Table 2 Item means, variance and distance between item thresholds for the GHQ-12
From: A Rasch and confirmatory factor analysis of the General Health Questionnaire (GHQ) - 12
Item: | Mean | Variance | Distance between item thresholds: | ||
|---|---|---|---|---|---|
Positive | 1 | 2 | 3 | ||
Q1 | 1.37 | 0.438 | -4.37 | 5.20 | 2.71 |
Q3 | 1.28 | 0.463 | -4.05 | 5.09 | 1.97 |
Q4 | 1.14 | 0.287 | -4.92 | 6.39 | 1.98 |
Q7 | 1.51 | 0.566 | -3.73 | 4.37 | 2.45 |
Q8 | 1.12 | 0.277 | -4.91 | 6.31 | 2.11 |
Q12 | 1.20 | 0.405 | -4.23 | 5.45 | 1.79 |
Negative | |||||
Q2 | 1.00 | 0.686 | -2.60 | 2.90 | 2.00 |
Q5 | 1.22 | 0.650 | -2.91 | 2.87 | 2.99 |
Q6 | 0.95 | 0.546 | -3.11 | 3.61 | 2.12 |
Q9 | 1.12 | 0.790 | -2.29 | 2.09 | 2.69 |
Q10 | 0.84 | 0.696 | -2.28 | 2.27 | 2.30 |
Q11 | 0.24 | 0.492 | 2.46 | -6.11 | 4.84 |
Q11* | 0.14 | 0.166 | -1.28 | 2.56 | |