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Table 1 General characteristics of adolescents aged 12–18 by gender over time, the CHNS 1991 to 2011ab

From: Trends in urban/rural inequalities in cardiovascular risk bio-markers among Chinese adolescents in two decades of urbanisation: 1991–2011

Variables 1991 1993 1997 2000 2004 2006 2009 2011
Boys (n = 892) (n = 796) (n = 801) (n = 983) (n = 811) (n = 724) (n = 546) (n = 502)
Age (Years) 15.15 (1.75) 14.93 (1.75) 14.98 (1.72) 14.71 (1.72) 15.37 (1.62) 15.35 (1.73) 15.09 (1.76) 14.98 (1.73)
Index 42.07 (15.55) 44.19 (15.43) 49.37 (16.91) 54.59 (16.97) 57.24 (19.60) 59.29 (19.62) 62.61 (18.81) 64.78 (18.85)
Maternal education (years) 3.46 (3.68) 4.16 (3.79) 5.73 (4.03) 6.97 (3.82) 7.30 (3.54) 7.53 (3.67) 7.79 (3.35) 8.25 (3.07)
Log per capita household income 7.64 (0.87) 7.63 (1.13) 7.91 (1.15) 8.08 (1.17) 8.11 (1.57) 8.27 (1.57) 8.68 (1.39) 8.74 (1.72)
Height (cm) 155.66 (11.64) 155.95 (11.80) 156.59 (11.73) 157.39 (11.41) 161.87 (10.30) 161.15 (11.89) 161.43 (10.65) 161.36 (11.43)
Weight (kg) 45.24 (10.63) 45.45 (10.39) 46.21 (10.72) 46.34 (11.23) 50.65 (10.98) 49.77 (11.41) 50.16 (11.43) 51.25 (13.26)
BMI (kg/m2) 18.45 (2.45) 18.44 (2.37) 18.60 (2.55) 18.48 (2.68) 19.16 (2.75) 19.04 (2.73) 19.09 (3.31) 19.44 (3.69)
Waist circumference (cm) 66.28 (7.35) 66.55 (7.57) 66.88 (8.02) 69.42 (9.10) 69.75 (9.40) 69.01 (9.12) 70.34 (12.23)
Systolic blood pressure (mm Hg) 102.39 (13.34) 102.11 (12.66) 103.31 (12.25) 104.11 (12.85) 107.20 (12.52) 104.85 (11.86) 104.82 (11.91) 105.57 (12.45)
Diastolic blood pressure (mm Hg) 66.49 (9.77) 66.63 (9.83) 67.38 (9.19) 67.65 (9.40) 69.94 (9.02) 68.78 (9.35) 69.12 (9.03) 69.86 (8.95)
Girls (n = 833) (n = 776) (n = 737) (n = 886) (n = 726) (n = 638) (n = 487) (n = 445)
Age (Years) 15.04 (1.74) 15.02 (1.74) 14.96 (1.74) 14.81 (1.72) 15.17 (1.67) 15.41 (1.64) 14.99 (1.81) 15.11 (1.64)
Index 42.43 (15.26) 43.80 (15.19) 50.40 (17.62) 55.86 (17.13) 57.10 (19.48) 59.57 (18.71) 63.88 (18.83) 65.47 (18.75)
Maternal education (years) 3.54 (3.60) 4.23 (3.73) 5.50 (4.14) 6.78 (3.93) 7.29 (3.58) 7.47 (3.77) 7.69 (3.66) 7.91 (3.49)
Log per capita household income 7.53 (1.06) 7.56 (1.29) 7.88 (1.12) 8.00 (1.31) 8.07 (1.54) 8.30 (1.41) 8.63 (1.31) 8.62 (1.68)
Height (cm) 151.19 (7.92) 151.94 (7.78) 152.59 (8.11) 153.62 (7.84) 154.96 (8.06) 155.88 (7.76) 155.08 (8.62) 155.61 (8.37)
Weight (kg) 43.40 (8.04) 43.21 (7.91) 43.99 (8.51) 44.35 (8.63) 45.78 (8.66) 45.84 (8.18) 46.00 (9.77) 47.49 (10.22)
BMI (kg/m2) 18.89 (2.62) 18.61 (2.43) 18.75 (2.56) 18.65 (2.74) 18.96 (2.64) 18.80 (2.65) 19.00 (3.00) 19.49 (3.27)
Waist circumference (cm) 65.37 (6.97) 65.29 (7.01) 65.13 (7.31) 66.00 (7.67) 66.09 (6.87) 66.14 (7.84) 68.99 (9.38)
Systolic blood pressure (mm Hg) 100.49 (12.14) 100.78 (10.97) 102.35 (11.92) 102.42 (11.43) 104.53 (10.43) 101.59 (10.33) 102.74 (10.78) 103.61 (9.90)
Diastolic blood pressure (mm Hg) 65.82 (8.91) 66.36 (8.30) 67.61 (9.39) 67.05 (8.75) 68.83 (8.46) 67.36 (7.98) 68.38 (8.66) 67.36 (8.17)
  1. aMean (sd) were presented; sd, standard deviations
  2. bCHNS China Health and Nutrition Survey