Observational Study
Copyright ©The Author(s) 2022.
World J Clin Cases. Feb 26, 2022; 10(6): 1815-1825
Published online Feb 26, 2022. doi: 10.12998/wjcc.v10.i6.1815
Table 1 Lower limit at 95% of extended high-frequency audiometry thresholds (n = 86)
EHF (kHz)
mean ± SD
Min
Max
25th
50th
75th
95th
93.14 ± 5.26-5.0015.000.005.005.0015.00
100.93 ± 5.34-15.0015.00-5.000.005.0010.00
11.22.50 ± 7.19-15.0025.000.000.005.0020.00
12.5-0.52 ± 6.90-15.0020.00-5.000.005.0015.00
140.52 ± 7.97-10.0020.00-5.000.005.0015.00
16-3.08 ± 13.15-20.0025.00-15.00-5.005.0020.00
18-4.48 ± 16.09-20.0030.00-20.00-10.0010.0028.25
20-13.78 ± 7.39-25.0015.00-20.00-15.00-10.000.00
Table 2 Age distribution for noise exposure and low noise exposure groups (n = 159)
GroupnFemaleMaleMean ± SDMinMax25th50th75th
Low noise exposure61451621.59 ± 2.00182520.0021.0023.50
Noise exposure98643421.17 ± 1.55182520.0021.0022.00
Table 3 Thresholds of participants for conventional audiometry (n = 159)
Ear
Group
n
0.25 kHz (mean ± SD)
0.5 kHz (mean ± SD)
1 kHz (mean ± SD)
2 kHz (mean ± SD)
4 kHz (mean ± SD)
8 kHz (mean ± SD)
Right Low noise exposure617.30 (± 5.21)7.82 (± 4.91)6.97 (± 4.50)6.97 (± 5.42)4.26 (± 5.69)7.54 (± 6.50)
Noise exposure986.99 (± 5.91)7.65 (± 5.14)8.06 (± 4.90)8.21 (± 5.62)5.87 (± 5.65)8.78 (± 6.70)
Left Low noise exposure616.80 (± 5.70)6.80 (± 4.48)5.66 (± 4.42)6.07 (± 5.99)5.57 (± 5.63)8.28 (± 6.18)
Noise exposure987.45 (± 5.38)8.32 (± 5.70)7.14 (± 5.13)6.99 (± 5.78)5.15 (± 5.54)9.03 (± 6.37)
Table 4 Chi-square test results for extended high-frequency audiometry (n = 159)
Ear
Frequency (kHz)
Group
Normal (N)
Abnormal (N)
Abnormalrate (%)
χ2
P value
Right905658.21.330.25
1841414.3
100511016.42.620.11
1712727.6
11.205834.92.360.12
1861212.2
12.5054711.52.130.15
1782020.4
140511016.41.470.23
1742424.5
16052914.81.090.30
1772121.4
1806011.61.00a
19533.1
2005746.60.77a
19088.2
Left9052914.80.190.67
1811717.3
100451626.20.740.39
1663232.7
11.2053813.11.020.31
190810.1
12.50511016.40.030.86
1831515.3
140501118.00.050.83
1791919.4
160501118.00.050.83
1791919.4
1805746.60.77a
19088.2
2005658.21.330.25
1841414.3
Table 5 Chi-square test results for distortion otoacoustic emission (n = 159)
Ear
Frequency(kHz)
Group
Normal (n)
Abnormal (N)
Abnormal rate (%)
Fisher P value
Right106011.60.41
19355.1
1.506100.00.52
19622.0
206100.00.52
19622.0
306100.0
19800.0
406100.01.00
19711.0
605658.21.00
19088.2
Left106011.61.00
19533.1
1.506100.01.00
19711.0
206100.00.52
19622.0
306011.61.00
19622.0
405923.30.15
19800.0
605658.20.51
19355.1
Table 6 Chi-square test results for transient evoked otoacoustic emission (n = 159)
Ear
Frequency (kHz)
Group
Normal (n)
Abnormal (n)
Abnormal rate (%)
Fisher P value
Right106100.01.00
19711.0
1.506100.01.00
19711.0
206011.60.38
19800.0
305923.31.00
19533.1
405655.20.05a
1782020.4
Left106011.60.52
19622.0
1.506100.0
19800.0
206011.61.00
19622.0
306011.61.00
19622.0
405834.90.07
1841414.3