DEXA法による全脂肪量・全筋量・両下肢全重量と腹部CT臍レベル内臓脂肪断面積との関連  [in Japanese] The Relations of Visceral Fat Area to Body Fat Ratio, Body Muscle Ratio, and Legs Mass Ratio  [in Japanese]

Access this Article

Author(s)

    • 伊藤 健一 Ito Kenichi
    • 神戸大学大学院医学系研究科博士課程前期:北里大学獣医畜産学部畜産学科 Kobe University Graduate School, Master course of Medical Sciences : Department of Physical Therapy, Osaka Prefecture College of Health Sciences
    • 岡部 修一 Okabe Syuichi
    • 北里大学獣医畜産学部畜産学科 Faculty of Zootechny, Kitazato University School of Veterinary Medicine and Zootechny
    • 林 義孝 [他] Hayashi Yoshitaka
    • 大阪府立看護大学医療技術短期大学部理学療法学科 Department of Physical Therapy, Osaka Prefecture College of Health Sciences

Abstract

倫理的な配慮のもとで検査に同意が得られた、通常動務を行う男性会社員43名(23~58歳、平均年令39.7±10.8歳)を被検者とした。体型計測成績とDEXA法による筋量・脂肪量・体重計測成績を基に、腹部CT撮影による臍レベルの内臓脂肪断面積(VisceralFatArea,VFA)や皮下脂肪断面積(Subcutaneous Fat Area, SFA)との関係を、20~30歳代(23名、23~38歳、以下A群)と40~50歳代(20名、41~58歳、以下B群)に分けて検討した。VFAが100cm^2以上の例は13名存在したが、この内8例はBMIが25未満(22台が4例、23台が3例、24.4が1例)の普通体重で、個々のウエスト周囲径は、81.0、81.0、82.0、83.0、84.0、84.4、85.0、88.0cmであった。定説通り、各群ともにウエスト周囲径はVFAと順相関を示した。また、体脂肪率は年齢と順相関を、体重に対する全身の筋量(即ち体筋率)は年齢と逆相関を示した。なお、VFAは年齢と順相関(r=0.582,p<0.001)を認めたが、SVFは年齢と相関を認めなかった。更に、BMI25未満ではVFAと体脂肪率との間にはA群で、より強い順相関を認めた(A群:r=0.664,p<0.01、B群:r=0.518,p<0.05)。また、BMI25未満ではVFAと体筋率との間にもA群で、より強い逆相関を認めた(A群:r=-0.668,p<O.01、B群:r=-0.524,p<0.05)。一方、体重に対する両下肢全重量の比率は年齢と逆相関(r=-0.600,p<0.001)を示し、A群、B群とも全体の検討ではVFAとは逆相関を示した。(A群:r=-0.441,p<0.05、B群:r=-0.671,p<0.01)。これらの結果は、1)中年になっても青壮年時代と体重が変わらないという状態でも、下肢重量の減少と内臓脂肪量の増加という相殺のためであるという症例が存在し得ること、2)年齢を考慮した際には、骨密度計測のために繁用されるDEXA法でも同時にVFAの推定がある程度可能となること、特に体型計測では判然としない範囲を含めた内臓脂肪型肥満症例の発見に有用な手段となることを示唆する。 / The relations of visceral fat area (VFA) or visceral subcutaneous fat area (SFA) evaluated by abdominal CT to body fat mass, body muscle mass, and legs mass evaluated by dual energy X-ray absorptiometry (DEXA), were studied in 43 non-athlete male adults (age : mean±SD = 39.7±10.8yr.) divided by the two groups of Y (n = 23, age : 23-38yr.) and M (n = 20, age : 41-58yr.). The number of cases with measured values more than 100cm^2 of VFA was 13, and that with calculated values less than 25 of BMI was 8 among these cases. Waist circumference showed positive correlations with VFA. Body fat ratio (BFR) and body muscle ratio (BMR) positively and inversely correlated with age, respectively. Though VFA positively correlated with age (r = 0.582, p<0.001), SFA did not correlated with age. VFA positively correlated with BFR (Y : r = 0.664, p<0.01 ; M : r = 0.518, p<0.05), and inversely correlated with BMR (Y : r=-0.668, p<0.01 ; M : r=-0.524, p<0.05). On the other hand, bilateral legs mass divided by body weight inversely correlated with age (r=-0.600, p<0.001) and VFA (M : r=-0.671, p<0.01) respectively. The present study suggested that 1) the case, whose body weight compared with that in younger days does not change because of the counterbalance due to the decrease of legs mass and increase of visceral fat mass, could be present, and 2) it could be possible to estimate the degree of VFA by the proper use of data obtained from DEXA which is routinely used for the diagnosis of osteoporosis, and this method might be useful in the discovery of visceral fat obesity.

The relations of visceral fat area (VFA) or visceral subcutaneous fat area (SFA) evaluated by abdominal CT to body fat mass, body muscle mass, and legs mass evaluated by dual energy X-ray absorptiometry (DEXA), were studied in 43 non-athlete male adults (age : mean±SD = 39.7±10.8yr.) divided by the two groups of Y (n = 23, age : 23-38yr.) and M (n = 20, age : 41-58yr.). The number of cases with measured values more than 100cm^2 of VFA was 13, and that with calculated values less than 25 of BMI was 8 among these cases. Waist circumference showed positive correlations with VFA. Body fat ratio (BFR) and body muscle ratio (BMR) positively and inversely correlated with age, respectively. Though VFA positively correlated with age (r = 0.582, p<0.001), SFA did not correlated with age. VFA positively correlated with BFR (Y : r = 0.664, p<0.01 ; M : r = 0.518, p<0.05), and inversely correlated with BMR (Y : r=-0.668, p<0.01 ; M : r=-0.524, p<0.05). On the other hand, bilateral legs mass divided by body weight inversely correlated with age (r=-0.600, p<0.001) and VFA (M : r=-0.671, p<0.01) respectively. The present study suggested that 1) the case, whose body weight compared with that in younger days does not change because of the counterbalance due to the decrease of legs mass and increase of visceral fat mass, could be present, and 2) it could be possible to estimate the degree of VFA by the proper use of data obtained from DEXA which is routinely used for the diagnosis of osteoporosis, and this method might be useful in the discovery of visceral fat obesity.

Journal

  • 神戸大学医学部保健学科紀要

    神戸大学医学部保健学科紀要 17, 113-120, 2001

    Kobe University

Codes

  • NII Article ID (NAID)
    110004624894
  • NII NACSIS-CAT ID (NCID)
    AN10508836
  • Text Lang
    JPN
  • Article Type
    departmental bulletin paper
  • Journal Type
    大学紀要
  • ISSN
    13413430
  • NDL Article ID
    6104324
  • NDL Source Classification
    ZS7(科学技術--医学)
  • NDL Call No.
    Z19-1832
  • Data Source
    NDL  NII-ELS  IR 
Page Top