Absence of Relationship between Mitochondrial DNA Haplogroups and Cisplatin-Induced Hearing Loss

Figure 1

Audiometric studies of cancer patients. Hearing loss for cancer patients was analyzed by a pure-tone audiometry. The average decibel values were obtained for the following range of frequencies, 125–8000 Hz (125, 250, 500, 1000, 2000, 4000, and 8000), and were taken before and after treatment visit (a). The airway was taken as a reference for calculating the loss as long as there was no more than 5 dB gap between airway and bone conduction. Hearing loss was considered from a decrease in average greater than 10 dB and then was plotted onto the diagram as a male/female distribution (b).

(a)

(b)