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Table 1 Demographic characteristics of the participants (n=408)

From: Measurement precision of the disability for back pain scale-by applying Rasch analysis

Characteristic Mean ± SD (range) percentage
Age (years) 59.0±14.8 (15–86)
  <35 8.5%
  35–49 14.3%
  50–64 36.0%
  65–79 35.4%
  80-86 5.8%
Gender  
  Male 35.5%
  Female 64.5%
Disease duration (month) 54.2±79.8 (0.3-600)
  Acute (<6wk) 7.8%
  Subacute (6wk-3mo) 12.0%
  Chronic (>3mo) 80.2%
VAS score 5.2±2.8 (0.2-10)
  Outpatients 5.3±2.5
  Inpatients 6.2±2.4 (p = 0.001)
Education  
  Elementary school 49.2%
  Secondary school 31.2%
  University 19.6%
Marital status  
  Single/widow 23.1%
  Married 76.9%
Occupation  
  Office worker 10.9%
  Laborer 17.8%
  Housewife 37.8%
  Student 2.2%
  Retired 20.8%
  Unemployment 10.5%
Diagnosis  
  Spondylolisthesis 31.7%
  Degenerative disc disease 17.4%
  Herniated intervertebral disc 20.4%
  Fracture 12.9%
  Non-specific back pain 17.6%