@-h median -LSB- IQ -RSB- percentages of time with gastric pH above @ and @ were higher with rabeprazole than omeprazole ( @ -LSB- @-@ -RSB- vs. @ -LSB- @-@ -RSB- % , @ -LSB- @-@ -RSB- % for placebo ) but the differences did not reach statistical significance ( p = @ and @ , respectively ) .