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Table 1 Mean (SE) measured BMI, self-reported BMI, and difference across age and sex groups from cross-sectional surveys in 1995 and 2007-2008 (population-weighted data)

From: Change in bias in self-reported body mass index in Australia between 1995 and 2008 and the evaluation of correction equations

  1995     2007-2008    
Age group (years) N Measured
BMI
Self-reported BMI Difference in BMI* N Measured
BMI
Self-reported BMI Difference in BMI*
Men         
20-29 871 25.22 (0.17) 24.46 (0.16) -0.76 (0.06) 704 25.66 (0.26) 25.30 (0.25) -0.36 (0.07)
30-39 1065 26.63 (0.14) 25.60 (0.13) -1.03 (0.05) 874 27.53 (0.22) 27.04 (0.22) -0.49 (0.06)
40-49 904 27.27 (0.15) 26.09 (0.15) -1.19 (0.06) 940 27.85 (0.22) 27.50 (0.21) -0.36 (0.06)
50-59 731 27.70 (0.17) 26.33 (0.17) -1.37 (0.07) 780 28.57 (0.21) 27.87 (0.21) -0.70 (0.06)
60-69 649 27.77 (0.19) 26.25 (0.17) -1.53 (0.07) 726 28.65 (0.22) 27.70 (0.21) -0.96 (0.08)
70+ 488 27.04 (0.18) 25.16 (0.18) -1.88 (0.08) 543 27.94 (0.25) 26.70 (0.23) -1.24 (0.10)
Overall 4708 26.77 (0.07) 25.59 (0.07) -1.18 (0.03) 4567 27.60 (0.10) 26.99 (0.10) -0.62 (0.03)
Women         
20-29 902 23.70 (0.21) 22.63 (0.17) -1.07 (0.09) 650 24.68 (0.28) 24.17 (0.28) -0.51 (0.07)
30-39 1070 25.13 (0.18) 23.97 (0.17) -1.16 (0.06) 949 25.65 (0.19) 25.06 (0.19) -0.59 (0.06)
40-49 982 26.16 (0.20) 24.93 (0.19) -1.23 (0.06) 930 26.83 (0.22) 26.16 (0.23) -0.67 (0.08)
50-59 760 27.23 (0.21) 25.81 (0.19) -1.41 (0.06) 728 27.44 (0.28) 26.70 (0.27) -0.75 (0.07)
60-69 667 27.32 (0.22) 25.56 (0.21) -1.77 (0.08) 681 27.79 (0.24) 26.85 (0.22) -0.94 (0.08)
70+ 545 26.61 (0.22) 24.26 (0.20) -2.35 (0.09) 636 26.93 (0.28) 25.65 (0.26) -1.28 (0.11)
Overall 4926 25.76 (0.09) 24.36 (0.08) -1.40 (0.03) 4574 26.44 (0.10) 25.70 (0.10) -0.74 (0.03)
  1. * Calculated from self-reported minus measured BMI; therefore, negative values indicate underreporting of BMI.