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Table 4 Cohen’s kappa for selected items of HBSC questionnaire by sex, grade and residence

From: Test–retest reliability of selected HBSC items in Vietnam: well-being, physical and sedentary activities, and eating behaviours

Variables ALL (n = 410) Boys (n = 165) Girls (n = 245) 6 (n = 77) 7 (n = 110) 8 (n = 115) 9 (n = 108) Urban (n = 222) Rural (n = 188)
Cohen’s Kappa Cohen’s Kappa Cohen’s Kappa Cohen’s Kappa Cohen’s Kappa Cohen’s Kappa Cohen’s Kappa Cohen’s Kappa Cohen’s Kappa
Health
 Self-Rated Health 0.67** 0.56** 0.73** 0.73** 0.65** 0.61** 0.66** 0.63** 0.71**
 Life Satisfaction 0.77** 0.70** 0.81** 0.79** 0.80** 0.76** 0.72** 0.80** 0.73**
Health complaints
 Headache 0.35** 0.37** 0.33** 0.36* 0.51** 0.31* 0.23* 0.40** 0.29**
 Stomach ache 0.47** 0.58** 0.41** 0.58** 0.49** 0.53** 0.34** 0.51** 0.42**
 Backache 0.35** 0.37** 0.34** 0.29* 0.39** 0.37** 0.34** 0.42** 0.25*
 Feeling low 0.40** 0.45** 0.37** 0.35* 0.50** 0.37** 0.36** 0.43** 0.37**
 Irritability 0.40** 0.41** 0.39** 0.26 0.39** 0.44** 0.44** 0.41** 0.40**
 Nervous 0.35** 0.24* 0.40** 0.37* 0.34* 0.29* 0.39** 0.41** 0.27**
 Sleep difficulties 0.43** 0.34** 0.48** 0.36* 0.37** 0.51** 0.47** 0.42** 0.42**
 Feeling dizzy 0.33** 0.10 0.42** 0.42** 0.25* 0.33* 0.34** 0.28** 0.40**
Physical activity
 MVPA 0.46** 0.46** 0.37** 0.31* 0.53** 0.65** 0.36** 0.37** 0.55**
 VPA 0.42** 0.43** 0.22* 0.31* 0.43** 0.31* 0.51** 0.30** 0.56**
Screen-time
 Gaming 0.50** 0.48** 0.51** 0.67** 0.46** 0.45** 0.49** 0.51** 0.47**
 Social media 0.53** 0.41** 0.55** 0.31* 0.45** 0.46** 0.64** 0.53** 0.53**
 Internet Videos 0.52** 0.46** 0.53** 0.53** 0.48** 0.52** 0.50** 0.45** 0.60**
 TV, DVD 0.42** 0.49** 0.38** 0.49** 0.50** 0.31* 0.44** 0.39** 0.46**
Eating behaviour
 Breakfast 0.57** 0.57** 0.57** 0.42** 0.52** 0.65** 0.64** 0.63** 0.50**
 Fruit 0.46** 0.39** 0.50** 0.41** 0.46** 0.40** 0.53** 0.46** 0.46**
 Vegetable 0.50** 0.46** 0.53** 0.48** 0.54** 0.53** 0.43** 0.55** 0.44**
 Sweets 0.38** 0.22* 0.44** -0.05 0.45** 0.35** 0.39** 0.29** 0.44**
 Soft-Drinks 0.43** 0.35** 0.48** 0.26* 0.46** 0.52** 0.37** 0.45** 0.39**
  1. *p < 0.05, **p < 0.001