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Table 4 The changes of BMI over time vary with income for selected age groups

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

Male Income 1991 1993 1997 2000 2004 2006 2009 2011 ∆(%)
1946–1950 low 21.28 21.64 21.68 22.55 22.25 22.84 23.63 24.25 13.95
  middle 22.25 22.26 22.53 22.50 22.57 22.49 22.44 23.37 5.03
  high 22.10 22.77 22.52 23.26 23.47 22.90 23.40 23.01 4.13
1951–1955 low 21.42 21.89 22.17 22.22 22.38 22.03 23.38 23.11 7.87
  middle 22.02 22.04 22.39 22.78 22.51 22.31 22.63 22.49 2.12
  high 22.21 22.60 23.26 23.21 23.88 23.72 23.57 23.72 6.8
1956–1960 low 21.25 21.60 21.72 21.75 22.26 22.14 23.43 23.80 12
  middle 21.80 21.95 22.47 22.69 22.39 23.31 22.73 23.05 5.73
  high 22.61 22.00 22.47 23.47 24.42 23.88 23.92 23.95 5.89
1961–1965 low 21.19 21.64 21.58 21.42 22.47 22.68 23.88 24.87 17.38
  middle 21.38 21.48 22.21 22.79 22.68 23.55 23.30 22.69 6.1
  high 21.56 21.61 22.61 23.61 23.58 23.26 24.14 24.29 12.67
1966–1973 low 20.49 21.04 21.07 21.77 21.62 21.26 22.78 24.55 19.82
  middle 20.90 20.83 21.61 21.81 22.73 22.14 22.58 22.94 9.79
  high 20.42 21.25 22.31 22.64 23.11 23.13 23.31 23.46 14.87
Female income 1991 1993 1997 2000 2004 2006 2009 2011 ∆(%)
1946–1950 low 22.33 22.32 22.08 22.61 22.98 22.55 23.02 23.26 4.17
middle 22.70 23.18 23.00 23.51 23.12 23.62 23.90 24.39 7.47
high 22.82 23.11 23.66 23.72 24.24 24.07 23.72 23.51 3.03
1951–1955 low 21.78 21.83 22.23 22.86 23.26 23.46 23.40 23.82 9.35
middle 21.96 22.05 22.68 23.07 23.08 23.44 23.53 23.30 6.14
high 22.26 22.58 22.95 23.41 23.65 23.72 24.02 23.89 7.33
1956–1960 low 21.77 21.97 22.52 23.08 23.50 24.06 24.07 24.56 12.82
middle 22.00 22.31 22.88 23.61 23.39 24.08 24.68 24.48 11.28
high 22.01 22.24 22.94 23.84 24.17 24.01 24.24 24.41 10.88
1961–1965 low 21.02 21.25 22.20 22.78 22.93 23.56 23.71 24.47 16.37
middle 21.51 21.89 22.50 23.08 23.24 23.14 24.49 25.11 16.76
high 21.19 21.63 21.92 22.99 23.62 23.22 24.02 24.44 15.33
1966–1973 low 21.09 21.11 21.70 22.33 22.83 23.37 23.19 23.70 12.34
middle 20.95 21.00 21.94 22.21 23.11 22.75 23.09 23.51 12.20
high 20.52 20.77 21.79 21.97 23.18 22.21 22.28 23.22 13.16