Table 3.

 Likelihood of pathological pH monitoring according to number of positive responses on the four item heartburn questionnaire in 247 patients with functional dyspepsia

Positive responses on heartburn questionnaire	Odds ratio	95% CI	p Value
1	1.880	1.034–3.653	0.02
2	3.940	1.838–8.445	0.0004
3	6.771	3.052–15.020	<0.0001
4	28.388	8.872–90.836	<0.0001