Environmental noise alters gastric myoelectrical activity: Effect of age

Table 1 Characteristics of baseline gastric myoelectrical activity over age

	Dominantfrequency	Dominantpower	3 CPMactivity (%)
Age < 50 yr (n = 12)	3.0 ± 0.1	401.4 ± 103.8	87.9 ± 5.1
Age > 50 yr (n = 9)	3.1 ± 0.3	115.1 ± 45.7	77.7 ± 7.6
P value	P = 0.724	P < 0.05	P = 0.259

Table 2 Effect of various types of noise on blood pressure and heart rate

		Baseline	ICU	Babble	Traffic
	Systolic	122.2 ± 11.3	122.1 ± 19.3	119.3 ± 13.2	122.2 ± 12.6
Age < 50 yr	Diastolic	78.1 ± 11.5	76.1 ± 14.8	74.3 ± 12.9	79.2 ± 12.6
(n = 12)	Pulse	73.6 ± 9.5	75.6 ± 10.2	76.4 ± 14.8	75.5 ± 9.8
	Systolic	132.9 ± 18.8	136.5 ± 15.6	135.1 ± 19.3	136.0 ± 14.8
Age > 50 yr	Diastolic	85.4 ± 11.4	85.7 ± 11.3	86.3 ± 13.1	83.6 ± 12.3
(n = 9)	Pulse	70.7 ± 16.5	75.4 ± 14.8	72.9 ± 15.1	71.7 ± 15.0

No significant change was observed in these parameters during exposure to auditory stimuli.