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Table 1 Descriptive statistics for all variables, ks01–09 are 9 kidscreen dimensions, N = 723

From: Associations between self-efficacy, bullying and health-related quality of life in a school sample of adolescents: a cross-sectional study

Variables Min Max Mean SD Skewness Kurtosis Alpha
ks01 (Phys well-being) 0 100 65.00 21.25 −0.30 − 0.65 .84
ks02 (Psych well-being) 8 100 75.78 18.25 −0.94 0.69 .89
ks03 (Moods/emotion) 18 100 81.42 14.71 −1.39 2.22 .86
ks04 (Self-perception) 0 100 70.19 20.78 −0.64 −0.25 .82
ks05 (Autonomy) 0 100 68.51 20.73 −0.58 − 0.14 .85
ks06 (Parents-relationship) 8 100 75.75 19.04 −0.80 0.23 .88
ks07 (Financial resources) 0 100 78.53 23.28 −1.13 0.75 .89
ks08 (Peers and social supp) 21 100 73.14 17.07 −0.47 −0.35 .83
ks09 (School environment) 0 100 62.39 19.21 −0.21 − 0.24 .87
Gender (girls = 0, boys = 1) 0 1 0.46 0.50 0.17 −1.98  
Age 12 18 14.6 2.15 0.31 −1.22  
Bullied 0 1 0.13 0.34 2.15 2.64  
Bullying 0 1 0.13 0.34 2.19 2.79  
Self efficacy 1.20 4.00 3.07 0.60 −0.31 −0.38