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Table 2: Comparison of audiometric data in ears for patients with unilateral IAC diverticula in the absence of otosclerosis (N = 22)^{^a}
No.^{^b} IAC Diverticulum No IAC Diverticulum Difference^{^c} P Value^{^d}
Bone conduction pure tone average 22 22.5 (13–41) 17 (8–35) 1 (−4–17) .31
    BC 250 Hz (dB) 20 17.5 (7.5–25) 12.5 (7.5–20) 2.5 (−5–15) .19
    BC 500 Hz (dB) 21 20 (10–40) 15 (10–25) 5 (0–20) .14
    BC 1000 Hz (dB) 20 22.5 (10–40) 15 (5–27.5) 0 (−2.5–25) .17
    BC 2000 Hz (dB) 19 30 (10–50) 20 (10–45) 0 (−10–15) .50
    BC 3000 Hz (dB) 18 25 (7.5–47.5) 20 (10–55) 0 (−10–15) .63
    BC 4000 Hz (dB) 21 25 (10–50) 35 (15–60) 0 (−5–5) .97
Air conduction pure tone average 22 31 (20–75) 20 (9–41) 4 (1–29) .06
    AC 250 Hz (dB) 22 22.5 (15–60) 17.5 (10–35) 2.5 (−5–20) .19
    AC 500 Hz (dB) 22 25 (15–75) 22.5 (10–40) 2.5 (−5–20) .30
    AC 1000 Hz (dB) 22 27.5 (15–75) 20 (5–40) 5 (0–30) .06
    AC 2000 Hz (dB) 22 32.5 (15–70) 20 (5–50) 10 (0–30) .10
    AC 3000 Hz (dB) 20 37.5 (15–60) 20 (12.5–62.5) 5 (−5–25) .34
    AC 4000 Hz (dB) 22 40 (20–85) 37.5 (15–70) 5 (−5–40) .22
Air-bone gap 22 5 (0–12) 0 (0–5) 2 (0–9) .37
    Word recognition (%) 17 100 (85–100) 100 (95–100) 0 (−15–0) .55
Note:—AC indicates air conduction; BC, bone conduction.
↵a Data are median and IQR.
↵b Summarized for a subset of patients with data for both ears.
↵c Calculated as IAC minus non-IAC.
↵d Determined using Wilcoxon signed rank tests.