Table 1.

The frequency, amplitude and conduction velocity of the slow waves of the healthy volunteers and patients with gastroesophageal reflux disease (GERD)⁺

	Slow waves
	Frequency c/m		Amplitude (mV)		Velocity (cm/s)
	Mean	Range	Mean	Range	Mean	Range
Volunteers	5.2 ± 1.3	4 – 7	0.52 ± 0.1	0.4 – 0.6	4.8 ± 0.7	3.5 – 6.1
Score 1 GERD	4.8 ± 1.2	4 – 6•	0.49 ± 0.1•	0.35 – 0.6	4.6 ± 0.7•	4.1 – 5.9
Score 2 GERD	Irregular
Score 3 GERD	Absent waves

⁺ values were given as the mean ± SD

^• p > 0.05

p values of the patients were compared to those of the healthy volunteers