OBJECTIVE: To compare the relative effectiveness of the Polysymptomatic Distress Scale (PSD) with the Symptom Impact Questionnaire (SIQR), the disease-neutral revision of the updated @entity239 Impact Questionnaire (FIQR), in their ability to assess disease activity in @entity1 with @entity627 both with and without @entity239 ( @entity239 ). METHODS: The study included 321 @entity1 from 8 clinical practices with some 16 different @entity1118 . Disease severity was assessed by the Medical Outcomes Study Short Form-36 (SF-36). Univariate analyses were used to assess the magnitude of PSD and SIQR correlations with SF-36 subscales. Hierarchical stepwise regression was used to evaluate the unique contribution of the PSD and SIQR to the SF-36. Random forest regression probed the relative importance of the SIQR and PSD components as predictors of SF-36. RESULTS: The correlations with the SF-36 subscales were significantly higher for the SIQR (0.48 to 0.78) than the PSD (0.29 to 0.56; p < 0.001). Stepwise regression revealed that the SIQR was contributing additional unique variance on SF-36 subscales, which was not the case for the PSD. Random forest regression showed SIQR Function, Symptoms, and Global Impact subscales were more important predictors of SF-36 than the PSD. The single SIQR @entity158 item contributed 55% of SF-36 @entity158 variance compared to 23% with the 19-point WPI (the @entity158 ). CONCLUSION: The SIQR, the disease-neutral revision of the updated FIQ, has several important advantages over the PSD in the evaluation of disease severity in @entity1118 .

Evaluating Disease Severity in @entity1118 XXXX with and without @entity239 : A Comparison of the Symptom Impact Questionnaire and the Polysymptomatic Distress Scale.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity239 :: ('MESH:D005356', 'Disease') :: ['Fibromyalgia', 'fibromyalgia', 'FM'] @entity627 :: ('MESH:D012216', 'Disease') :: ['rheumatic disorders'] @entity158 :: ('MESH:D010146', 'Disease') :: ['pain', 'Widespread Pain Index component of PSD'] @entity1118 :: ('MESH:D059350', 'Disease') :: ['chronic pain disorders']
@entity1 :: (9606,Species) :: ['Patients']
