Table 1.

Preoperative and postoperative mean BC and AC (dB) in frequencies of 500–3,000 Hz

		Preoperative	Postoperative	Gain	p
Mean BC (dB)	Causse Loop Piston	13.6±7.3*	6.6±5.7	7.0±8.8	<0.0001
	Big Easy Piston	12.8±6.5	7.9±5.9	4.9±6.6	<0.0001
	p-value	0.483	0.175	0.104
Mean AC (dB)	Causse Loop Piston	46.9±11.7	17.7±10.0	29.2±12.6	<0.0001
	Big Easy Piston	45.2±9.9	20.2±10.1	25.0±12.5	<0.0001
	p-value	0.343	0.132	0.044

^*Values are expressed as mean ±standard deviation (SD).

BC: bone conduction; AC: air conduction