127 research outputs found

    Fakt├Âr ├ç─▒karma Y├Ântemlerinin Paralel Analiz Sonu├žlar─▒na Etkisi

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    DergiPark: 747075tredA├ž─▒mlay─▒c─▒ fakt├Âr analizinden en ├Ânemli kararlardan biri fakt├Âr say─▒s─▒n─▒ belirlemektir. Bunun i├žin bir├žok y├Ântem geli┼čtirilmi┼č olsa da paralel analiz, hala en ├žok ├Ânerilen ve kullan─▒lan y├Ântemler aras─▒nda yer almaktad─▒r. S─▒kl─▒kla kullan─▒lmas─▒ bir├žok modifikasyonun yap─▒lmas─▒na ve analizle ilgili ara┼čt─▒rmalar─▒n yo─čunla┼čmas─▒na neden olmu┼čtur. Bu ara┼čt─▒rmada a├ž─▒mlay─▒c─▒ fakt├Âr analizinde kullan─▒lan fakt├Âr ├ž─▒karma y├Ântemlerinin paralel analiz sonu├žlar─▒na etkisinin incelenmesi ama├žlanm─▒┼č ve Monte Carlo sim├╝lasyon ├žal─▒┼čmas─▒ ger├žekle┼čtirilmi┼čtir. ─░ki kategorili veri setleriyle ger├žekle┼čtirilen sim├╝lasyon ├žal─▒┼čmas─▒nda ortalama fakt├Âr y├╝k├╝, madde say─▒s─▒, ├Âl├žme modeli, ├Ârneklem b├╝y├╝kl├╝─č├╝ ve kullan─▒lan korelasyon matrisi ko┼čullar─▒ manip├╝le edilmi┼čtir. Paralel analizde uygulanan en k├╝├ž├╝k kal─▒nt─▒, temel bile┼čenler, temel eksenler, en ├žok olabilirlik, a─č─▒rl─▒kland─▒r─▒lmam─▒┼č en k├╝├ž├╝k kareler, en k├╝├ž├╝k ki-kare ve optimal paralel analizde uygulanan en k├╝├ž├╝k rank fakt├Âr ├ž─▒karma y├Ântemleri kar┼č─▒la┼čt─▒r─▒lm─▒┼čt─▒r. Ara┼čt─▒rma sonucunda tetrakorik korelasyon matrisiyle ger├žekle┼čtirilen optimal paralel analiz y├Ânteminin uyguland─▒─č─▒ en k├╝├ž├╝k rank y├Ânteminin en iyi sonucu verdi─či g├Âzlenmi┼čtir. Bununla birlikte ortalama fakt├Âr y├╝k├╝ .70 olan ko┼čullarda Pearson korelasyon matrisiyle ger├žekle┼čtirilen analizlerde t├╝m y├Ântemler yeterli performans g├Âsterirken tetrakorik korelasyon matrisinin kullan─▒lmas─▒yla paralel analiz uygulanan temel bile┼čenler ve optimal paralel analiz uygulanan en k├╝├ž├╝k rank y├Ântemleri hari├ž di─čer y├Ântemlerin a┼č─▒r─▒ fakt├Âr ├ž─▒kard─▒─č─▒ s├Âylenebilir. Ara┼čt─▒rma bulgular─▒na g├Âre tetrakorik (polikorik) korelasyon matrisiyle en k├╝├ž├╝k rank y├Ântemiyle optimal paralel analizin kullan─▒lmas─▒ ├Ânerilmektedi

    Shear Bond Strength Evaluation of Different Composites Used As Lingual Retainer Adhesives

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    The aim of this study was to determine the shear bond strength (SBS) levels and fracture modes of different composites used as lingual retainer adhesives. Sixty human mandibular incisors were used, that mounted in acrylic resin leaving the buccal surface of the crowns parallel to the base of the moulds. Randomly three groups were constructed, each containing 20 teeth. Transbond-LR (3M-Uni-tek), Transbond-XT (3M-Unitek) and Venus Flow (Heraeus Kulzer) were tested. Materials were applied to the teeth surface by packing the material into the cylindrical plastic matrices with a 2.34 mm internal diameter and a 3 mm height (Ultradent) to simulate the lingual retainer bonding. For SBS testing, the specimens were mounted in a universal testing machine, and an apparatus (Ultradent) attached to a compression load cell was applied to each of the specimen until the failure occurred. The SBS data were analyzed using analysis of variance and Tukey tests, and chi-square test was used to analyze the fracture modes. The statistical tests indicated that Transbond-LR shows statistically significant higher SBS (24.7┬▒9.25 MPa) then Transbond-XT (12.01┬▒4.98 MPa) and Venus Flow (14.07┬▒5.25 MPa) (P<0.001) whereas the difference between Transbond-XT and Venus Flow was not significant. In general, a greater percentage of the fractures were adhesive at the tooth-composite interface (60%% for Transbond-LR and Venus Flow and 90┬░% for Transbond-XT) and no statistically significant difference was found between the groups. According to the results of this study, Transbond LR was found to be most appropriate material for the tested specification

