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Adherence to the antihypertensive therapy – a view from the family medicine perspective

To check adherence to the antihypertensive medication in patients with arterial hypertension and a possible impact of fixed-dose drug combinations, cardiovascular event in history, and diabetes on it. In this cross-sectional study, every fifth patient with arterial hypertension in two family medicine practices in Zagreb, Croatia (found by Medicus search engine) was analyzed during February 2022. We included medical records of 210 patients (116 males, 94 females) from which we checked the number and type of used antihypertensive medication (single pill or fixed- dose drug combinations), statin use, diabetes type 2 or cardiovascular event in history, and the date of the last lab test results. The patient was considered adherent if she/he regularly ordered hers/his prescribed medication from January to December 2021. Chi-square and Student t-test were used for statistical analysis in Statistica 12. There were no differences between genders. Women were slightly more adherent to the prescribed therapy than men (72.34 vs. 68.11%, P = 0.5076). Statins were prescribed in 65 (30.95%), fixed-dose combination in 139 (66.19%), 39 had diabetes (18.57%), and 28 patients had cardiovascular events in their medical history (13.33%). The adherence was not dependent on the patient’s age (66.75 vs. 66.64 years in adherent patients, P = 0.9509), the existence of diabetes (Chi2 = 1.093, 2, P = 0.2958) or previous cardiovascular event in medical history (Chi2 = 0.384, 2, P = 0.5351). Adherence correlated with the number of prescribed antihypertensive medications (r = 0.263 ; P < 0.05 ; and average 2.56 in adherent vs. 1.97 medication per day in non-adherent group, P < 0.001), especially if the therapy was in fixed-dose combination (Chi2 = 11.60, 2, P < 0.001). The age of the lab test results was less in adherent patients (1.25 vs. 1.86 years, P = 0.108). 116 patients (55.24%) had them in 2021, while 16 did not have any result in five and more years (7.14%). The adherence to antihypertensive therapy was similar between genders and correlated with the number of prescribed medications with significantly better results in patients with fixed-dose combinations. The existence of the previous cardiovascular event and type 2 diabetes did not show any benefit on this type of adherence.

Arterial Hypertension ; Family Medicine

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