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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)