    Evaluation of Fit between Tooth and Band Surfaces when Different Orthodontic Cements are Used

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    The aim of this in vitro study was to compare three orthodontic band cements for gaps remained between tooth and band surfaces, at the cervical margin, which possibly caused after banding procedure. Sixty freshly extracted human mandibular third molars were randomly divided into 3 equal groups. Micro-etched molar bands were cemented to the teeth using each of the orthodontic band cements (Ketac Cem®, 3M Multi-Cure® and Transbond Plus®). The teeth were placed in preformed boxes (2.5X2.5X2.5 cm); crowns were on the bottom and perpendicular to the ground. Samples were capped with black colored plaster on a vibration machine. After hardening of the plasters, samples were removed from the boxes and were trimmed in the bucco-lingual dimension for evaluation. The mean of four parallel sections examined under a stere-omicroscope was noted as the score of that sample, for buccal and lingual sides, separately. Statistically analyses were performed by using analysis of variance and paired-samples t-test. When buccal and lingual gap formations were compared, Transbond Plus® and Ketac Cem® groups were found to have larger gaps in the lingual side than buccal at p<0.05 and p<0.01 level, respectively. Thus, buccal and lingual gaps of three cements were compared separately, and no statistically significant difference was determined among three investigated cement types at buccal and lingual sides. However no differences were found among different types of band cements, it is clear that large gaps were observed under molar bands at cervical margin; where it is not easily possible to clean. Further studies should be conducted to determine a favorable strategy to eliminate these gaps and maintain a gap-free adaptation and cementation between band and tooth structure

    Dilated Cardiomyopathy in a 2 Month-Old Infant: A Severe Form of Hypocalcemia With Vitamin D Deficient Rickets

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    Dilated cardiomyopathy, which mostly has an idiopathic etiology or is caused by genetic inheritance or infection, can cause irreversible congestive heart failure. Hypocalcemia is a rare etiology of reversible dilated cardiomyopathy. Here we report the case of a two-month-old girl with congestive heart failure who was diagnosed as having dilated cardiomyopathy secondary to hypocalcemia. After calcium and vitamin D replacement therapy, the patient showed a rapid reduction in hypocalcemic tetany and a rapid recovery of left ventricular function. The cause of the hypocalcemia was vitamin D deficient rickets. She was exclusively breast-fed as an infant, and her mother had a vitamin D deficiency and was diagnosed with osteomalacia

    Effects of high-intensity interval training program on pituartry function in basketball players: a randomized controlled trial

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    The aim of the study was to determine how the short high-interval training program affects cortisol levels in basketball players. A total of 27 male basketball players volunteered for the study and were randomly assigned to one of two groups: Control Group (CG) (n = 13, mean age; 20,56 ± 1,45 years, mean height; 184,53 ± 6,65 cm) and Experimental Group (EG) (n = 14, mean age; 20,71 ± 2,12 years, mean height; 86,51 ± 8,21 cm). The experimental group received a 7-week interval training program. Blood samples were taken at the beginning and end of the study. Cortisol, Adrenocorticotropic Hormone, Triiodothyronine, Tetraiodothyronine, Parathyroid Hormone, Thyroid Stimulating Hormone, Insulin, and Glucose levels were measured of the EG and CG. To test the differences between groups and compare the effects of pre and post-intervention, a two-way ANOVA for repeated measures was used. Consequently, the post-test levels of TSH, PTH, and ACTH in the exercise group showed a significant difference when compared to the pre-test values (p = 0.000). Moreover, the post-test levels of Glucose, Cholesterol, Triglyceride, HDL, and Mg in the exercise group showed statistical significance when compared to the pre-test values (p = 0.000). Significant differences were seen in the post-test PTH and ACTH levels of the control group when compared to the pre-test values (p = 0.000). Furthermore, the exercise group showed significant differences in post-test values for HDL and Cholesterol compared to the pre-test (p = 0.000). In addition, when comparing the post-test values and pre-test values of both the exercise group and the control group, it was found that all parameters, with the exception of Ca, exhibited substantial differences in favor of the exercise group. It may be claimed that the implementation of interval training has favorable outcomes on pituitary function parameters. Additionally, the regulation of energy consumption during exercise is favourably influenced, along with the reduction of physiological stress resulting from prolonged exercise

