我国中青年男性腹部脂肪分布 CT 定量测量的研究

摘要

Objective To investigate the distribution of abdominal fat in Chinese middle‐aged young men. Methods A total of 34 male subjects were enrolled in this study. All the subjects were divided into two groups according to their BMI :overweight/obesity group (BMI≥25 kg/m2 ) and non overweight/obesity group (BMI< 25 kg/m2 ). With navel as the locating landmark ,area from 11cm above to 8 cm below was scanned by QCT to obtain 20 planes at 11 cm interval. Total fat area (TFA) ,visceral fat area (VFA) and subcutaneous fat area (SFA) were measured and total abdominal fat volume (TTFV) ,total visceral fat volume (TVFV) and total subcutaneous fat volume (TSFV) were calculated. Results VFA gradually increased from lower abdomen to upper abdomen. The highest SFA was at 2 cm and 4 cm below navel for non overweight/obesity group and overweight/obesity group respectively. The SFA gradually decreased with interval increased upward and downward. TFA ,VFA and SFA derived from each plane were significantly correlated with corresponding TTFV (R2 =0.87~0.98) ,TVFV(R2 =0.77~0.97) and TSFV(R2 =0.84~0.96). VFA measured at 4 cm or 5 cm above navel had more significant correlation with TVFV as compared with other plane (R2 = 0.98、0.97). TVFV was associated with WC ,WHR , BMI ,TSFV and TFV ,except HC. Conclusion The distribution of abdominal fat in Chinese middle‐aged young men has special characteristics. VFA at 4 cm or 5 cm above navel has the most significant association with TVFV. TVFV has a more significant association with VFA than with WC ,WHR ,BMI , TTFV and TSFV at any plane.%目的：探讨我国中青年男性腹部脂肪分布特征。方法采用定量C T测量62名男性脐上11 cm至脐下8 cm共20个层面总脂肪面积（TFA）、腹腔内脂肪面积（VFA）、皮下脂肪面积（SFA），并计算总腹部脂肪体积（TTFV）、总腹腔内脂肪体积（TVFV）、总腹部皮下脂肪体积（TSFV）。以BMI 25 kg／m2为界，分为BM I＜25 kg／m2（非超重／肥胖）组和BM I≥25 kg／m2（超重／肥胖）组，各31名，并进行统计分析。结果 VFA从下腹部至上腹部逐渐增加。BMI≥25 kg／m2组和BMI＜25 kg／m2组最大SFA分别位于脐下4 cm和2 cm ，随上、下层面的增加SFA逐渐减小。所有层面TFA、VFA、SFA均与相应的TTFV（R2＝0.87～0.98）、TVFV（R2＝0.77～0.97）、TSFV（R2＝0.84～0.96）相关。VFA在脐上4 cm、5 cm层面与 TVFV 相关性较其他层面更显著（R2＝0.98、0.97）。 TVFV 与 WC、WHR、BMI、TSFV、TTFV有相关性，与臀围（HC）无相关性。结论我国中青年男性腹部脂肪分布具有特征性；VFA在脐上4 cm、5 cm最能代表TVFV ；WC、WHR、BMI、TTFV、TSFV与TVFV的相关性均弱于腹部任意层面V FA。