Title: The use of body mass index for measurement of fat mass in children is highly dependant on abdominal fat
Abstract: We examined the relationship between body fat and body mass index (BMI) in a multiethnic population of obese children.BMI z-scores were compared to DEXA measures of whole body composition and regional fat distribution.Fat mass index (FMI) was best predicted by the equation: 1/[(0.159-0.013 × percentile of total abdominal fat) -(0.01 × BMI z-score)], where percentile of abdominal fat ranges from 1 to 5. Predicted FMI had high agreement with FMI measured by DEXA.There were no detectable differences in this relation between different ethnic groups.Both BMI and abdominal fat should be used as a proxy to determine adiposity. ﺍﻷﻃﻔﺎﻝ ﻟﺪ ﺍﻟﺸﺤﻤﻴﺔﺍﻟﻜﺘﻠﺔ ﻟﻘﻴﺎﺱ ﺍﳉﺴﻢ ﻛﺘﻠﺔ ﺐ ﹶ ﹾﺴ ﻣﻨ ﺍﺳﺘﺨﺪﺍﻡ ﺭﻳﻜﻮﺭ ﻛﻠﻮﺩ ﻗﻮﻟﻴﺔ، ﺃﻭﻟﻴﻔﻴـﲑ ﻃﻴﺎﻥ، -ﺩﺑﺎﺱ ﻣﺮﻳﻢ ﺍﻟﺘﺎﺟﻮﺭﻱ، ﻋﺎﺩﻝ ﺇﱃ ﻳﻨﺘﻤﻮﻥ ﺳﻜﺎﻥ ﻣﻦ ﺑﺪﻳﻨﲔ ﺃﻃﻔﺎﻝ ﻟﺪ ﺍﳉﺴﻢ ﻛﺘﻠﺔ ﺐ ﹶ ﹾﺴ ﻭﻣﻨ ﺍﳉﺴﻢ ﺷﺤﻢ ﺑﲔ ﺍﻟﻌﻼﻗﺔ ﺍﻟﺒﺎﺣﺜﻮﻥ ﺩﺭﺱ ﺍﳋﻼﺻـﺔ: ﻋﲆ ﻑ ﱡ ﻟﻠﺘﻌﺮ ﺍﻟﺴﻴﻨﻴﺔ ﺍﻷﺷﻌﺔ ﻻﻣﺘﺼﺎﺹ ﺍﳌﺰﺩﻭﺝ ﺑﺎﻟﻘﻴﺎﺱ ﺍﳉﺴﻢ ﻛﺘﻠﺔ ﳌﻨﺴﺐ Z -ﺃﺣﺮﺍﺯ ﻭﻗﺎﺭﻧﻮﺍ ﻣﺘﻌﺪﺩﺓ.ﺃﻋﺮﺍﻕ ﻛﺘﻠﺔ ﺐ ﹶ ﹾﺴ ﻣﻨ ﻋﲆ ﻑ ﱡ ﻟﻠﺘﻌﺮ ﻣﻌﺎﺩﻟﺔ ﺃﻓﻀﻞ ﺃﻥ ﻀﺢ ﹼ ﻭﺍﺗـ ﺃﺟﺰﺍﺋﻪ.ﳐﺘﻠﻒ ﰲ ﺍﻟﺸﺤﻢ ﺗﻮﺯﻳﻊ ﻭﻋﲆ ﺍﳉﺴﻢ ﻛﺎﻣﻞ ﺗﺮﻛﻴﺐ ﳌﻨﺴﺐ Z ﺣﺮﺯ X 0.01) -ﺍﻟﺒﻄﻦ( ﺷﺤﻢ ﳌﺠﻤﻞ ﺍﳌﺌﻮﻳﺔ ﺍﻟﴩﳛﺔ X 0.013 -0.159)] ﻋﲆ 1 ﺍﻟﺮﻗﻢ ﺗﻘﺴﻴﻢ ﻫﻲ ﺍﳉﺴﻢ ﳌﻨﺴﺐ ﻣﺮﺗﻔﻊ ﺗﻮﺍﻓﻖ ﻭﺟﻮﺩ ﻀﺢ ﹼ ﺍﺗـ ﻭﻗﺪ ﻭ5. 1 ﺑﲔ ﺍﻟﺒﻄﻦ ﻟﺸﺤﻢ ﺍﳌﺌﻮﻳﺔ ﺍﻟﴩﳛﺔ ﻗﻴﻤﺔ ﺗـﺘـﺮﺍﻭﺡ ﺣﻴﺚ ﺍﳉﺴﻢ([