Table 6 Descriptive statistics of total IPQ-O sub-scale scores
From: Testing the psychometric properties of the illness perceptions questionnaire for OCD (IPQ-O)
Scales (possible score range) | Mean item level sub-scale score (mean total sub-scale score / N items in sub-scale) | Na | Meaning of a high sub-scale score |
|---|---|---|---|
Identity scale (0–23) | N/A | 260b | Many symptoms attributed to OCD |
Main sub-scales | |||
1. Consequences (14–70) | 3.76 | 321 | Many negative consequences caused by OCD |
2. Control (13–65) | 3.46 | 319 | Positive beliefs about being able to control OCD |
3. Permanence (11–55) | 3.97 | 332 | Perceiving OCD as permanent and therefore inseparable from self. |
4. Coherence (5–25) | 3.53 | 334 | Positive views reflecting perceptions of a coherent understanding of OCD |
5. Reactivity (12–60) | 3.55 | 324 | Perceptions that OCD symptoms are changeable/reactive |
6. Spectrum (5–15) | 2.87 | 339 | Perception that OCD presents as a trait in the general population |
7. Emotional representation (7–35) | 4.04 | 334 | Many negative emotions associated with having the condition. |
Causes sub-scales | |||
1.Environmental stress (7–35) | 3.22 | 320 | Perceptions that life stresses contributed to development of OCD |
2. Biological causes (5–15) | 3.73 | 324 | Perception that OCD was caused by biological factors |
3. Learned behaviour (5–10) | 2.91 | 327 | Perception that OCD developed through learning |
4. Own characteristics or behaviour (5–20) | 3.26 | 321 | Perception that own characteristics (E.g. personality) or behaviour are responsible for OCD |