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Table 2 Indices of symptom severity and disability in subjects with LBP

From: Ultrasound evidence of altered lumbar connective tissue structure in human subjects with chronic low back pain

McGill pain questionnaire (# of words circled) (N = 49) 8.8 ± 4.9
Duration of pain (years) (N = 52) 10.0 ± 7.1
Current pain intensity (0-10 scale) (N = 54) 3.2 ± 2.2
Exacerbation intensity (0-10 scale) (N = 51) 6.1 ± 2.2
Exacerbation frequency (N = 52)  
   Yearly 12%
   Monthly 29%
   Weekly 30%
   Daily 29%
Exacerbation duration (days) (N = 51) 24.1 ± 86.1
Percent initial injury (N = 52) 42%
Oswestry disability scale (N = 51)  
   Mild 67%
   Moderate 21%
   Severe 12%
  1. Results expressed as Mean ± SD or percentage of subjects surveyed. N = number of subjects that completed each questionnaire.