Table 3.

Multivariate Analysis of Factors Associated with FD Alone, FD-NERD Overlap, or NERD Alone Participants

		FD alone				FD-NERD overlap				NERD alone
		OR (95% CI)		p value		OR (95% CI)		p value		OR (95% CI)		p value
Age		0.97 (0.94-0.998)		0.038		1.02 (0.99-1.04)		0.229		1.01 (0.99-1.04)		0.254
Female		1.70 (1.00-2.93)		0.048		2.08 (1.24-3.52)		0.0051		0.68 (0.41-1.11)		0.126
BMI 18.5>/18.5-25		1.73 (0.85-3.27)		0.123		2.87 (1.56-5.07)		0.0011		1.20 (0.45-2.66)		0.684
BMI ≥25/18.5-25		0.67 (0.28-1.42)		0.319		1.07 (0.54-1.98)		0.835		1.38 (0.84-2.22)		0.201
Current smoking		0.85 (0.36-1.76)		0.683		1.45 (0.75-2.62)		0.259		0.95 (0.53-1.62)		0.856
Alcohol consumption ≥20 g/day		1.11 (0.55-2.07)		0.761		1.85 (1.06-3.15)		0.032		2.25 (1.43-3.49)		0.0005
High STAI score level		3.88 (2.35-6.64)		<0.0001		2.53 (1.62-4.00)		<0.0001		1.73 (1.14-2.62)		0.010
Hiatal hernia		0.71 (0.36-1.30)		0.277		1.22 (0.50-1.40)		0.448		1.41 (0.89-2.18)		0.138

FD: functional dyspepsia, NERD: nonerosive reflux disease, OR: odds ratio, CI: confidence interval, BMI: body mass index, STAI: State-Trait Anxiety Inventory