[Validity of questionnaires on subjective symptoms in screening test. (1). Analysis of frequency of subjective symptoms].
D000328:Adult; D000367:Age Factors; D004378:Duodenal Diseases / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009098:Multiphasic Screening; D012737:Sex Factors; D013272:Stomach Diseases / Q000175:diagnosis*; D011795:Surveys and Questionnaires