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Table 1 Baseline characteristics of patients

From: Vulnerability to traumatic stress in fibromyalgia patients: 19 month follow-up after the great East Japan disaster

  Healthy control Rheumatoid arthritis Fibromyalgia P value
  (N= 26) (N= 23) (N= 60)  
Age (years)a 42.3 (12.5) 56.0 (14.4) 48.4 (14.8) 0.0047
Asian 26/26 (100) 23/23 (100) 60/60 (100)  
Duration of illness (years)   7.4 (6.7) 6.4 (7.4) 0.31
Living aloneb 5/26 (19) 3/23 (13) 6/60 (10) 0.32
Unemployedb 0/26 (0) 3/23 (13) 9/60 (15) 0.066
Comorbid disease   14/23 (61) 39/60 (65) 0.80
  1. Data represent mean (standard deviation) or n/N (%), unless otherwise indicated. aTukey–Kramer multiple comparisons test showed that mean age in the rheumatoid arthritis group was higher than that in the healthy control group (P <0.01). bHealthy control group versus others.