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Table 2 Demographic differences between groupsa

From: Postural control deficits in people with fibromyalgia: a pilot study

Variable Healthy controls Fibromyalgia Statistical significance
Mean age, years (± SD) 46.5 (± 10.9) 50.8 (± 7.7) NS
Females 89% 88% NS
Caucasian 92.6% 88.0% NS
Married 77.8% 72.0% NS
Highest education level    0.002
   High school 7.4% 8.0%  
   Trade school or some college 0.0% 8.0%  
   College graduate 25.9% 64.0%  
   Postgraduate education 66.7% 2.0%  
Annual household income    0.045
   < $30,000 7.6% 24.0%  
   $30,000 to $70,000 26.9% 36%  
   $70, 000 to $100,000 7.6% 24.0%  
   > $100,000 57.7% 24.0%  
  1. aSD: standard deviation.