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. Author manuscript; available in PMC: 2023 Jan 1.
Published in final edited form as: Ear Hear. 2021 Nov 30;43(4):1282–1290. doi: 10.1097/AUD.0000000000001176

Figure 4.

Figure 4.

PTA4 BC and AC threshold shifts between the first and last tests for 68 ears with cholesteatoma that meet criteria for progressive hearing loss. BC threshold shifts (blue bars) indicate that all ears have shifts to poorer hearing of at least 10 dB. AC thresholds shifts (red bars) indicate ears with improved hearing for the last test (left), more stable hearing (middle), and poorer hearing for the last test (right). Note the differences in identifying progressive hearing loss between BC and AC thresholds.