    Self-reported antibiotic stewardship and infection control measures from 57 intensive care units: An international ID-IRI survey

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    We explored the self-reported antibiotic stewardship (AS), and infection prevention and control (IPC) activities in intensive care units (ICUs) of different income settings. A cross-sectional study was conducted using an online questionnaire to collect data about IPC and AS measures in participating ICUs. The study participants were Infectious Diseases-International Research Initiative (IDI-IR) members, committed as per their institutional agreement form. We analyzed responses from 57 ICUs in 24 countries (Lower-middle income (LMI), n = 13; Upper-middle income (UMI), n = 33; High-income (HI), n = 11). This represented (similar to 5%) of centers represented in the ID-IRI. Surveillance programs were implemented in (76.9%-90.9%) of ICUs with fewer contact precaution measures in LMI ones (p = 0.02); (LMI:69.2%, UMI:97%, HI:100%). Participation in regional antimicrobial resistance programs was more significantly applied in HI (p = 0.02) (LMI:38.4%,UMI:81.8%,HI:72.2%). AS programs are implemented in 77.2% of institutions with AS champions in 66.7%. Infectious diseases physicians and microbiologists are members of many AS teams (59%&amp;50%) respectively. Unqualified healthcare professionals(42.1%), and deficient incentives(28.1%) are the main barriers to implementing AS. We underscore the existing differences in IPC and AS programs' implementation, team composition, and faced barriers. Continuous collaboration and sharing best practices on APM is needed. The role of regional and international organizations should be encouraged. Global support for capacity building of healthcare practitioners is warranted. (C) 2022 Published by Elsevier Ltd on behalf of King Saud Bin Abdulaziz University for Health Sciences

    Effects of hospital facilities on patient outcomes after cancer surgery: an international, prospective, observational study

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    Background Early death after cancer surgery is higher in low-income and middle-income countries (LMICs) compared with in high-income countries, yet the impact of facility characteristics on early postoperative outcomes is unknown. The aim of this study was to examine the association between hospital infrastructure, resource availability, and processes on early outcomes after cancer surgery worldwide.Methods A multimethods analysis was performed as part of the GlobalSurg 3 study-a multicentre, international, prospective cohort study of patients who had surgery for breast, colorectal, or gastric cancer. The primary outcomes were 30-day mortality and 30-day major complication rates. Potentially beneficial hospital facilities were identified by variable selection to select those associated with 30-day mortality. Adjusted outcomes were determined using generalised estimating equations to account for patient characteristics and country-income group, with population stratification by hospital.Findings Between April 1, 2018, and April 23, 2019, facility-level data were collected for 9685 patients across 238 hospitals in 66 countries (91 hospitals in 20 high-income countries; 57 hospitals in 19 upper-middle-income countries; and 90 hospitals in 27 low-income to lower-middle-income countries). The availability of five hospital facilities was inversely associated with mortality: ultrasound, CT scanner, critical care unit, opioid analgesia, and oncologist. After adjustment for case-mix and country income group, hospitals with three or fewer of these facilities (62 hospitals, 1294 patients) had higher mortality compared with those with four or five (adjusted odds ratio [OR] 3.85 [95% CI 2.58-5.75]; p&lt;0.0001), with excess mortality predominantly explained by a limited capacity to rescue following the development of major complications (63.0% vs 82.7%; OR 0.35 [0.23-0.53]; p&lt;0.0001). Across LMICs, improvements in hospital facilities would prevent one to three deaths for every 100 patients undergoing surgery for cancer.Interpretation Hospitals with higher levels of infrastructure and resources have better outcomes after cancer surgery, independent of country income. Without urgent strengthening of hospital infrastructure and resources, the reductions in cancer-associated mortality associated with improved access will not be realised

    Heterogeneous contributions of change in population distribution of body mass index to change in obesity and underweight NCD Risk Factor Collaboration (NCD-RisC)