Table 2.

DPOAE signal to noise ratio as a function of f2 frequency for different body positions

F2	Supine			Upright			Side-lying		p-value
	Mean	SD		Mean	SD		Mean	SD
1500 Hz	12.77	9.01		13.08	8.33		13.29	7.67	0.191
2000 Hz	14.99	8.52		15.36	6.34		16.03	8.38	0.094
3000 Hz	14.61	6.86		21.83	7.67		16.37	9.13	< 0.001
4000 Hz	13.32	11.34		19.34	10.06		14.24	7.04	< 0.001
5000 Hz	14.43	9.25		16.78	8.45		14.15	8.59	< 0.001
6000 Hz	8.78	8.19		13.49	7.29		11.20	9.37	< 0.001

DPOAE: Distortion-product otoacoustic emission