Table 4: Statistical analysis of preoperative and postoperative middle ear pressure.
Statistical analysis of preoperative and postoperative middle ear pressure | ||||||
Middle ear pressure (dapa) | Preop no. of ears | Preop Range(dapa) | Mean ± std deviation | Postop no. of ears | Postop Range (dapa) | Mean ± std. deviation |
< -150 | 9 | -156 to -210 | -201.77 ± -35.130 | 4 | -160 to -230 | -187.5 ± -25.860 |
0 to -150 | 5 | -90 to -144 | -109.75 ± -28.52 | 18 | -5 to -150 | -69.61 ± 46.69 |
0 to +150 | 4 | 35-112 | 91 ± 28.52 | 14 | 50 to 110 | 93.285 ± 15.42 |
> 150 | 22 | 195-268 | 226.59 ± 30.34 | 4 | 198-210 | 202 ± 4.690 |