In the subset of patients with valid ambulatory BP , no difference in @-h average DBP -LSB- n = @ ; @ ( @ , @ ) zofenopril + HCTZ vs. @ ( @ , @ ) mmHg irbesartan + HCTZ , P = @ -RSB- and SBP reductions -LSB- @ ( @ , @ ) vs. @ ( @ , @ ) mmHg , P = @ -RSB- were observed between the two treatment groups .