Table 3.

Perforation site

Site of perforation	Side of perforation				Total		Hearing loss in dB
	Right		Left		No	%
	No	%	No	%
Single quadrant
AS	16	04.60	17	04.10	33	4.29	24.00 ± 4.6	< 0.0001 (ANOVA)
PI	16	04.60	19	04.60	35	4.55	32.40 ± 5.2
AI	11	03.20	16	04.00	27	3.51	30.10 ± 7.8
PS	30	08.10	43	10.60	73	9.37	48.60 ± 5.5
Two quadrants
AI + AS	56	15.60	55	13.20	111	14.45	28.40 ± 2.2	< 0.0001 (ANOVA)
PS + PI	59	16.60	75	18.20	134	17.45	48.90 ± 7.5
AI + PI	78	21.80	96	23.40	174	22.66	36.40 ± 6.8
Three quadrants
AI + PI + PS	36	09.80	26	06.40	62	8.09	40.20 ± 6.5
Four quadrants
AI + PI + PS + PI	56	15.70	64	15.50	120	15.63	51.56 ± 5.1
Total	358	100.00	411	100.00	769	100.00