This study was designed to determine whether lifestyle behaviors in treated hypertensives were predictive of blood pressure control. Sixty clients attending a hypertension outpatient clinic were interviewed regarding specific lifestyle behaviors, and a resting, supine blood pressure was recorded. Of the behaviors evaluated, analysis of variance showed that not smoking was significantly predictive (p=.0008) of having a controlled blood pressure. Medication compliance was suggestive of having controlled blood pressure but was not at a significant level (p=.0533). The findings support continued efforts of physicians and nurses to encourage hypertensive clients to discontinue smoking.