Table 3.

Pre-post operative audiological results

		Underlay group		Over-underlay group		p
		Ort. ± s.s.	Med (Min−Mak)	Ort. ± s.s.	Med (Min−Mak)
ABG	Preop	23.8 ± 5.0	25.0 (10.0−32.0)	24.3 ± 6.9	26.0 (10.0−34.0)	0.256
	Postop	12.1 ± 5.5	10.0 (5.0−25.0)	13.3 ± 6.4	10.0 (5.0−32.0)	0.225
Preop/Postop change		−11.7 ± 4.6	−12.0 (−21.0−0.0)	−11.1 ± 6.3	−10.0 (−23.0−0.0)	0.422
Change p		0.000		0.000
BC	Preop	13.5±  4.5	14.0 (5.0−25.0)	14.7 ± 3.8	15.0 (10.0−25.0)	0.099
	Postop	13.9 ± 4.7	15.0 (5.0−25.0	15.8 ± 3.8	15.0 (10.0−25.0)	0.013
Preop/Postop change		0.4 ± 1.6	0.0 (−3.0−5.0)	1.1 ± 2.0	0.0 (−3.0−6.0)	0.045
Change p		0.016		0.000
AC	Preop	36.9 ± 7.2	36.0 (20.0−50.0)	39.5 ± 7.8	40.0 (20.0−55.0)	0.051
	Postop	26.8 ± 8.0	25.0 (10.0−45.0)	29.2 ± 8.3	26.0 (15.0−50.0)	0.118
Preop/Postop change		−10.1 ± 5.4	−10.0 (−25.0−2.0)	−10.3 ± 7.1	−10.0 (−25.0−10.0)	0.706
Change p		0.000		0.000

Mann–whitney U test/Wilcoxon test

Bold values indicate p < 0.05 accepted as significant