Introduction: Recent studies show that treatment of arterial hypertension is unsuccessful. This is due to the patients' insufficient knowledge of about the therapeutic methods and the consequences of not treating arterial hypertension. Objectives: The aim of the study was to evaluate the patients' knowledge concerning therapeutic options, prophylaxis, and complications of arterial hypertension. The study also assessed the effect of such knowledge on hypertension treatment adherence and efficacy. Patients and Methods: The survey included 488 patients (250 female and 238 male), aged over 18 years, diagnosed with and treated in outpatient and inpatient settings at selected healthcare institutions in Poland. A custom-made questionnaire, based on references on this subject, was the key tool in the present study. Information about the course of the disease and evaluation of hypertension treatment efficacy was based on the patients' medical records. Results: The study found that 54.7% of the subjects had good knowledge about arterial hypertension, 40.0% had average knowledge, and 5.3% had poor knowledge. The extent of knowledge about the disease was significantly dependent on the level of education and the place of receiving medical care (p< 0.05). Good knowledge was significantly associated with controlled blood pressure, number of antihypertensive drugs used, frequency of hospitalization, as well as with medication adherence, and healthy lifestyle behaviours (p< 0.05). Conclusions: More than half of the patients presented good knowledge but a large group still had poor knowledge, especially patients with a low level of education and with hypertension treated at a general practitioner's clinic. The results of our study clearly show that knowledge about arterial hypertension affects medication adherence and healthy lifestyle behaviours and improves hypertension treatment efficacy.

The aim of the study was to compare the safety profiles (prevalence of both local and systemic side effects) of COVID-19 vaccines (Pfizer–BioNTech, Moderna, Oxford–AstraZeneca) among healthcare workers (doctors, nurses, and pharmacists) administered with a first and a second dose of the vaccines. Another goal of the research was to evaluate potential demographic and clinical risk factors for the frequency and intensity of side effects. A post-marketing, cross-sectional survey-based study was carried out on a sample of 971 respondents (323 doctors, 324 nurses, and 324 pharmacists), all more than 18 years old, who have taken two doses of the following SARS-CoV-2 vaccines: BNT162b2 (Pfizer–BioNTech) (group 1), mRNA-1273 (Moderna) (group 2), and ChAdOx1 nCoV-19 (Oxford–AstraZeneca) (group 3). A validated, self-administered questionnaire was developed and delivered online to the target population group of healthcare workers. The survey was conducted during the third wave of the COVID-19 (1 February 2021–1 July 2021) pandemic. It was based on the CAWI (computer-assisted web interview) method. Questionnaires were disseminated using selected social media. The BNT162b2 (Pfizer–BioNTech) vaccine was the most commonly administered COVID-19 vaccine among healthcare professionals in Poland (69.61%). Side effects following a SARS-CoV-2 vaccine were reported by 53.11% of respondents in group 1, 72% in group 2, and 67.59% in group 3. The following were the most common side effects regardless of the type of vaccine administered: pain at the injection site, headache, muscle pain, fever, chills, and fatigue. The number and intensity of reported side effects following administration of a BNT162b2 (Pfizer–BioNTech) vaccine were significantly lower than in the other two study groups (p < 0.00001). Risk factors for side effects following administration of one of the SARS-CoV-2 vaccines subject to the analysis included being female, young, and suffering from a diagnosed allergy. Our results clearly show that the short-term safety profiles of the eligible COVID-19 vaccines (Pfizer–BioNTech, Moderna, Oxford–AstraZeneca) are acceptable. Nevertheless, the two-dose COVID-19 vaccines available in Poland differ significantly in the frequency of both local and systemic side effects and their intensity. Women, young people, and patients diagnosed with allergies are particularly exposed to the risk of side effects. Further studies are needed to determine the long-term safety profile of COVID-19 vaccines.

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