title: Fatigue in primary Sjögren's syndrome: is there a link with the fibromyalgia syndrome?
abstract: OBJECTIVE
  To determine whether fibromyalgia (FM) is more common in patients with primary Sjögren's syndrome (pSS) who complain of fatigue. The association and prevalence of fatigue and FM was recorded in a group of patients with pSS and a control group of lupus patients, a subset of whom had secondary Sjögren's syndrome (sSS).
  
  
  METHODS
  74 patients with pSS and 216 patients with lupus were assessed with a questionnaire to identify the presence of fatigue and generalised pain. From the lupus group, in a subset of 117 lupus patients (from the Bloomsbury unit) those with sSS were identified. All patients were studied for the presence of FM.
  
  
  RESULTS
  50 of 74 patients with pSS (68%) reported fatigue-a prevalence significantly higher than in the lupus group (108/216 (50%); p<0.0087). Fatigue was present in 7/13 (54%) patients with SLE/sSS. FM was present in 9/74 patients with pSS (12%), compared with 11/216 lupus patients (5%), and in none of the patients with SLE/sSS. None of these values corresponds with previously reported figures of the incidence of FM in pSS.
  
  
  CONCLUSIONS
  The results show that fatigue in patients with pSS and sSS is not due to the coexistence of FM in most cases. A lower incidence in the United Kingdom of FM in patients with pSS was found than has been previously reported.
authors.affiliation: Centre for Rheumatology, University College London, Arthur Stanley House, 40-50 Tottenham Street, London W1P 9PG, UK. I.Giles@lch.ucl.ac.uk
authors.forename: I
authors.initials: I
authors.lastname: Giles
authors.forename: D
authors.initials: D
authors.lastname: Isenberg
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D005221:Fatigue / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D005356:Fibromyalgia / Q000150:complications* / Q000453:epidemiology; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000150:complications / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012859:Sjogren's Syndrome / Q000150:complications* / Q000453:epidemiology; D006113:United Kingdom / Q000453:epidemiology