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

Table 3 Gastroesophageal reflux disease Risk Scoring Scale (Gastroesophageal Reflux Disease Risk Scoring System)

Factor	Parameter	Score
Age (years)	Less than 20	3
	21-40	5
	41-60	8
	61-80	11
	Greater than 81	13
Body mass index	Less than 18	3
	18-22.9	7
	23-24.9	10
	More than 25	13
Smoking	Non-smoker	0
	Smoker < 5 pack years	0.2
	Smoker > 5 pack years	0.4
Alcohol score	Non-alcoholic	0
	0–6	0·2
	7–12	1.4
Diet score	< 4	2
	4–8	1.5
	8–12	1
	> 12	0.5
Stress score	< 4.5	1
	4.5–6	2
	> 6	2.5
Sleep score	< 4	3
	4–8	6
	> 8	9