Facemasks are personal protective equipment worn to reduce the risk of the transmission of Covid-19. University students and teachers/lecturers in Serbia are required to wear facemasks in class at all times. However, such practice may cause challenges in student-teacher communication. We present students' experiences regarding speech intelligibility in the educational setting. We distributed an anonymous online questionnaire among students from various universities. Speaking with a facemask in class creates communication challenges for teachers and students alike. Students claim that teachers often have difficulties understanding students who speak wearing masks; teachers often ask students to repeat the sentence, and teachers often ask students to speak louder. Similarly, when teachers talk with their facemasks, students often report not hearing or understanding teachers back. In turn, students would ask teachers to repeat the sentence and raise voices. Students pay more attention to teachers' facial expressions, hand gestures, body language, and tone of voice. Students tend to engage their non-verbal interaction skills more often to facilitate communication. We further discuss the differences regarding students' gender and the type of facemask typically worn. We express concern that the inability to communicate clearly may cause annoyance and frustration in the academic setting.

As the existing data on the correlation of adiposity with adverse outcomes of carotid endarterectomy (CEA) are inconsistent, the aim of the present study is to examine the correlation of an increased body mass index with 30-day complications after carotid endarterectomy. The cohort study comprises 1586 CEAs, performed at the Clinic for Vascular Surgery in Belgrade, from 2012–2017. Out of them, 550 CEAs were performed in patients with normal body mass index (18.5–24.9), 750 in overweight (25.0–29.9), and 286 in obese (≥30) patients. The association of overweight and obesity with early outcomes of carotid endarterectomy was assessed using univariate and multivariate logistic regression analysis. Overweight patients, in whom CEAs were performed, were significantly more frequently males, compared to normal weight patients–Odds Ratio (OR) 1.51 (95% confidence interval– 1.19–1.89). Moreover, overweight patients significantly more frequently had non-insulin-dependent diabetes mellitus—OR 1.44 (1.09–1.90), and more frequently used ACEI in hospital discharge therapy—OR 1.41 (1.07–1.84) than normal weight patients. Additionally, the CEAs in them were less frequently followed by bleedings—OR 0.37 (0.16–0.83). Compared to normal weight patients, obese patients were significantly younger—OR 0.98 (0.96–0.99), and with insulin-dependent and non-insulin-dependent diabetes mellitus—OR 1.83 (1.09–3.06) and OR 2.13 (1.50–3.01) respectively. They also more frequently had increased triglyceride levels–OR 1.36 (1.01–1.83), and more frequently used oral anticoagulants in therapy before the surgery–OR 2.16 (1.11–4.19). According to the results obtained, overweight and obesity were not associated with an increased death rate, transient ischemic attack (TIA), stroke, myocardial infarction, or with minor complications, and the need for reoperation after carotid endarterectomy. The only exception was bleeding, which was significantly less frequent after CEA in overweight compared to normal weight patients.

A cohort study was conducted to examine the association of an increased body mass index (BMI) with late adverse outcomes after a carotid endarterectomy (CEA). It comprised 1597 CEAs, performed in 1533 patients at the Vascular Surgery Clinic in Belgrade, from 1 January 2012 to 31 December 2017. The follow-up lasted four years after CEA. Data for late myocardial infarction and stroke were available for 1223 CEAs, data for death for 1305 CEAs, and data for restenosis for 1162 CEAs. Logistic and Cox regressions were used in the analysis. The CEAs in patients who were overweight and obese were separately compared with the CEAs in patients with a normal weight. Out of 1223 CEAs, 413 (33.8%) were performed in patients with a normal weight, 583 (47.7%) in patients who were overweight, and 220 (18.0%) in patients who were obese. According to the logistic regression analysis, the compared groups did not significantly differ in the frequency of myocardial infarction, stroke, and death, as late major adverse outcomes (MAOs), or in the frequency of restenosis. According to the Cox and logistic regression analyses, BMI was neither a predictor for late MAOs, analyzed separately or all together, nor for restenosis. In conclusion, being overweight and being obese were not related to the occurrence of late adverse outcomes after a carotid endarterectomy.

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