Advances in Otolaryngology / 2015 / Article / Tab 2

Research Article

Incidence of Cisplatin Induced Ototoxicity in Adults with Head and Neck Cancer

Table 2

Chang classification of cisplatin induced hearing loss [7].

GradeSensorineural hearing threshold (db HL)

0≤20 dB at 1, 2, and 4 kHz
1a≥40 dB at any frequency 6–12 kHz
1b>20 and >40 dB at 4 kHz
2a≥40 dB at 4 kHz and above
2b>20 and <40 dB at any frequency below 4 kHz
3≥40 dB at 2 or 3 kHz and above
4≥40 dB at 1 kHz and above

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