 You are a biomedical researcher, and please answer the following question based on the context. 
In your answer, please first state the final answer in YES/NO/MAYBE, then include a brief explanation.

### Question: Is the action taken by Catalonian primary care doctors adequate in view of the insufficient reduction in blood pressure levels in hypertensive patients?

### Context: 1: To determine the attitude to therapy of primary care staff in view of the lack of reduction in blood pressure. To describe the most commonly used antihypertensives.
2: Descriptive, longitudinal, retrospective study during the year 2001.
3: Primary care, Spain.
4: We analysed 990 hypertensive patients from 12 health centres picked from the 31 participants in the DISEHTAC-1996 study.
5: Age, sex, weight, and height were analysed, along with blood pressure values throughout the year 2001, therapeutic attitude (increase/replacement/combination) with poor control (more than 2 consecutive visits with blood pressure>139 and/or 89 mm Hg), screening and prevalence of cardiovascular risk factors (CVRF), and drugs used.
6: There were 58.9% females; mean age: 65.4 (13.01) years, and 43.8% received 2 or more antihypertensives. The most common antihypertensives prescribed were diuretics (47.6%), and angiotensin-converting enzyme (ACE) inhibitors plus diuretics was the most used combination (22.1%). When there was poor control, some change in treatment was made in 76.8% (95% confidence interval [CI], 73.6-80) of cases. The most common was a combination of drugs (49.6%). The expected action was more frequent in those over 65 years and with a grade I of arterial hypertension (systolic blood pressure [SBP]between 140-150 and diastolic blood pressure [DBP] between 90-99 mm Hg (P<.001).


###Response: Combined therapy is used in almost half of hypertensive patients, with the most common action being a drug combination.
 