Table 2.

Demographic characteristics of subjects with non-erosive gastroesophageal reflux disease

		Grade n	Grade M	Total	P value
Number		3	7	10
Age		22.3 ± 5.8	22.1 ± 0.7	22.2 ± 0.6	0.73
Height		159.7 ± 3.2	156.7 ± 8.3	157.6 ± 7.0	0.31
Weight		52.2 ± 2.5	52.7 ± 6.0	52.6 ± 5.0	0.91
CYP2C19	RM/IM/PM	1/2/0	3/2/2002	5/2/2003	0.41
24 h pH	Gastric pH	2.6 (2.6-2.6)	2.4 (1.5-2.8)	2.5 (1.5-2.8)	0.31
	Esophageal pH	6.6 (6.4-7.6)	6.6 (6.4-7.5)	6.6 (6.4-7.6)	0.75
FSSG		19 (15-24)	22 (19-31)	21 (15-31)	0.3

Age, height, body weight and height are given as mean ± SD. Twenty-four hour pH and frequency scale for the symptoms of gastroesophageal (FSSG) score are given as median (range). RM: Rapid metabolizer; IM: Intermediate metabolizer; PM: Poor metabolizer.