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.