Prevalence of gastroesophageal reflux symptoms in a large unselected general population in Japan

Table 1 Questionnaire used in this study

Please circle the appropriate responses for each of the following symptoms during a 1-mo period
(1) Do you suffer from the symptom of dysphagia?
	1: yes	2: no
	(a: usually; b: sometimes)
	(c: throat; d: chest; e: stomach)
(2) Do you suffer from the symptom of heartburn?
	1: yes	2: no
	(a: usually; b: sometimes)
(3) Do you suffer from the symptom of abdominal pain?
	1: yes	2: no
	(a: usually; b: sometimes)
	(f: before eating; g: after eating; h: no relation)