Table 2 Correlations between items in GHQ-12 scale, Inter-item reliability
Item 1 | Item 2 | Item 3 | Item 4 | Item 5 | Item 6 | Item 7 | Item 8 | Item 9 | Item 10 | Item 11 | Item 12 | Inter-item Reliabilitya | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Item 1 | 1 | ||||||||||||
Item 2 | 0.46 | 1.00 | 0.497 | ||||||||||
Item 3 | 0.73 | 0.50 | 1.00 | 0.523 | |||||||||
Item 4 | 0.64 | 0.51 | 0.73 | 1.00 | 0.494 | ||||||||
Item 5 | 0.49 | 0.60 | 0.50 | 0.48 | 1.00 | 0.506 | |||||||
Item 6 | -0.70 | -0.39 | -0.70 | -0.56 | -0.38 | 1.00 | 0.524 | ||||||
Item 7 | 0.69 | 0.43 | 0.61 | 0.59 | 0.40 | -0.60 | 1.00 | 0.510 | |||||
Item 8 | 0.51 | 0.41 | 0.50 | 0.62 | 0.37 | -0.49 | 0.56 | 1.00 | 0.503 | ||||
Item 9 | 0.55 | 0.53 | 0.55 | 0.53 | 0.54 | -0.50 | 0.44 | 0.30 | 1.00 | 0.530 | |||
Item 10 | 0.51 | 0.46 | 0.53 | 0.50 | 0.52 | -0.48 | 0.48 | 0.29 | 0.64 | 1.00 | 0.505 | ||
Item 11 | 0.60 | 0.61 | 0.55 | 0.53 | 0.59 | -0.47 | 0.55 | 0.39 | 0.69 | 0.66 | 1.00 | 0.512 | |
Item 12 | 0.71 | 0.48 | 0.63 | 0.56 | 0.44 | -0.62 | 0.69 | 0.41 | 0.57 | 0.43 | 0.53 | 1.00 | 0.504 |