Page 47 - THE PERCEPT STUDY Illness Perceptions in Physiotherapy Edwin de Raaij

Table 1 presents the number of items per questionnaire per illness perception dimension and their outcome scores range. The authors of this systematic review hypothesized that a high score on the dimensions of Consequences, Timeline, Identity, Concern, and Emotional Response would be indicative of dysfunctional illness perceptions. On the dimensions of Personal and Treatment Control and Coherence, a low score would indicate dysfunctional illness perceptions4. The authors considered a positive association between illness perceptions and higher pain intensity or limited physical function to constitute dysfunctional illness perceptions. Therefore, the associations found for the illness perception dimensions of Personal and Treatment Control and Coherence were converted before being presented in this study’s results. The illness perception dimension of Causal beliefs is the only dimension that has a nominal measurement scale. Because of this nominal scale, it was not possible within this review to report an association or prognostic value of the illness perception dimension of Causal beliefs with pain intensity or physical function.
A systematic literature review
Table 1: Number of Questions Per Illness Perception Dimension and Their Outcome Score Ranges
Domain
IPQ
IPQ-R
Brief IPQ
Consequences Timeline-chronic Timeline-cyclical Personal Control Treatment Control Identity
Concern
Coherence Emotional Response Causal beliefs
7 items (7-35)* 3 items (3-15)*
6 items (6-30)* 12 items
18 items (no sum)
6 items (6-30)* 6 items (6-30)* 4 items (4-20)* 6 items (6-30)* 5 items (5-25)* 14 items
5 items (5-25)*
6 items (6-30)*
19 items (4 categories,‡ no sum)
1 item (0-10)† 1 item (0-10)†
1 item (0-10)† 1 item (0-10)† 1 item (0-10)† 1 item (0-10)† 1 item (0-10)† 1 item (0-10)† 1 item (0-10)† 1 item (open)
Abbreviations: IPQ, Illness Perception Questionnaire; IPQ-R, Illness Perception Questionnaire revised.
*= Scored on a 5-point Likert scale (1-5), †= Scored on a numeric rating scale (0-10), ‡ = Psychological, risk, immune, chance.
Pain is defined as an unpleasant sensory and emotional experience associated with actual or potential tissue damage or described in terms of such damage30. Questionnaires assessing pain intensity may have opposing scores. For instance, a high score on the numeric painrating scale indicates higher pain intensity, whereas a high score on the bodily pain dimension of the Medical Outcomes Study 36-Item Short-Form Health Survey indicates less pain. To resolve such discrepancies, the authors converted all pain measurement scales so that higher scores would indicate higher pain intensity.
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