Brain activity following esophageal acid infusion using positron emission tomography

Table 1 Incidence of heartburn symptoms and heartburn scores induced by each infusion

	Heartburn incidence	Mean heartburn scores (range)
pH 7 (first infusion)	5/15	1.4 (0-7)
pH 7 (second infusion)	5/15	1.0 (0-6)
pH 2	7/15	1.9 (0-9)b
pH 1 (first infusion)	10/15	3.2 (0-10)c
pH 1 (second infusion)	12/15a	5.0 (0-10)d

^aP = 0.0253 vs pH 7 (first infusion) and pH 7 (second infusion);

^bP = 0.0269 vs pH 7 (second infusion);

^cP = 0.0464 vs pH 7 (first infusion), P = 0.0253 vs pH 7 (second infusion);

^dP = 0.0040 vs pH 1 (first infusion), P = 0.0075 vs pH 2, P = 0.0041 vs pH 7 (first infusion), P = 0.0071 vs pH 7 (second infusion).