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Table 3 Comparing self-perceptive weight and actual weight status of children and adolescents aged 6–17 years in China using Kappa test and Chi-square test (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)

Self-perceptive weight status

Actual Weight Status

Kappa

χ2

P

Underweight

Normal

Overweight/Obesity

Boys

Underweight

24 (45.28)

80 (17.13)

15 (7.18)

0.2391

134.664

0.000

Normal

28 (52.83)

364 (77.94)

128 (61.24)

   

Overweight/Obesity

1 (1.89)

23 (4.93)

66 (31.58)

   

Girls

Underweight

26 (43.33)

61 (14.52)

13 (8.13)

0.1447

56.761

0.000

Normal

33 (55.00)

 

114 (71.25)

   

Overweight/Obesity

1 (1.67)

40 (9.52)

33 (20.63)

   

Total

Underweight

50 (44.25)

141 (15.90)

28 (7.59)

0.1960

178.343

0.000

Normal

61 (53.98)

683 (77.00)

242 (65.58)

   

Overweight/Obesity

2 (1.77)

63 (7.10)

99 (26.83)

   
  1. Note: The chi-square tests and the Kappa test were used to examine agreement between self-perceived weight status and actual weight status. Value is N (%). Proportions are column percentages. Bold values represent statistically significant (P < 0.05)