Development and validation of a risk prediction model for gastroesophageal reflux disease: Gastroesophageal Reflux Disease Risk Scoring System

Table 1 Significance and strength of association for each risk factor of gastroesophageal reflux disease

Factor	Continuous variables		Categorical variables
	Spearman ‘rho’	P value	Fischer’s test	Cramer’s v value	Strength of association
Age	0.573	< 0.0011	< 0.0011	0.646	Strong
Body mass index	0.749	< 0.0011	< 0.0011	0.745	Strong
Smoking	-		< 0.0011	0.476	Relatively strong
Alcoholism	-		< 0.0011	0.434	Relatively strong
Sleep	0.710	< 0.0011	< 0.0011	0.642	Strong
Diet	0.492	< 0.0011	< 0.0011	0.639	Strong
Stress	0.289	< 0.0011	< 0.0011	0.727	Strong
Community2	-		0.129	0.0900	Very weak
Socio-economic status2	-		0.932	0.0465	Very weak

¹Indicates significance.

²Categorical data.