Table 4. Summary of the estimate of GERD syndrome in multiple logistic regression analysis.

	Reflux esophagitis (N = 6,895)			Non-erosive reflux disease (N = 7,019)
	Standardized Coefficient	Odds Ratio (95% CI)	p-value	Standardized Coefficient	Odds Ratio (95% CI)	p-value
Age	0.159	1.02 (1.01–1.03)	<0.001*	−0.154	0.98 (0.97–0.99)	<0.001*
Sex
female		reference			reference
male	0.426	2.37 (1.95–2.90)	<0.001*	−0.125	0.78 (0.66–0.91)	0.002*
BMI	0.399	1.13 (1.11–1.15)	<0.001*	0.073	1.02 (1.00–1.04)	0.035*
PG-I/PG-II	0.220	1.11 (1.06–1.17)	<0.001*	−0.031	0.99 (0.94–1.03)	0.521
Smoking
nonsmoker		reference			reference
former smoker	0.109	1.24 (1.04–1.49)	0.019*	0.086	1.19 (0.63–1.32)	0.048*
smoker	0.214	1.62 (1.33–1.98)	<0.001*	0.139	1.36 (1.12–1.64)	0.002*
Alcohol
rarely drinking		reference			reference
usually drinking	0.143	1.34 (1.14–1.58)	<0.001*	0.059	1.13 (0.98–1.30)	0.093
Coffee
<1/day		reference			reference
1–2/day	−0.062	0.88 (0.74–1.04)	0.133	−0.036	0.93 (0.79–1.08)	0.336
≥3/day	−0.081	0.84 (0.70–1.01)	0.057	−0.032	0.93 (0.79–1.10)	0.408
H. pylori
Negative		reference			reference
positive	−0.482	0.35 (0.28–0.45)	<0.001*	0.065	1.15 (0.94–1.40)	0.158

^*: A p-value less than 0.05 was considered statistically significant.