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Table 1 Characteristics of subjects

From: How can waist circumference predict the body composition?

   Mean (SD) Mean (SD) Mean (SD) Mean (SD) Mean (SD) P for trend
  Age (years) -39 40-49 50-59 60-69 70-  
Men n 1360 2768 3328 1891 527  
  VFA (cm2) 100.7*** (49.0) 118.7*** (51.8 ) 125.6*** (53.9) 127.2*** (56.9) 128.6*** (57.4) <0.001
  SFA (cm2) 146.4 (71.2) 144.3*** (63.7) 129.0*** (50.8) 117.8*** (44.4) 120.6*** (45.0) <0.001
  Waist circumference (cm) 85.9*** (10.0) 87.0*** (9.2 ) 86.4*** (8.4) 85.0 (8.2) 85.3 (8.8) <0.001
  BMI (kg/m2) 24.3*** (3.5) 24.4*** (3.3) 23.9*** (2.8) 23.6* (2.6 ) 23.5* (2.6) <0.001
  VFA + SFA (cm2) 247.1*** (110.0) 263.0*** (104.6) 254.7* (94.5) 245.0*** (91.9) 249.2** (92.7) 0.007
  VFA/SFA (cm2) 0.7*** (0.3) 0.9*** (0.3) 1.0*** (0.4) 1.1*** (0.4) 1.1*** (0.4) <0.001
  HbA1c (%) 5.6 (0.5) 5.7 (0.7) 5.9** (0.8) 6.0*** (0.8) 6.0 (0.8) <0.001
  Fasting plasma glucose (mg/dL) 100*** (13) 104*** (19) 109*** (23) 110*** (22) 109 (22) <0.001
  Systolic blood pressure (mm Hg) 118*** (11) 120*** (12) 122*** (12) 125* (13) 127 (12) <0.001
  Diastolic blood pressure (mm Hg) 74*** (8) 77*** (9) 79*** (8) 79*** (8) 77*** (8) <0.001
Women n 133 291 595 587 90  
  VFA (cm2) 45.6 (33.1) 61.6 (41.6) 79.5 (41.6) 93.6 (46.7) 97.5 (48.4) <0.001
  SFA (cm2) 152.4 (75.3) 169.6 (79.7) 185.2 (75.6) 187.0 (71.0) 186.5 (70.9) <0.001
  Waist circumference (cm) 78.0 (9.0) 81.1 (10.0) 83.4 (9.3) 84.5 (9.6) 84.5 (8.7) <0.001
  BMI (kg/m2) 21.6 (3.5) 22.7 (3.6) 23.0 (3.4) 23.2 (3.2) 22.8 (3.1) <0.001
  VFA + SFA (cm2) 197.9 (103.5) 231.2 (113.8) 264.7 (108.0) 280.6 (106.6) 284.0 (107.0) <0.001
  VFA/SFA (cm2) 0.3 (0.1) 0.4 (0.2) 0.4 (0.2) 0.5 (0.2) 0.5 (0.2) <0.001
  HbA1c (%) 5.5 (0.3) 5.7 (0.9) 5.8 (0.9) 5.9 (0.6) 6.0 (0.6) <0.001
  Fasting plasma glucose (mg/dL) 93 (7) 98 (22) 101 (24) 103 (17) 105 (18) <0.001
  Systolic blood pressure (mm Hg) 111 (12) 114 (13) 120 (14) 124 (14) 127 (11) <0.001
  Diastolic blood pressure (mm Hg) 69 (9) 71 (8) 75 (9) 76 (9) 75 (7) <0.001
  1. VFA; Visceral fat area, SFA; Subcutaneous fat area, BMI; Body mass index.
  2. *P < 0.05, **P < 0.01, ***P < 0.001 for differences in mean values between men and women in each age group by t-test.
  3. P for trend across the age groups was calculated by a linear regression analysis where the age group was coded as consecutive integers. All p-values for homogeneity among the age groups were also significant at p < 0.001 by analysis of variance (not shown in table).