27 research outputs found

    An Archetype Mid-Rise Building for Novel Complete Cold-Formed Steel Buildings

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    This paper introduces an archetype mid-rise cold-formed steel (CFS) building that aids in assessing the limits of current structural solutions, particularly lateral force resisting systems, and also in the development of new CFS technologies. A unified archetype building provides a platform for comparing the performance of new lateral force resisting systems to existing ones. The study herein provides quantitative evaluation of the design limitations of a typical “complete” cold-formed steel building (i.e. only cold-formed steel based elements are used for all gravity and lateral force resisting systems) at different heights (4 through 20 stories) located in a high seismic zone. The primary focus is the seismic force resisting system, which is limited to shear wall systems detailed in AISI specifications. The archetype buildings are designed using ASCE7-10 for all required loads and load combinations; and the CFS framing systems are designed utilizing AISI specifications, particularly AISI-400-15. Limitations in the application of current specifications for designing mid-rise cold-formed steel buildings are provided, and the potential for further studies discussed

    The Relationship Between Serum Levels of Interleukins 6, 8, 10 and Clinical Outcome in Patients With Severe Traumatic Brain Injury

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    Background: Clinical outcome in patients with severe traumatic brain injury (TBI) depends on both primary and secondary brain injuries. Neuroinflammation is an important secondary mechanism, which occurs by releasing interleukins (ILs). Increased levels of ILs may affect clinical outcome following TBI. Objectives: This study aimed to determine the relationship between the serum levels of interleukins 6, 8 and 10 and clinical outcome in patients with severe TBI 6 months after injury. Patients and Methods: In a descriptive-analytical study, 44 patients with GCS ≤ 8 (Glasgow coma scale) and age ≥ 14 years were included. Their blood samples were collected at first 6 hours after injury. Clinical outcome was determined based on GOS (Glasgow Outcome Scale) at 6 months after head injury. Serum levels of interleukins 6, 8 and 10 were measured using the ELISA method. Spearman's rho, independent T-Test, and Mann-Whitney Test were used for data analysis. Results: Comparing the serum levels of interleukins in two groups with favorable and unfavorable clinical outcomes showed that the mean serum levels of interleukins 6 and 8 in group with favorable outcome was 85.2 ± 51.6 and 52.2 ± 31.9, respectively lower than those of group with unfavorable outcome with 162.3 ± 141.1 and 173.6 ± 257.3 (P < 0.03) and (P < 0.01). Conclusions: Increased serum levels of interleukins 6 and 8 as a predictive marker might be associated with unfavorable clinical outcome in patients with severe TBI

    Healthy dietary indices and risk of depressive outcomes : a systematic review and meta-analysis of observational studies

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    With depression being the psychiatric disorder incurring the largest societal costs in developed countries, there is a need to gather evidence on the role of nutrition in depression, to help develop recommendations and guide future psychiatric health care. The aim of this systematic review was to synthesize the link between diet quality, measured using a range of predefined indices, and depressive outcomes. Medline, Embase and PsychInfo were searched up to 31st May 2018 for studies that examined adherence to a healthy diet in relation to depressive symptoms or clinical depression. Where possible, estimates were pooled using random effect meta-analysis with stratification by observational study design and dietary score. A total of 20 longitudinal and 21 cross-sectional studies were included. These studies utilized an array of dietary measures, including: different measures of adherence to the Mediterranean diet, the Healthy Eating Index (HEI) and Alternative HEI (AHEI), the Dietary Approaches to Stop Hypertension, and the Dietary Inflammatory Index. The most compelling evidence was found for the Mediterranean diet and incident depression, with a combined relative risk estimate of highest vs. lowest adherence category from four longitudinal studies of 0.67 (95% CI 0.55-0.82). A lower Dietary Inflammatory Index was also associated with lower depression incidence in four longitudinal studies (relative risk 0.76; 95% CI: 0.63-0.92). There were fewer longitudinal studies using other indices, but they and cross-sectional evidence also suggest an inverse association between healthy diet and depression (e.g., relative risk 0.65; 95% CI 0.50-0.84 for HEI/AHEI). To conclude, adhering to a healthy diet, in particular a traditional Mediterranean diet, or avoiding a pro-inflammatory diet appears to confer some protection against depression in observational studies. This provides a reasonable evidence base to assess the role of dietary interventions to prevent depression.Peer reviewe

    Total, dietary, and supplemental calcium intake and mortality from all-causes, cardiovascular disease, and cancer: A meta-analysis of observational studies

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    Aims: This systematic review and meta-analysis of observational studies was conducted to summarize the evidence on the association between calcium intake and mortality. Methods and results: PubMed, Institute for Scientific Information (ISI) (Web of Science), SCOPUS, SciRUS, Google Scholar, and Excerpta Medica dataBASE (EMBASE) were searched to identify related articles published through May 2014. We found 22 articles that assessed the association between total, dietary, and supplementary intake with mortality from all-causes, cardiovascular disease (CVD), and cancer. Findings from this meta-analysis revealed no significant association between total and dietary calcium intake and mortality from all-causes, CVD, and cancer. Subgroup analysis by the duration of follow-up revealed a significant positive association between total calcium intake and CVD mortality for cohort studies with a mean follow-up duration of >10 years (relative risk (RR): 1.35; 95 confidence interval (CI): 1.09-1.68). A significant inverse association was seen between dietary calcium intake and all-cause (RR: 0.84; 95 CI: 0.70-1.00) and CVD mortality (RR: 0.88; 95 CI: 0.78-0.99) for studies with a mean follow-up duration of �10 years. Although supplemental calcium intake was not associated with CVD (RR: 0.95; 95 CI: 0.82-1.10) and cancer mortality (RR: 1.22; 95 CI: 0.81-1.84), it was inversely associated with the risk of all-cause mortality (RR: 0.91; 95 CI: 0.88-0.94). Conclusions: We found a significant relationship between the total calcium intake and an increased risk of CVD mortality for studies with a long follow-up time and a significant protective association between dietary calcium intake and all-cause and CVD mortality for studies with a mean follow-up of �10 years. Supplemental calcium intake was associated with a decreased risk of all-cause mortality. © 2015 Elsevier B.V

