Browsing by Author "Backović, Dušan (12773755100)"

Introduction: Internet use (IU) commonly refers to sedentary lifestyle and may be addictive, especially among children. The aim of this study was to investigate the relationship between IU and some aspects of child physical and psychosocial development. Methodology: We conducted a cross-sectional survey by using a screen-time based sedentary behavior questionnaire and Strengths and Difficulties Questionnaire (SDQ)—among 836 primary school children in the Braničevo District. The children’s medical records were analysed for vision problems and spinal deformities. Their body weight (BW) and height (BH) were measured and body mass index (BMI) was calculated as BW in kilograms divided by BH in meters squared (kg/m2). Results: The average age of respondents was 13.4 (SD 1.2) years. The mean duration of daily Internet use and sedentary behavior was 236 (SD 156) and 422 (SD 184) minutes, respectively. There was no significant correlation between daily IU and vision problems (near sightedness, farsightedness, astigmatism, strabismus), and spinal deformities. However, daily Internet use is significantly associated with obesity (p < 0.001) and sedentary behavior (p = 0.01). There was significant correlation between emotional symptoms with total Internet usage time, and total sedentary score (p < 0.001 for both, r = 0.141 and r = 0.132, respectively). There was a positive correlation between the total sedentary score of children and hyperactivity/inattention (r = 0.167, p < 0.001), emotional symptoms (r = 0.132, p < 0.001), and conduct problems (r = 0.084, p < 0.01). Conclusion: In our study, children’s Internet use was associated with obesity, psychological disturbances and social maladjustment. Copyright © 2023 Novaković, Milenković, Srećković, Backović, Ignjatović, Capo, Stojanović, Vukomanović, Sekulić, Gavrilović, Vuleta and Ignjatović.

Aim: The aim of this study was to determine differences in psychosocial context of occurrence of cigarette smoking and alcohol and drugs use between adolescents living in foster homes and those living with parents. Methods: The study examined 58 adolescents (14-17 years) living in foster homes and 245 living with parents using an anonymous questionnaire. Findings: Consumption of tobacco and cannabis was more common in the group of children living in foster homes. They tried these substances earlier and used them more frequently. The most important predictor for current smoking was the number of peers who smoked. Another important predictor of current smoking was an expressed feeling of loneliness. The studied groups did not differ significantly in the occurrence of alcohol drinking. Conclusions: These results suggest that suitable prevention programmes with emphases on social groups living under adverse conditions are needed. Further research should be conducted to give more detailed insight into the reasons and psychosocial factors that precipitate the start and perpetuation of these habits in diverse environments. © 2006 Informa UK Ltd.

Aim: The aim of this study was to determine differences in psychosocial context of occurrence of cigarette smoking and alcohol and drugs use between adolescents living in foster homes and those living with parents. Methods: The study examined 58 adolescents (14-17 years) living in foster homes and 245 living with parents using an anonymous questionnaire. Findings: Consumption of tobacco and cannabis was more common in the group of children living in foster homes. They tried these substances earlier and used them more frequently. The most important predictor for current smoking was the number of peers who smoked. Another important predictor of current smoking was an expressed feeling of loneliness. The studied groups did not differ significantly in the occurrence of alcohol drinking. Conclusions: These results suggest that suitable prevention programmes with emphases on social groups living under adverse conditions are needed. Further research should be conducted to give more detailed insight into the reasons and psychosocial factors that precipitate the start and perpetuation of these habits in diverse environments. © 2006 Informa UK Ltd.

