Table 2 Item location and centralised threshold values for the set of eight items with five response categories. Entire sample of students 11, 13 and 15 years old. The lower the item location value, the more severe symptom
Item | Location | Threshold 1 | Threshold 2 | Threshold 3 | Threshold 4 | |
|---|---|---|---|---|---|---|
It 1 | Headache | 0.023415 | −0.786540 | − 0.161090 | 0.130786 | 0.816848 |
It 2 | Stomach-ache | −0.230490 | − 0.749190 | − 0.094010 | −0.283000 | 1.126203 |
It 3 | Backache | −0.140470 | −0.023660 | 0.062261 | −0.123770 | 0.085168 |
It 4 | Feeling low | −0.085780 | −0.732560 | 0.000632 | 0.059639 | 0.672292 |
It 5 | Irritability or bad temper | 0.482598 | −1.376570 | −0.376840 | 0.260856 | 1.492549 |
It 6 | Feeling nervous | 0.025897 | −1.003510 | − 0.264530 | 0.253783 | 1.014259 |
It 7 | Difficulties in getting to sleep | 0.271704 | −0.242570 | 0.008973 | 0.143810 | 0.089783 |
It 8 | Feeling dizzy | −0.346880 | − 0.419110 | 0.244419 | 0.104895 | 0.069796 |