1. DOB = date of birth
2. ID = 4-character subject identifier
3. isHL = has hearing loss
4. BEPTA = better ear pure tone average (dB HL)
5. BESII = better ear speech intelligibility index
6. ageID = age hearing loss identified (months)
7. ageAmp = age fitted with amplification (months)
8. isMale = is male
9. race: 1=Pacific Island, 2=Native American, 3=Black/African, 4=Asian, 5=White, 6=mix
10. edMom/edDad: 1=elementary school, 2=junior high, 3=GED, 4=high school, 5=enrolled in technical/vocational school, 6=completed technical/vocational school, 7=enrolled in university, 8=bachelor’s degree, 9=enrolled in graduate school, 10=master’s degree, 11=enrolled in doctoral degree, 12=PhD/JD/MD
11. CI = has cochlear implant