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

Table 1 Baseline characteristics of patients

	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 alone^b	5/26 (19)	3/23 (13)	6/60 (10)	0.32
Unemployed^b	0/26 (0)	3/23 (13)	9/60 (15)	0.066
Comorbid disease		14/23 (61)	39/60 (65)	0.80

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.

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