Table 2

Comparison of mean in the ear noise intensities between groups

	0.2 kHz	0.5 kHz	1 kHz	2 kHz	4 kHz	6 kHz	8 kHz
Data are p values for noise intensities and standard error (see table 1).
CPAP, Continuous positive airways pressure.
No respiratory support v ventilated	0.88	0.72	0.44	0.45	0.66	0.37	0.12
Ventilated v CPAP	0.052	0.003	0.001	0.001	0.001	0.001	0.001
No respiratory support v CPAP	0.059	0.001	0.001	0.001	0.001	0.001	0.001