Table 3. Comparison of postoperative bone conduction average in both groups.

			Type of graft		Total
			Vein	Fat
Improvement of BC	> 10 dB	Count	15	11	26
		% within improvement of BC	57.7%	42.3%	100.0%
		% within type of graft	42.9%	31.4%	37.1%
	< 10 dB	Count	15	18	33
		% within improvement of BC	45.5%	54.5%	100.0%
		% within type of graft	42.9%	51.4%	47.1%
	Worsened	Count	5	6	11
		% within improvement of BC	45.5%	54.5%	100.0%
		% within type of graft	14.3%	17.1%	15.7%
Total		Count	35	35	70
		% within improvement of BC	50.0%	50.0%	100.0%
		% within type of graft	100.0%	100.0%	100.0%

Abbreviation: BC, bone conduction.

Pearson chi-squared test: 0.979

Degree of freedom = 2

p =  0.613.