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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
  1. aN varies as participants with any missing data for a given sub-scale were excluded from the sum calculation
  2. bN was further reduced due to removal of participants who missed > 2 items across either identity columns (‘since’ and OCD ‘related’ symptoms). This was to remove individuals who incorrectly scored one of the columns, instead of both