Presentation: Chronic Widespread Pain.- A Comparisation between those who Meet Criteria for Fibromyalgia and Those Who do Not (2007)

1535 Chronic Widespread Pain.- A Comparisation between those who Meet Criteria for Fibromyalgia and Those Who do Not

PURPOSE: To compare persons with chronic widespread pain (CWP) fulfilling the 1990 ACR criteria for fibromyalgia (FM) with those who do not (non-FM) with respect to pain, disability, quality of life, coping strategies and mood. METHODS:A postal questionnaire and pain mannequin were sent to a randomly selected sample (9952 persons response rate 76.7%) from the general population in the county of Östergötland Sweden. Three hundred and forty five persons registered chronic widespread pain. Clinical examination was performed in 125, 97 females and 28 men, who completed self-rating questionnaires. RESULTS:CWP without widespread allodynia was found in 4.5% in the population and FM in 2.5%. Pain. The FM group had higher values for average pain Fibromyalgia Impact Questionnaire (FIQ) pain (p= .005), the Multidimen-sional Pain Inventory (MPI) pain (p= .001) and Health Survey Short Form (SF-36) body pain (p< .001). Least pain in the previous week was rated on the Pain Processing Inventory (PPI) as less intense in the non-FM (p=.013), no in difference worst pain (PPI). Disability. Using the Arthritis Self- Efficacy Scale (ASES) the FM was less confident about their ability to perform functions in daily living (p=.007) and to control other symptoms (p=.007). The total FIQ score showed higher impact of illness in the FM (p< .001,). No significant difference in employment rate between the groups was found. Coping. There were no significant differences between the FM and non-FM, except “praying and hoping” used more often by the non-FM (p=.033). Mood When depression and anxiety were rated using the Beck Depression Inventory and Beck Anxiety Inventory, FM subjects were more depressed (p=.018) and anxious (p=.014) than non-FM. Multivariate partial least squares-discriminant analysis was used to regress group membership (FM or WSPnon-FM). Variables shown with variable influence on projection (VIP) > 1.0 are the most influential in the model (Table 1). The model explained 27% of the variation in group membership (R2=0.27, Q2=0.19).
VIP are given for the variables >1.0.
Variables VIP
CSQ Praying/Hoping1.70
PPI Ability to reduce pain1.53
PPI Pain unpleasantness1.43
CSQ Control over pain1.41
SF-36, role physical1.25
PPI part of the day pain was felt1.19
Self Efficacy Scale; Pain1.18
MPI solicitous responses1.14
SF-36 Mental health1.12
MPI Pain interference1.07
FIQ total sum1.06
SF-36 vitality1.04
SF-36, bodily pain1.04

CONCLUSIONS: The study showed that fibromyalgia was associated with more severe symptoms/consequences than chronic widespread pain without widespread allodynia, and poorer pain control. The screening method of determining the number of tender points still appears to be a clinically valuable method to assess chronic widespread pain.

 L. C÷ster, None; S. Kendall, None; B. Gerdle, None; C. Henriksson, None; K.G. Henriksson, None; A. Bengtsson, None.