Table 4.
Average rates of change to audiometric thresholds and PTA (dB) per year
95% CI | |||
---|---|---|---|
B | LL | UL | |
Frequency (Hz) | |||
250 | 0.42 | 0.38 | 0.45 |
500 | 0.56 | 0.52 | 0.60 |
1000 | 0.75 | 0.70 | 0.80 |
2000 | 0.98 | 0.93 | 1.03 |
3000 | 0.97 | 0.92 | 1.02 |
4000 | 0.98 | 0.93 | 1.03 |
6000 | 1.14 | 1.08 | 1.20 |
8000 | 1.44 | 1.38 | 1.50 |
PTA | 0.83 | 0.79 | 0.86 |
B Beta coefficient; CI Confidence Interval, LL Lower limit, UL Upper limit, PTA pure-tone average, calculated from frequencies 500, 1000, 2000 and 4000 Hz averaged across right and left ears, dB decibels.