Browsing by Author "Davidovic, Mladen (9940513000)"

In the past couple of centuries, scientists proposed great number of aging theories but neither of them appears to be fully satisfactory. In the statistical sense, we are dealing with an even greater challenge because large array of factors affects the aging process. Although at this point the most of these factors are well known, it is the very fact of their innumerability that complicates approaches to the issue at hand. Both in life and in medicine, the cause behind an effect can rarely be unequivocally determined. Thus, it appears that through out human history longevity has been primarily affected by eradication of diseases, especially by eradication of infectious diseases and introduction of the vaccines. For that reason, maybe we should not be referring to this issue as the «fountain of youth» but rather as the «vaccine of youth». The postulate that genetic instability is the precipitating factor both of aging and cancer has withstood many tests and keeps on being reaffirmed. For this reason, it is legitimate to pose a question of whether long-lived individuals may be those with «selfish» genes and more stable genetic material. They certainly cannot avoid aging, but aging in such individuals could be delayed due to steady character of their genome, which is less susceptible to mutations. On the population level, they constitute minority because stable genome would represent an obstacle to successful evolution of the species. If this was not the case, we might not be writing all these texts today.

In the past couple of centuries, scientists proposed great number of aging theories but neither of them appears to be fully satisfactory. In the statistical sense, we are dealing with an even greater challenge because large array of factors affects the aging process. Although at this point the most of these factors are well known, it is the very fact of their innumerability that complicates approaches to the issue at hand. Both in life and in medicine, the cause behind an effect can rarely be unequivocally determined. Thus, it appears that through out human history longevity has been primarily affected by eradication of diseases, especially by eradication of infectious diseases and introduction of the vaccines. For that reason, maybe we should not be referring to this issue as the «fountain of youth» but rather as the «vaccine of youth». The postulate that genetic instability is the precipitating factor both of aging and cancer has withstood many tests and keeps on being reaffirmed. For this reason, it is legitimate to pose a question of whether long-lived individuals may be those with «selfish» genes and more stable genetic material. They certainly cannot avoid aging, but aging in such individuals could be delayed due to steady character of their genome, which is less susceptible to mutations. On the population level, they constitute minority because stable genome would represent an obstacle to successful evolution of the species. If this was not the case, we might not be writing all these texts today.

Purpose: Previous research has shown that poor health-related quality of life (HRQOL) is associated with adverse long-term prognosis in patients with heart failure (HF); however, there have been inconsistencies among studies and not all of them confirmed the prognostic value of HRQOL. In addition, few studies involved elderly patients and most focused on all-cause mortality and HF-related hospitalization as outcomes. The aim of our study was to determine whether HRQOL is a predictor and an independent predictor of long-term cardiac mortality, all-cause mortality, and HF-related rehospitalization in elderly patients hospitalized with HF. Patients and methods: This prospective observational study included 200 elderly patients hospitalized with HF in Serbia. HRQOL was measured using the Minnesota Living with Heart Failure questionnaire (MLHFQ). The median follow-up period was 28 months. The primary outcome was cardiac mortality, and all-cause mortality and HF-related rehospitalization were secondary outcomes. Survival analysis was conducted using the Kaplan–Meier method and Cox-proportional hazards regression. Results: Subjects with poor HRQOL (higher than the median MLHFQ score) had a higher probability of cardiac mortality (P=0.029) and HF-related rehospitalization (P=0.001) during long-term follow-up. Poor HRQOL was an independent predictor of cardiac mortality (HR: 2.051, 95% CI: 1.260–3.339, P=0.004), all-cause mortality (HR: 1.620, 95% CI: 1.076–2.438, P=0.021), and HF-related rehospitalization (HR: 2.040, 95% CI: 1.290–3.227, P=0.002). Conclusion: HRQOL is an independent predictor of long-term cardiac mortality in elderly patients hospitalized with HF. It also independently predicts all-cause mortality and HF-related rehospitalization. HRQOL could be used as a complementary clinical predictive tool in this patient population. © 2019 Erceg et al.

Objective: To determine whether arm and upper body exercises in addition to the standard rehabilitation programme improve outcomes after hip arthroplasty. Design: Prospective, parallel, randomized, controlled trial. Setting: Orthopaedic and rehabilitation departments. Subjects: A total of 70 patients >60 years of age, who underwent hip replacement, out of 98 eligible candidates after exclusion criteria were implemented. Interventions: The study group took part in the supplementary arm and upper body exercise programme to be compared with the standard rehabilitation programme group. Main outcome: The primary outcome was a Harris Hip Score. Secondary outcomes were: Hand grip strength and Medical Outcomes Study 36-Item Short-Form Health Survey. Outcomes were assessed preoperatively, two weeks after surgery and at 12 weeks follow-up. Results: In the intervention group, significant improvements were found: in functional ability - Harris Hip Score after two (mean difference = 4.7 points) and 12 (mean difference = 5.85 points) weeks; in muscle strength - handgrip for both hands (mean difference for dominant hand = 4.16 and for the other hand = 2.8) after 12 weeks; and in role-physical dimension SF-36 Health Survey (mean difference = 6.42 points) after 12 weeks. Conclusion: Results of this study indicate that arm and upper body exercises in addition to the standard rehabilitation programme improve outcomes 12 weeks after hip arthroplasty. © The Author(s) 2016.

Objective: To determine whether arm and upper body exercises in addition to the standard rehabilitation programme improve outcomes after hip arthroplasty. Design: Prospective, parallel, randomized, controlled trial. Setting: Orthopaedic and rehabilitation departments. Subjects: A total of 70 patients >60 years of age, who underwent hip replacement, out of 98 eligible candidates after exclusion criteria were implemented. Interventions: The study group took part in the supplementary arm and upper body exercise programme to be compared with the standard rehabilitation programme group. Main outcome: The primary outcome was a Harris Hip Score. Secondary outcomes were: Hand grip strength and Medical Outcomes Study 36-Item Short-Form Health Survey. Outcomes were assessed preoperatively, two weeks after surgery and at 12 weeks follow-up. Results: In the intervention group, significant improvements were found: in functional ability - Harris Hip Score after two (mean difference = 4.7 points) and 12 (mean difference = 5.85 points) weeks; in muscle strength - handgrip for both hands (mean difference for dominant hand = 4.16 and for the other hand = 2.8) after 12 weeks; and in role-physical dimension SF-36 Health Survey (mean difference = 6.42 points) after 12 weeks. Conclusion: Results of this study indicate that arm and upper body exercises in addition to the standard rehabilitation programme improve outcomes 12 weeks after hip arthroplasty. © The Author(s) 2016.