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. Author manuscript; available in PMC: 2011 Feb 14.
Published in final edited form as: J Occup Environ Med. 2006 Aug;48(8):759–770. doi: 10.1097/01.jom.0000232486.07658.74

Table 2.

Serum [PFOA] ng/mL by Occupational Exposure Group

Occupational Exposure N Median Mean IQR
NO OCCUPATIONAL EXPOSURE 312 329 423 175–537
POTENTIAL OCCUPATIONAL EXPOSURESa 48 388 406 168–623
      Firefighter: voluntary, military, company employee or paid 29 447 453 236–709
      Non-production area of fluoropolymer facility, in production area not meeting criteria for substantial occupational exposure, or requiring visits to facility. 18 381 386 125–430
      Carpet cleaning, retreating carpets or rugs, or in professional carpet installation 13 302 408 191–631
      Facility processing or disposing fluoropolymer production waste 8 253 578 115–918
SUBSTANTIAL OCCUPATIONAL EXPOSURE [Production area within a facility in which PFOA was used in the production process >1 year and last exposure having occurred within previous 10 years] 18 775 824 422–999
a

Some individuals had more than one potential occupational exposure, therefore N for the potential occupational exposure subgroups does not total to 48.