GarcS~ao and Cabrita (A-13) wanted to evaluate the community pharmacist’s capacity to positively influence the results of antihypertensive drug therapy through a pharmaceutical care program in Portugal. Eighty-two subjects with essential hypertension were randomly assigned to an intervention or a control group. The intervention group received monthly monitoring by a research pharmacist to monitor blood pressure, assess adherence to treatment, prevent, detect, and resolve drug-related problems, and encourage nonpharmacologic measures for blood pressure control. The changes after 6 months in diastolic blood pressure (pre  post, mm Hg) are given in the following table for patients in each of the two groups.

Intervention Group Control Group 20 4 12 16 0 4 12 0 2 24 6 10 12 2 2 8 36 6 24 16 18 2 0 10 26 2 42 10 0 8 0 14 2 8 20 6 8 10 4 8 20 8 14 6 10 0 12 0 2 16 2 286 42 14 14 10 8 14 10 28 8 30 8 2 16 4 2 18 16 18 20 18 12 2 2 12 12 6 6 Source: Data provided courtesy of Jose GarcS~ao, M.S., Pharm.D.

On the basis of these data, what should the researcher conclude? Let a ¼ :05.