RESULTS	Intraesophageal pH was < 4.0 for mean values of < 5 % of the monitoring period with all the three dosing regimens , but esophageal pH remained < 4.0 for > 5 % of the time in 16 % , 23 % , and 19 % of patients receiving esomeprazole 40 mg t.i.d. , 40 mg b.i.d. , and 20 mg t.i.d. , respectively .\