Table 1 Factorial structures of the RPQ investigated in the present study
Item label (shortened version) | One-factor model [6] | Two-factor model [19] | Two-factor model [20] | Three-factor model [21] | Three-factor model [22] | Four-factor model [23] |
|---|---|---|---|---|---|---|
Headaches | RPQ | Emotional-somatic | RPQ-3 | Somatic | General somatic | Vertigo |
Dizziness | RPQ | Emotional-somatic | RPQ-3 | Somatic | General somatic | Vertigo |
Nausea | RPQ | Emotional-somatic | RPQ-3 | Somatic | General somatic | Vertigo |
Noise sensitivity | RPQ | Emotional-somatic | RPQ-13 | Somatic | General somatic | Vertigo |
Sleep disturbance | RPQ | Emotional-somatic | RPQ-13 | Somatic | General somatic | Mood/somatic |
Fatigue | RPQ | Emotional-somatic | RPQ-13 | Somatic | Mood/cognition | Mood/somatic |
Irritable | RPQ | Emotional-somatic | RPQ-13 | Emotional | Mood/cognition | Mood/somatic |
Depressed | RPQ | Emotional-somatic | RPQ-13 | Emotional | Mood/cognition | Mood/somatic |
Frustrated | RPQ | Emotional-somatic | RPQ-13 | Emotional | Mood/cognition | Mood/somatic |
Forgetful | RPQ | Cognitive | RPQ-13 | Cognitive | Mood/cognition | Cognitive |
Poor concentration | RPQ | Cognitive | RPQ-13 | Cognitive | Mood/cognition | Cognitive |
Longer to think | RPQ | Cognitive | RPQ-13 | Cognitive | Mood/cognition | Cognitive |
Blurred vision | RPQ | Emotional-somatic | RPQ-13 | Somatic | Visual somatic | Vision |
Light sensitivity | RPQ | Emotional-somatic | RPQ-13 | Somatic | Visual somatic | Vision |
Double vision | RPQ | –a | RPQ-13 | Somatic | Visual somatic | Vision |
Restless | RPQ | Emotional-somatic | RPQ-13 | Emotional | General somatic | Mood/Somatic |