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. 2023 Sep 16;13(4):98–105. doi: 10.4103/jwas.jwas_77_23

Table 6.

Audiometric notch at 4 kHz for both subjects and controls

Notch at 4 kHz Subjects Controls χ 2 P value
Frequency Percent Frequency Percent
Yes 17 6.3 0 0.0
No 255 93.7 272 100 17.548* 0.0001
Total 272 100 272 100

*Yates correction was used for expected count less than 5.