Effects of Cardiopulmonary Bypass Surgery on Auditory Function: A Preliminary Study

Table 4

Comparison of the mean SNR values of DPOAEs in the subjects before and after CBP surgery.

Frequency	Right ear				𝑡 value	Left ear				𝑡 value
	Mean (before)	SD	Mean (after)	SD		Mean (before)	SD	Mean (after)	SD
357 Hz	5.23	3.5	4.98	3.12	1.03	5.07	3.48	4.80	3.24	1.97
499 Hz	5.30	3.56	4.87	2.91	1.37	5.5	3.60	5.45	3.52	1.31
704 Hz	3.87	3.87	3.17	2.79	2.17*	4.30	3.65	3.70	3.11	2.34*
1003 Hz	3.47	3.31	2.63	2.71	2.62*	3.60	3.00	3.33	3.10	0.81*
1409 Hz	2.23	3.08	1.80	3.25	1.06*	2.27	3.88	1.80	3.25	1.88
2000 Hz	1.03	2.85	0.33	2.81	1.21*	1.10	2.54	0.79	2.77	2.11*
2822 Hz	−0.60	2.87	−0.73	2.93	0.90	−0.87	3.77	−1.23	4.13	1.38
3991 Hz	−1.30	3.34	−1.50	3.50	0.69	−1.31	3.30	−1.51	3.48	0.71
5649 Hz	−2.30	3.78	−2.80	3.84	2.01*	−2.00	3.73	−2.67	3.84	2.21*

^∗𝑃<0.05, ^∗∗𝑃<0.01, and ^∗∗∗𝑃<0.001.