Introduction: Following the Covid-19 pandemic, the face-to-face meetings are delayed to a future date , which is still not clear. However, seminars, meetings, and conferences are necessary for updating our knowledge and skills. The web-based seminars (webinars) are the solutions to this issue. This study aimed to show the participant behavior when webinars present at the Covid-19 pandemic era. Methods: Between December 2017 – July 2020, 58 webinars were broadcasted via the Uropedia, electronic library of SUST. Data of all webinars were collected with the YouTube analytics and application of the Uropedia. Data of streaming webinars included participant behaviors such as content views, engagement time, total unique attendees, average engagement time, and the number of audience to leads. Data were split into two groups; group-1 is webinars before Covid-19 (before March 2020), group-2 is the webinars during Covid-19. Results: Total broadcast time and total page view number were found to be 112.6 hours (6761 min.) and 15919, respectively. The median participant age was 40.1 years. Median content view and median engagement time were found to be 261.0 min., and 12.2 min., respectively. Comparison of two groups revealed a significant increment in the content views (group 1;134.0 range=86.0-87.0 and group 2; 414.0 range=296.0-602.0, p<0.001) and the number of the unique attendees (group 1; 18.0 range=10.0-26.0 and group 2; 57.0 range=27.0-100.0, p<0.001) following Covid-19. However, the median engagement time of the audience did not seem to change with the Covid-19 pandemic (group 1; 11.5 range=10.0-13.3 min. and group 2; 13.2 range=9.4-18.1 min., p=0.12). Conclusion: The webinars are effective ways to share information and have many advantages, including low cost, reaching the high number of audiences. Audience number and page visits seemed to increase following the Covid-19 pandemic. However, The engagement time did not seem to affect a critical attitude of the audience

Aims: To evaluate the diagnostic significance of the novel index combining preoperative hemoglobin, albumin levels, lymphocyte and platelet counts (HALP) in prostate cancer (PCa) patients. Methods: Between January 1, 2015 to December 31, 2018 at the Hitit University Erol Olçok Education and Research Hospital 225 patients who had undergone transrectal ultrasound guided prostate biopsy or prostate surgery were analyzed retrospectively. A total of patients; 155 had benign prostate hyperplasia (group 1) and 70 had PCa (group 2). The preoperative serum levels of hemoglobin, albumin, lymphocyte counts, and platelet counts were recorded. The HALP scores and the sub parameters of this index for each of the two groups were compared. Results: The total Prostate Specific Antigen (PSA), albumin and lymphocyte differences between the groups were statistically significant (p=0.0002, p=0.0001, p= 0.005). The median value of HALP scores in Group 1 and 2 were 49.43 and 51.2 respectively, and this was not statistically significant between groups (p=0.737). The HALP score had the least Area Under Curve (AUC) value compared to the others (0.514). the AUC of Albumin was larger than PSA for diagnostic efficacy in PCa patients (0.696-0.656). However, albumin levels were statistically significant compared to platelet count and the HALP score (p=0.0033, p=0.0068), except PSA and lymphocyte (p=0.4580, p=0.1717). Conclusion:Further prospective clinical studies that include more patients from multiple centers are needed to show the diagnostic role of the HALP score and its compounds on the patients with PCa.