Previous studies conducted in Yugoslavia indicated that the concentration of selenium in soil, food items, and serum of the population is very low. The aim of the study was to investigate the possible relationship among environmental, health-related habits, nutrition, and selenium serum levels in cancer patients and the healthy population. The case-control study included a group of cancer patients and a matched group of healthy controls: 57 cancer patients and 41 healthy controls living in Stari Grad (an urban area of Belgrade), as well as 17 cancer patients and 13 healthy controls living in Barajevo (a rural community in the vicinity of Belgrade). The healthy controls were matched to cancer patients in sex and age; they were not blood related. The selenium serum levels were measured by atomic absorption spectrophotometry. Health-related habits and relevant dietary factors ('food frequency' method) that may influence the selenium serum levels were assessed by questionnaires. The differences in average values of selenium serum levels between the cancer patients and healthy controls were not significantly different, but both were below the lowest recorded in referential studies. A significant difference between the values obtained from urban and rural subgroups was noted. The most important factors that influenced the level of selenium included the residence place in the region with selenium deficiency (Barajevo), age, associated chronic diseases, and some dietary factors potentially related to the intake of selenium. The results obtained in this investigation pointed out that use of selenium supplementation in this area should be seriously considered.

Previous studies conducted in Yugoslavia indicated that the concentration of selenium in soil, food items, and serum of the population is very low. The aim of the study was to investigate the possible relationship among environmental, health-related habits, nutrition, and selenium serum levels in cancer patients and the healthy population. The case-control study included a group of cancer patients and a matched group of healthy controls: 57 cancer patients and 41 healthy controls living in Stari Grad (an urban area of Belgrade), as well as 17 cancer patients and 13 healthy controls living in Barajevo (a rural community in the vicinity of Belgrade). The healthy controls were matched to cancer patients in sex and age; they were not blood related. The selenium serum levels were measured by atomic absorption spectrophotometry. Health-related habits and relevant dietary factors ('food frequency' method) that may influence the selenium serum levels were assessed by questionnaires. The differences in average values of selenium serum levels between the cancer patients and healthy controls were not significantly different, but both were below the lowest recorded in referential studies. A significant difference between the values obtained from urban and rural subgroups was noted. The most important factors that influenced the level of selenium included the residence place in the region with selenium deficiency (Barajevo), age, associated chronic diseases, and some dietary factors potentially related to the intake of selenium. The results obtained in this investigation pointed out that use of selenium supplementation in this area should be seriously considered.

The municipality of Bogatić, part of Mačva District, belongs to the Pannonian Basin, where high concentrations of arsenic in artesian wells were detected. Numerous epidemiological studies have confirmed the association of exposure to arsenic in drinking water and bladder cancer (C67). This retrospective ten-year analysis included age-standardized incidence rates (ASRs) and age-specific incidence rates of C67 in the municipality of Bogatić and rural municipalities of Mačva District. The concentration of arsenic in drinking water was determined at Šabac Public Health Institute (PHI) laboratories in 2015. ASRs were estimated using data from regional cancer registries at Šabac PHI and compared by use of the Mann-Whitney U test. Control population was recruited from an area where there were no artesian wells or hydrogeological conditions that would indicate elevated concentrations of arsenic in drinking water. Arsenic levels in all artesian wells in Bogatić municipality were 1.4 to 41 times higher than the maximum permissible concentration (mean 120 μg/L±165). Female subjects from Bogatić municipality had higher ASRs of C67 compared with the populations in rural municipalities of Mačva District (p<0.01), while the incidence of bladder cancer was by 13% greater than that in central Serbia (standardized incidence ratio, 113; 95% CI 96.97-131.35). Male subjects from Bogatić municipality had higher ASRs of C67 but the difference was not statistically significant (p>0.05). Our analyses suggested that exposure to arsenic in drinking water could triple the risk of bladder cancer. These results support the conclusions of previous studies that there may be an association between higher concentrations of arsenic in drinking water and higher ASRs of bladder cancer in both male and female subjects. © 2024, Dr. Mladen Stojanovic University Hospital. All rights reserved.

