Table 1. General characteristics of study participants (N = 30,072^a).

Characteristic	Meanb ± SD
Occupational noisec	88.6±5.3
Age (y)	44.4±9.3
BMI (kg/m2)	23.6±3.0
Sex [male; n (%)]	27,857 (92.6)
Hypertension [n (%)]	4,873 (16.2)
Hearing Thresholds (dBHL)
PTA at 2, 3, 4 Khz d	28.1±14.7
0.5 kHz	15.6±11.1
1 kHz e	15.8±12.2
2 kHz	18.8±14.3
3 kHz	28.4±17.4
4 kHz	37.3±18.3
6 kHz	41.6±20.3
Hearing Lossf (PTA>25dBHL, %)	20461, 68%

^aParticipants (N = 33,072) are the individuals having all interest variables in this study: advanced audiometric measurements, age, occupational noise, sex, BMI, and hypertension.

^bAge-adjusted means were presented.

^cOccupational noise (a daily 8-hour time weighted average level in each industry).

^dPTA (pure tone average) of standard threshold at 2, 3, 4 kHz frequencies.

^eHearing thresholds at 1 kHz were obtained from primary audiometric tests.

^fHearing Loss (PTA at 2, 3, 4 KHz frequencies > 25 dBHL).

SD, standard deviation.