Primary
| | |
Age | Years | Age at baseline test |
Gender | Yes/no | Yes if male |
Dominant sided ear | Yes/no | Yes if ear is same side as dominant hand |
Family history | Yes/no | If family member had unusual HL |
Construction work | Years | Years of work in construction industry |
Non-construction work | Years | Years of work in non-construction jobs with high noise exposure |
| | |
Secondary
| | |
Race | Yes/no | Yes if Caucasian |
Brown eyes | Yes/no | Yes if brown |
Dark hair | Yes/no | Yes if black, brown, dark brown |
Firearms, military | Years | Years of regular* military use of firearms or exposure to blasts/explosions |
Firearms, non-military | Years | Years of regular* non-military firearm use |
Machinery, military | Years | Years of regular† exposure to heavy machinery in the military |
Machinery, non-military | Years | Years of regular† use of heavy machinery at home |
Power tools | Hours/week | Average hours per week spent using power tools at home |
Motorcycle use | Years | Years of regular* motorcycle riding |
Other vehicles | Yes/no | Yes if regular* use of snowmobiles or piloting aircraft |
Loud recreation | Yes/no | Yes if regular (at least several times monthly) attendance at concerts, dances, races, or sporting events |
Loud music | Yes/no | Yes is listen to music at “loud” levels |
Smoking status | Current, ex, never | Smoking status category at baseline test |
Disease | Yes/no | Yes if any of the following were self reported: arthritis, kidney disease, meningitis, mumps, diabetes, autoimmune diseases, hypertension, high cholesterol, cardiovascular disease, scarlet fever, neurological or seizure disorders, otoschlerosis, or Meniere’s disease |
Ear trauma | Yes/no | Yes if report of ear surgery (include P/E tube placement), or ear injury (including damage due to explosions or blasts) |
Ototoxic therapy | Yes/no | Yes if history of intravenous antibiotic therapy within 6 months prior to test, chemotherapy within 6 months prior to test, antimalarials (quinine or chloroquine) within 48 hours prior to test or diuretics (Edecrin or Lasix) within one week prior to test |
Aspirin | Yes/no | Yes if within 24 hours prior to test |
Solvents | Years | Years of frequent exposure to solvents on or off the job |
Paints | Years | Years of frequent exposure to oil based paints on or off the job |