Browsing by Author "Jakovljevic, B. (8412749400)"

Aim: The aim of the present study was to investigate the association of the body mass index (BMI) and waist circumfe rence (WC) with the radiographic severity of knee osteoar thritis (rKOA) Methods: A cross-sectional study had been applied during this research which included 150 patients diagnosed at the General Hospital in Užice and Health Center in Arilje (Serbia). The study included patients over the age of 50, diagnosed with OA according to The European League Against Rheumatism (EULAR) criteria. Data on social-demographic characteristics, health habits, and personal and family histories of the partici - pants were collected through a specific questionnaire designated for this research. The severity of the disease was assessed pursuant to radiological changes using the Kellgren-Lawrence grading scale (K-L). The state of nou - rishment was assessed according to the BMI and WC. Results: According to multivariate logistic regression analyses, after adjustment for age, sex, marital status, formal education, present occupation, smoking, al - cohol consumption and physical activity; higher grades of rKOA (grade III and grade IV) were significantly related to BMI (p = 0.038) and WC (p < 0.001). The association was much stronger for obesity defined as BMI ≥30 kg/m2 (p = 0.002) and for abdominal obesity - WC > 102 cm in men and > 88 cm in women (p = 0.009). Conclusion: This study showed that obesity defined as BMI ≥30 kg/m2 and abdominal obesity are strongly related to K-L of rKOA, with the associations being of very similar extent.

The contradictory and confusing results in noise research on humans may partly be due to individual differences between the subjects participating in different studies. This review is based on a twelve year research on the role of neuroticism, extroversion and subjective noise sensitivity during mental work in noisy environment. Neurotic persons might show enhanced "arousability" i.e. their arousal level increases more in stress. Additional unfavorable factors for neurotics are worrying and anxiety, which might prevent them coping successfully with noise, or some other stressors during mental performance. In numerous experiments introverts have showed higher sensitivity to noise during mental performance compared to extroverts, while extroverts often cope with a boring task even by requesting short periods of noise during performance. Correlation analyses have regularly revealed a highly significant negative relation between extroversion and noise annoyance during mental processing. Numerous studies have shown that people with high noise sensitivity may be prevented from achieving the same work results as other people in noisy environment, thus leading to psychosomatic, neurotic or other difficulties. Positive relation between noise annoyance and subjective noise sensitivity might be very strong. Our results have shown, after matching with the results of other relevant studies, that more stable personality, with extroversive tendencies and with a relatively lower subjective noise sensitivity measured with standard questionnaires, may be expected to better adapt to noise during mental performance, compared to people with opposite personality traits.

The contradictory and confusing results in noise research on humans may partly be due to individual differences between the subjects participating in different studies. This review is based on a twelve year research on the role of neuroticism, extroversion and subjective noise sensitivity during mental work in noisy environment. Neurotic persons might show enhanced "arousability" i.e. their arousal level increases more in stress. Additional unfavorable factors for neurotics are worrying and anxiety, which might prevent them coping successfully with noise, or some other stressors during mental performance. In numerous experiments introverts have showed higher sensitivity to noise during mental performance compared to extroverts, while extroverts often cope with a boring task even by requesting short periods of noise during performance. Correlation analyses have regularly revealed a highly significant negative relation between extroversion and noise annoyance during mental processing. Numerous studies have shown that people with high noise sensitivity may be prevented from achieving the same work results as other people in noisy environment, thus leading to psychosomatic, neurotic or other difficulties. Positive relation between noise annoyance and subjective noise sensitivity might be very strong. Our results have shown, after matching with the results of other relevant studies, that more stable personality, with extroversive tendencies and with a relatively lower subjective noise sensitivity measured with standard questionnaires, may be expected to better adapt to noise during mental performance, compared to people with opposite personality traits.

Aim. The aim of this study was to extend the analysis of the systolic right ventricular (RV) adaptation to combined endurance and strength training, to assess the utility of tissue Doppler imaging in detecting the degree of these changes and to find independent RV predictors of the maximal functional capacity. Methods. Standard Doppler and TDI were used to assess cardiac parameters at rest in 37 elite male athletes (16 wrestlers, 21 water polo players) and 20 sedentary subjects of similar age. Progressive maximal test on treadmill was used to assess VO2max The obtained parameters were adjusted for HR, FFM, and BSA. Results. Wrestlers showed higher VO 2max than controls, but lesser than water polo players. RV diameter was larger in athletes. Right atrial pressure (RVE/e) was higher in water polo players than in other groups. Systolic function assessed by tricuspid annular plane systolic excursion (TAPSE) and RVs' was the highest in wrestlers. Global RV systolic parameters myocardial performance index (MPI) and preejection time/ ejection time index (PET/ET) were similar. On multivariate analysis systolic parameters were independent predictors of VO2max only in wrestlers: RVs' (beta=3.18, P=0.001) and RV ET (beta=2.32, P=0.001). RVE/e correlated with RVs' (r=-0.57, P=0.000). TAPSE correlated with RV ET (r=0.32, P=0.015) and RVs (beta=0.28, P=0.033). Conclusion. Systolic function assessed by TAPSE and RVs has more improved in less endurance athletes. RVs and TDI ejection time predict VO2max in wrestlers, and possibly in other athletes with lesser right atrial pressure. TDI enables quantifying RV adaptation degree in athletes, but complementary to M-mode technique.

Aim. The aim of this study was to extend the analysis of the systolic right ventricular (RV) adaptation to combined endurance and strength training, to assess the utility of tissue Doppler imaging in detecting the degree of these changes and to find independent RV predictors of the maximal functional capacity. Methods. Standard Doppler and TDI were used to assess cardiac parameters at rest in 37 elite male athletes (16 wrestlers, 21 water polo players) and 20 sedentary subjects of similar age. Progressive maximal test on treadmill was used to assess VO2max The obtained parameters were adjusted for HR, FFM, and BSA. Results. Wrestlers showed higher VO 2max than controls, but lesser than water polo players. RV diameter was larger in athletes. Right atrial pressure (RVE/e) was higher in water polo players than in other groups. Systolic function assessed by tricuspid annular plane systolic excursion (TAPSE) and RVs' was the highest in wrestlers. Global RV systolic parameters myocardial performance index (MPI) and preejection time/ ejection time index (PET/ET) were similar. On multivariate analysis systolic parameters were independent predictors of VO2max only in wrestlers: RVs' (beta=3.18, P=0.001) and RV ET (beta=2.32, P=0.001). RVE/e correlated with RVs' (r=-0.57, P=0.000). TAPSE correlated with RV ET (r=0.32, P=0.015) and RVs (beta=0.28, P=0.033). Conclusion. Systolic function assessed by TAPSE and RVs has more improved in less endurance athletes. RVs and TDI ejection time predict VO2max in wrestlers, and possibly in other athletes with lesser right atrial pressure. TDI enables quantifying RV adaptation degree in athletes, but complementary to M-mode technique.