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Table 2 The changes of BMI over time vary with education for selected age groups

From: Social disparities in body mass index (BMI) trajectories among Chinese adults in 1991–2011

Male Edu** 1991 1993 1997 2000 2004 2006 2009 2011 Δ(%)*
1946–1950 1 22.64 22.52 23.39 23.65 23.43 23.52 24.78 23.98 5.92
  0 21.68 21.91 22.17 22.59 22.64 22.57 22.88 23.09 6.51
1951–1955 1 22.34 22.66 23.73 24.25 24.01 23.99 24.05 23.68 6.04
  0 21.64 21.89 22.19 22.31 22.61 22.63 23.06 23.38 8.01
1956–1960 1 21.92 22.18 22.66 23.22 23.75 24.14 23.74 23.61 7.73
  0 21.48 21.61 22.06 22.7 22.92 23 23.64 23.91 11.28
1961–1965 1 21.36 21.66 22.72 23.5 23.25 23.35 24.54 24.52 14.82
  0 21.27 21.54 21.81 22.48 23 23.23 23.67 24.04 13.03
1966–1973 1 21.05 21.86 22.27 23.09 23.19 23.24 24.01 24.80 17.82
  0 20.48 20.82 21.32 21.79 22.38 22.48 22.98 23.19 13.22
Female Edu 1991 1993 1997 2000 2004 2006 2009 2011 Δ(%)
1946–1950 1 24.05 24.73 24.39 23.79 24.81 24.94 25.13 24.52 1.95
  0 22.59 22.84 23.05 23.38 23.59 23.46 23.52 23.60 4.47
1951–1955 1 21.57 21.60 22.31 22.82 22.72 22.85 22.24 22.08 2.36
  0 22.11 22.30 22.70 23.20 23.44 23.65 23.82 23.88 8.01
1956–1960 1 21.43 21.59 22.45 22.80 22.50 23.00 23.34 23.71 10.64
  0 22.11 22.37 22.92 23.70 23.90 24.30 24.56 24.66 11.53
1961–1965 1 20.90 21.22 21.90 22.87 22.13 22.15 22.72 24.10 15.31
  0 21.37 21.74 22.29 22.97 23.44 23.58 24.22 24.75 15.82
1966–1973 1 20.21 20.19 21.74 21.93 23.29 23.18 22.08 22.13 9.50
  0 21.08 21.16 21.79 22.24 22.95 22.92 23.02 23.61 12.00
  1. Note:
  2. \( \Delta ={\frac{BMI_{2011}-{BMI}_{1991}}{BMI_{1991}}}^{\ast }100\% \).
  3. * 1 to 2011 BMI growth rate
  4. ** Edu = 1 means more than 9 years of formal education, and Edu = 0 means 9 or less than 9 years of formal education