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Table 2 Comparison of distribution of BMI, self-perceptive weight and BID of children and adolescents aged 6–17 years with different sociological characteristics (N = 1,369, (%))

From: Association of body perception and dietary weight management behaviours among children and adolescents aged 6–17 years in China: cross-sectional study using CHNS (2015)

Characteristics BMI P Self-perceptive weight P BID P
Normal Underweight Overweight/Obesity Normal Underweight Overweight/Obesity Satisfied Desire to be heavier Desire to be thinner
Sex Boys 467(64.06) 53(7.27) 209(28.67) 0.160 520(71.33) 119(16.32) 90(12.35) 0.826 292(40.05) 266(36.49) 171(23.46) 0.317
  Girls 420(65.63) 60(9.38) 160(25.00)   466(72.81) 100(15.63) 74(11.56)   264(41.25) 210(32.81) 166(25.94)  
Gradea Elementary school 557(59.13) 85(9.02) 300(31.85) 0.000 681(72.29) 159(16.88) 102(10.83) 0.129 366(38.85) 356(37.79) 220(23.35) 0.003
Middle school 235(75.32) 24(7.69) 53(16.99)   223(71.47) 47(15.06) 42(13.46)   135(43.27) 93(29.81) 84(26.92)  
Junior school 90(82.57) 4(3.67) 15(13.76)   76(69.72) 13(11.93) 20(18.35)   54(49.54) 23(21.10) 32(29.36)  
Residence Urban 301(64.73) 28(6.02) 136(29.25) 0.065 333(71.61) 62(13.33) 70(15.05) 0.013 223(47.96) 120(25.81) 122(26.24) 0.000
Rural 586(64.82) 85(9.40) 233(25.77)   653(72.23) 157(17.37) 94(10.40)   333(36.84) 356(39.38) 215(23.78)  
Mother’s education levelb Elementary school 131(66.84) 20(10.20) 45(22.96) 0.007 142(72.45) 38(19.39) 16(8.16) 0.008 75(38.27) 71(36.22) 50(25.51) 0.001
Middle school 296(63.52) 47(10.09) 123(26.39)   327(70.17) 82(17.60) 57(12.23)   175(37.55) 191(40.99) 100(21.46)  
Junior school 256(63.21) 19(4.69) 130(32.10)   285(70.37) 51(12.59) 69(17.04)   182(44.94) 109(26.91) 114(28.15)  
Father’s
education levelc
Elementary school 88(66.67) 19(14.39) 25(18.94) 0.000 85(64.39) 36(27.27) 11(8.33) 0.000 47(35.61) 51(38.64) 34(25.76) 0.040
Middle school 278(64.20) 48(11.09) 107(24.71)   308(71.13) 77(17.78) 48(11.09)   169(39.03) 171(39.49) 93(21.48)  
Junior school 266(61.01) 20(4.59) 150(34.40)   318(72.94) 44(10.09) 74(16.97)   186(42.66) 132(30.28) 118(27.06)  
Per capita household income Low 302(67.56) 50(11.19) 95(21.25) 0.000 318(71.14) 92(20.58) 37(8.28) 0.000 174(38.93) 178(39.82) 95(21.25) 0.012
Middle 303(66.45) 40(8.77) 113(24.78)   322(70.61) 79(17.32) 55(12.06)   186(40.79) 161(35.31) 109(23.90)  
High 282(60.52) 23(4.94) 161(34.55)   346(74.25) 48(10.30) 72(15.45)   196(42.06) 137(29.40) 133(28.54)  
Physical activityd No 531(63.98) 79(9.52) 220(26.51) 0.137 585(70.48) 144(17.35) 101(12.17) 0.302 333(40.12) 294(35.42) 203(24.46) 0.627
Regular 345(65.59) 34(6.46) 147(27.95)   388(73.76) 75(14.26) 63(11.98)   221(42.02) 173(32.89) 132(25.10)  
Total   887(64.79) 113(8.26) 369(26.95)   986(71.76) 219(16.15) 164(12.09)   556(40.61) 476(34.77) 337(24.62)  
  1. Note: The chi-square tests were used to examine difference of distribution of BMI self-perceived weight and BID in terms of sex, grade, parental education level, residential area, per capita household income and physical activity. Value is N (%). Proportions are row percentages. a,b,c,d few data missing (grade 6; father’s educational level 368; mother’s educational level 302; physical activity 13)