ABSTRACT
Recruiting and retaining sufficient participants is one of the biggest challenges researchers face while conducting clinical trials (CTs). This is due to the fact of misconceptions and insufficient knowledge concerning CTs among the public. The present cross-sectional study was conducted from April 2021 to May 2022. We evaluated knowledge and attitude among 480 participants using a pretested Arabic questionnaire. The correlation between knowledge and attitude score was tested through Spearman's correlation test, and the logistic regression test evaluated the associated factors for knowledge and attitude. Of the studied participants, 63.5% were male and belonged to the age group less than 30 years (39.6%). Nearly two-thirds (64.6%) of them had never heard of CT. More than half of the participants had poor knowledge (57.1%) and attitude (73.5%) towards CTs. Participants' knowledge scores were significantly associated with education level (p = 0.031) and previous participation in health-related research (p = 0.007). Attitude scores were significantly related to marital status (p = 0.035) and the presence of chronic diseases (p = 0.008). Furthermore, we found a significant positive correlation between knowledge and attitude scores (p < 0.001, Spearman's rho = 0.329). The present study revealed that most of the study population had poor knowledge and moderate attitudes towards CT. Targeted health education programs at different public places are recommended to improve the public's knowledge of the importance of CT participation. In addition, exploratory and mixed-methods surveys in other regions of KSA is required to recognize the region-specific health education needs.
ABSTRACT
Recruiting and retaining sufficient participants is one of the biggest challenges researchers face while conducting clinical trials (CTs). This is due to the fact of misconceptions and insufficient knowledge concerning CTs among the public. The present cross-sectional study was conducted from April 2021 to May 2022. We evaluated knowledge and attitude among 480 participants using a pretested Arabic questionnaire. The correlation between knowledge and attitude score was tested through Spearman's correlation test, and the logistic regression test evaluated the associated factors for knowledge and attitude. Of the studied participants, 63.5% were male and belonged to the age group less than 30 years (39.6%). Nearly two-thirds (64.6%) of them had never heard of CT. More than half of the participants had poor knowledge (57.1%) and attitude (73.5%) towards CTs. Participants' knowledge scores were significantly associated with education level (p = 0.031) and previous participation in health-related research (p = 0.007). Attitude scores were significantly related to marital status (p = 0.035) and the presence of chronic diseases (p = 0.008). Furthermore, we found a significant positive correlation between knowledge and attitude scores (p < 0.001, Spearman's rho = 0.329). The present study revealed that most of the study population had poor knowledge and moderate attitudes towards CT. Targeted health education programs at different public places are recommended to improve the public's knowledge of the importance of CT participation. In addition, exploratory and mixed-methods surveys in other regions of KSA is required to recognize the region-specific health education needs.
ABSTRACT
(1) Backgrounds and Objectives: The global battle to contain the severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) is still ongoing. This cross-sectional study aimed to detect the seroprevalence of anti-SARS-CoV-2 IgM/IgG among previously symptomatic/asymptomatic and vaccinated/unvaccinated inhabitants of Sakaka City, Aljouf, Saudi Arabia. (2) Methods: Blood samples of 400 participants were tested for the presence of anti-SARS-CoV-2 IgM/IgG using colloidal gold immuno-chromatography lateral flow immunoassay cards. (3) Results: The prevalence of anti-SARS-CoV-2 IgM and IgG positivity was 45.8% and 42.3%, respectively. Statistically significant correlations (p < 0.05) were found between the previous RT-PCR testing for SARS-CoV-2-RNA and positivity for IgM and/or IgG. The highest seroprevalence of IgM and IgG were detected among smokers, participants aged ≥40 years, and patients with chronic diseases. Although most of the participants (58.5%) did not previously experience COVID-19 like symptoms, the anti-SARS-CoV-2 IgM and IgG seropositivity amongst them was 49.1% and 25.6%, respectively, with higher seroprevalence among males than females. At the time of the study, the SARS-CoV-2 vaccination rate at our locality in Saudi Arabia was 43.8% with statistically significant correlation (p < 0.001) between being vaccinated and anti-SARS-CoV-2 IgM and/or IgG positivity, with more positivity after receiving the second vaccine dose. (4) Conclusions: Public assessment reflects the real scale of the disease exposure among the community and helps in identifying the asymptomatic carriers that constitute a major problem for controlling the SARS-CoV-2. To limit the spread of the virus, rigorous implementation of large-scale SARS-CoV-2 vaccination and anti-SARS-CoV-2 serological testing strategies should be empowered.
ABSTRACT
BACKGROUND: We previously tested two angiotensin-converting enzyme (ACE) inhibitors and two dipeptidyl peptidase-4 (DPP-4) inhibitors for dual enzyme inhibitory effect. Only two DPP-4 inhibitors, linagliptin and sitagliptin, were able to inhibit ACE. OBJECTIVE: In the present study, we investigated if other inhibitors of ACE or DPP-4 could simultaneously inhibit the activities of both DPP-4 and ACE. METHODS: Forty Sprague Dawley rats were used. The control group received only saline. The other three groups were treated with anagliptin, ramipril, or lisinopril. Two different doses were tested separated with a 6-day drug-free interval. Angiotensin II (Ang II) levels and the activities of ACE and DPP-4 were measured from blood samples at baseline and days 1, 10, and 14. After the oral glucose challenge test, levels of the active form of glucagon-like peptide-1 (GLP-1) were measured. RESULTS: Regardless of the dose, anagliptin did not show any inhibitory effect on the activity of ACE or Ang II levels. Concerning ramipril and lisinopril, only a high dose of lisinopril was able to produce a modest reduction of the DPP-4 activity but not enough to inhibit the inactivation of GLP-1. CONCLUSION: It seems that while most of the ACE inhibitors cannot affect DPP-4 activity, inhibitors of DPP-4 vary in their effects on ACE activity. The selection of DPP-4 inhibitors under different clinical situations should take into account the action of these drugs on ACE.