Table 3

Weighted kappa coefficients for stability of daily TV and VG time between ages 5, 8, 11, and 13

Age 5-8

Age 5-11

Age 5-13

Age 8-11

Age 8-13

Age 11-13


(n = 193 boys, 222 girls)

(n = 171 boys, 211 girls)

(n = 168 boys, 189 girls)

(n = 161 boys, 205 girls)

(n = 158 boys, 185 girls)

(n = 152 boys, 180 girls)


TV Viewing


Boys

0.29** (0.20, 0.38)

0.12* (0.02, 0.22)

0.17* (0.07, 0.27)

0.19* (0.09, 0.28)

0.22** (0.12, 0.32)

0.24** (0.13, 0.36)


Girls

0.34** (0.25, 0.42)

0.21** (0.11, 0.30)

0.09* (-0.01, 0.19)

0.30** (0.22, 0.39)

0.20* (0.11, 0.30)

0.17* (0.07, 0.26)



Video Gaming


Boys

0.14* (0.02, 0.26)

0.05* (-0.01, 0.10)

0.01* (-0.04, 0.07)

0.10* (0.01, 0.19)

0.11* (0.04, 0.19)

0.13* (0.02, 0.25)


Girls

0.34** (0.17, 0.51)

0.09* (0.00, 0.17)

0.08* (-0.01, 0.18)

0.22** (0.11, 0.32)

0.02* (-0.05, 0.10)

0.18* (0.08, 0.29)


Presented as kappa (95% confidence interval)

Landis and Koch (1977) proposed classifications for the interpretation of a weighted kappa value. * slight; ** fair.

Francis et al. International Journal of Behavioral Nutrition and Physical Activity 2011 8:100   doi:10.1186/1479-5868-8-100

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