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Table 3 Demographic characteristics of 18 female dry cleaning workers in the study

From: Biological exposure assessment to tetrachloroethylene for workers in the dry cleaning industry

Characteristic Mean ± Standard deviation Range Percent
Age (years) 41 ± 12 22 – 68  
Body mass index a 28 ± 5 21 – 37  
Race (white)    72
Employment in industry (years) 8 ± 5 1 – 19  
  1. a BMI calculated as weight(kg)/[height (m)]2. Normal BMI for adult women is 19–25 kg/m2. BMI > 30 is considered obese [35]