Table S1.
Instruments with which the predictor variables (wave 2) were measured
| Predictor variable | Example item | Number of items | Item source | Internal consistency (Cronbach’s α) |
|---|---|---|---|---|
| Dysfunctional stress coping strategies | If other children put me under pressure or I am under pressure in school … Examples: … I would like to pretend to be ill. … I complain about everything. |
5 | SVF-KJ1 | 0.73 |
| Pain catastrophizing | When I am in pain, I worry all the time about whether the pain will end. | 13 | PCS-C5,6 | 0.88 |
| Anxiety sensitivity | It scares me when my heart beats rapidly. | 4 | ASI3,4 | 0.72 |
| Somatosensory amplification | I can sometimes hear my pulse or my heartbeat throbbing in my ear. | 4 | SSAS2 | 0.71 |
Abbreviations: SVF-KJ, German Coping Questionnaire for Children and Adolescents; SSAS, Somatosensory Amplification Scale; ASI, Anxiety Sensitivity Index; PCS-C, Pain Catastrophizing Scale for Children.