    The effects of caffeine intake on weight loss: a systematic review and dos-response meta-analysis of randomized controlled trials

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    This systematic review and meta-analysis of randomized controlled trials (RCTs) was performed to summarize the effect of caffeine intake on weight loss. We searched the following databases until November 2017: MEDLINE, EMBASE, Web of Science, and Cochrane Central Register of Controlled Trials. The relevant data were extracted and assessed for quality of the studies according to the Cochrane risk of bias tool. We estimated an intake-status regression coefficient (Beta) for each primary study and estimated the overall pooled Beta and SE using random effects meta-analysis on a double-log scale. Heterogeneity between studies was assessed by the Cochran Q statistic and I-squared tests (I2). Thirteen RCTs with 606 participants were included in the meta-analyses. The overall pooled Beta for the effect of caffeine intake was 0.29 (95CI: 0.19, 0.40; Q = 124.5, I2 = 91.2) for weigh, 0.23 (95CI: 0.09, 0.36; Q = 71.0, I2 = 93.0) for BMI, and 0.36 (95 CI: 0.24, 0.48; Q = 167.36, I2 = 94.0) for fat mass. For every doubling in caffeine intake, the mean reduction in weight, BMI, and fat mass increased 2 Beta-fold (20.29 = 1.22, 20.23 = 1.17, and 20.36 = 1.28), which corresponding to 22, 17, and 28 percent, respectively. Overall, the current meta-analysis demonstrated that caffeine intake might promote weight, BMI and body fat reduction. © 2018, © 2018 Taylor & Francis Group, LLC

    The Effects of Synbiotic Supplementation on Antioxidant Capacity and Arm Volumes in Survivors of Breast Cancer-Related Lymphedema

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    Background and Aims: Synbiotics found to be beneficial in breast cancer survivors (BCSs) through its antioxidant properties. The aim of this study was to assess the effects of synbiotic supplementation on edema volume and some oxidative markers among obese and overweight patients with BCRL. Method: This randomized double-blind, placebo-controlled trial was conducted on 88 overweight and obese BCSs aged 18�65 years. All the subjects were given a specified low-calorie diet (LCD) and were randomly assigned into two groups to intake 109 CFU/day synbiotic supplement (n = 44) or placebo (n = 44) for 10 wk. Edema volume and serum total antioxidant capacity (TAC), malondialdehyde (MDA), glutathione peroxidase (GPx), and superoxide dismutase (SOD) concentration were measured at baseline and after the 10-wk intervention. Results: Ten-wk supplementation with synbiotics leads to a significant reduction in serum MDA levels (P = 0.001) and an increase in serum SOD concentration (P = 0.007) compared to placebo. No significant changes were observed in serum GPx, TAC, and edema volume between groups. Conclusion: Our findings reveal that 10-wk synbiotic supplementation along with a LCD program-reduced serum MDA levels and elevate the activity of SOD in overweight and obese patients with BCRL. However, its effect on serum GPx, TAC, and edema volume was not significant. © 2019, © 2019 Iran University of Medical Sciences

    Fast vs. ultraslow thrombolytic infusion regimens in patients with obstructive mechanical prosthetic valve thrombosis: a pilot randomized clinical trial

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    AIMS: Thrombolysis is an alternative to surgery for mechanical prosthetic valve thrombosis (MPVT). Randomized clinical trials have yet to test the safety and efficacy of a proposed ultraslow thrombolytic infusion regimen. METHODS AND RESULTS: This single-centre, open-label, pilot randomized clinical trial randomized adult patients with acute obstructive MPVT to an ultraslow thrombolytic regimen [25&nbsp;mg of recombinant tissue-type plasminogen activator (rtPA) infused in 25&nbsp;h] and a fast thrombolytic regimen (50&nbsp;mg of rtPA infused in 6&nbsp;h). If thrombolysis failed, a repeated dose of 25&nbsp;mg of rtPA for 6&nbsp;h was administered in both groups up to a cumulative dose of 150&nbsp;mg or the occurrence of a complication. The primary outcome was a complete MPVT resolution (&gt;75% fall in the obstructive gradient by transthoracic echocardiography, &lt;10° limitation in opening and closing valve motion angles by fluoroscopy, and symptom improvement). The key safety outcome was a Bleeding Academic Research Consortium type III or V major bleeding. Overall, 120 patients, including 63 (52.5%) women, at a mean age of 36.3&nbsp;±&nbsp;15.3&nbsp;years, were randomized. Complete thrombolysis success was achieved in 51 patients (85.0%) in the ultraslow-regimen group and 47 patients (78.3%) in the fast-regimen group [odds ratio 1.58; 95% confidence interval (CI) 0.25-1.63; P = 0.34]. One case of transient ischaemic attack and three cases of intracranial haemorrhage (absolute risk difference -6.6%; 95%CI -12% -0.3%; P = 0.07) were observed only in the fast-regimen group. CONCLUSION: The ultraslow thrombolytic regimen conferred a high thrombosis resolution rate without major complications. Such findings should be replicated in more adequately powered trials
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