Table 1.
Comparison of mean DPOAE thresholds at 6 kHz among the groups on the throughout the study
| 6 kHz DPOAE | Control1 Min–Max (median) Mean ± SD | Papaverine2 Min–Max (median) Mean ± SD | Piracetam3Min–Max (median) Mean ± SD | P a | P b |
|---|---|---|---|---|---|
| Before noise trauma (n = 6) | 20.3–26.3 (23) | 18.1–29.1 (22.4) | 19.3–29.8 (26.3) | 0.796 | |
| 23.21 ± 2.70 | 23.24 ± 3.86 | 25.01 ± 4.57 | |||
| Immediately after the trauma (n = 6) | 10.9–15.3 (12.4) | 9.6–15 (14.7) | 11–16.7 (14.9) | 0.522 | |
| 12.84 ± 1.63 | 13.59 ± 2.15 | 14.19 ± 2.62 | |||
| Day 3 (n = 6) | 14.8–17.2 (15.4) | 14.6–23.2 (17.9) | 16.3–24.4 (20.8) | 0.027* | 1,2 P = 0.073 |
| 15.75 ± 0.86 | 18.54 ± 3.15 | 20.52 ± 3.58 |
1,3
P = 0.010* 2,3 P = 0.337 |
||
| Day 7 (n = 5) | 16.9–19.3 (18.6) | 15.3–27.4 (19.2) | 17.2–26.5 (24.3) | 0.185 | |
| 18.14 ± 1.11 | 20.8 ± 4.79 | 22.70 ± 4.09 | |||
| Day 14 (n = 4) | 17.5–19.9 (18.6) | 17.5–28.5 (23.2) | 22.2–27.8 (27.2) | 0.077 | |
| 18.64 ± 1.03 | 23.10 ± 4.80 | 26.09 ± 2.63 |
a
Kruskal–Wallis test. bMann–Whitney U test. *P < 0.05.