Table 2.

Clinical features of non-erosive reflux disease Grade N and M

	Grade N (n = 56)	Grade M (n = 41)	P value
Age (yr), mean ± SD	49.8 ± 16.7	53.3 ± 13.7	0.32
Sex, male/female	14/42	18/23	0.05
BMI (kg/m2)	22.5 ± 4.4	21.5 ± 2.6	0.44
Height (cm)	158.6 ± 7.3	162.9 ± 8.3	0.02
Weight (kg)	56.7 ± 12.1	57.2 ± 8.4	0.50
Hiatal hernia (+/-)	7/49	14/27	0.02
Drinking (+/-)	17/39	18/23	0.10
Smoking (+/-)	7/49	8/23	0.30

BMI: Body mass index.