Introduction/Objective Knowledge and practical skills in medical waste (MW) management are of equal importance for medical and dental doctors. The first comparative study on the knowledge and skills in the field of MW management among Belgrade students was conducted with the goal of examining whether students of medicine and dentistry are equally familiar with this extremely important field. Methods A cross-sectional study included 558 students of the sixth year of studies (430 medical and 128 dental students) who completed an anonymous semi-structured questionnaire to determine attitudes and knowledge on MW management. Results The majority of medical and dental students had no training in MW management (79.5% and 74.6%, respectively). Dental students use protective equipment more frequently than medical students (94.5% vs. 42%, p < 0.001). However, full vaccinal protection against hepatitis B is better among medical students compared to dental students (57.7% vs. 39.1%, p < 0.001). Complete knowledge on postexposal prophylaxis is better among medical students compared to dental students (44.5% vs. 13.3%, p < 0.001). However, dental students are more disciplined in reporting injuries (63.1% vs. 52.4%, p = 0.038). The students’ knowledge on primary separation of infectious waste (93% vs. 77.8%, p < 0.001) and used needles (80.3% vs. 70.4%, p = 0.007) is better among dental students compared to medical students’ correct answers. Conclusion Dental students show better knowledge on MW management and are more disciplined in using personal infection protection compared to medical students. The students support continued training on MW management and investigations on this topic. © 2019, Serbia Medical Society. All rights reserved.

Background: High levels of environmental noise may lead to psychological symptoms. The present study has hypothesized that personal listening device (PLD) use and a negative attitude to noise are significantly related to anxiety and/or depression. Methods: This is a cross-sectional study conducted on 431 six-grade students (35% male) at the Faculty of Medicine, University of Belgrade. All students completed the questionnaires related to socio-demographic data, noise/music exposure habits, behaviors related to PLD use, tinnitus, headaches, consumption of alcohol, coffee, energy drinks and cigarettes, YANS (Youth Attitude to Noise Scale), CES-D (The Center for Epidemiologic Studies Depression), and GAD–7 (Generalised Anxiety Disorder Assessment − 7 item scale) questionnaires. Results: There were 396 (91.9%) of investigated students who used PLD, with more frequent use among girls compared to boys (95.0% and 86.8%, respectively; p = 0.002). We found no significant relationship between the frequency of PLD use and depression and anxiety. However, continuous daily PLD use longer than 1 hour was significantly and positively related to depression (p = 0.006). Students with depression had a lower total YANS score compared to those without depression, indicating a more negative attitude toward noise (p = 0.042). Students with no difficulties to concentrate in noise and with a positive attitude to daily noises had about 37% lower chance to suffer from depression and anxiety, respectively. Conclusions: PLD use is common among medical students and may be associated with their mental health. Longer than 1 hour of continuous daily use of PLD may be positively related to depression. We also found a significant relationship between difficulties concentrating in noisy environments and depression, and between negative attitudes to daily noises and anxiety. © 2023 Noise & Health | Published by Wolters Kluwer - Medknow.

Introduction/Objective Problematic internet use has been associated with various mental health prob-lems. The objective of this study was to investigate the internet use and its relationship with depressive symptoms among high school students. Methods This cross-sectional observational study included 620 students from the first to the fourth grade of four high schools in Požarevac, Serbia. The research data were obtained from an ad hoc designed questionnaire on socio-demographic data, health habits, and the internet use, Internet Addiction Test (IAT) and Center for Epidemiological Studies Depression Scale for Children (CES-DC). Results Out of 620 students (66.9% girls) there were 389 respondents (62.7%) who reported normal (n = 40), or average internet use (n = 349) with a mild level of addiction, while 226 (36.5%) subjects belonged to problematic internet use group, and five students (0.8%) showed a high level of internet addiction. A CES-DC score ≥ 15, considered indicative of clinically significant depressive symptoms, was found significantly more frequent among internet addicts compared to internet normal users (78.4% vs. 46.5%, respectively). Among internet addicts there was a significantly higher percentage of those who used psychologist/psychotherapist help compared to internet normal users (29.4% vs. 12.1%, respec-tively). The logistic regression analysis showed that internet addiction (IAT score ≥ 50) was the strongest independent predictor of clinically significant depressive symptoms (OR = 3.32; 95% CI = 2.24–4.91), after adjusting for confounders (female gender, urban living, Tik Tok and Twitter use, sports activities, and the use of the internet for learning or for aimless “surfing”). Conclusion We show that internet addiction is positively related to clinically significant depressive symptoms among high school students. Health education focused on the proper use of the internet may be regarded as mental health promotion. © 2023, Serbia Medical Society. All rights reserved.