22, 7.04) [152] | 0.001 |
1 All values are x±SD; 5th and 95th percentiles in parentheses. n values in brackets.
2 t test.
来源: Gonzalez, Maria Cristina & J D Barros, Aluisio & Wang, Jack & Heymsfield, Steven & Pierson, Richard. (2005). Bioelectrical impedance analysis: Population reference values for phase angle by age and sex. The American journal of clinical nutrition. 82. 49-52. 10.1093/ajcn.82.1.49.