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https://www.readbyqxmd.com/read/28088771/do-we-still-need-cross-sectional-studies-in-nephrology-yes-we-do
#1
Giovanni Tripepi, Graziella D'Arrigo, Kitty J Jager, Vianda S Stel, Friedo W Dekker, Carmine Zoccali
Cross-sectional studies represent the second line of evidence (after case reports) in the ladder of evidence aimed at defining disease aetiology. This study design is used to generate hypotheses about the determinants of a given disease but also to investigate the accuracy of diagnostic tests and to assess the burden of a given disease in a population. The intrinsic limitation of cross-sectional studies, when applied to generate aetiological hypotheses, is that both the exposure under investigation and the disease of interest are measured at the same point in time...
January 14, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28088751/chip-based-digital-surface-plasmon-resonance-sensing-platform-for-ultrasensitive-biomolecular-detection
#2
Ming-Yang Pan, Kuang-Li Lee, Likarn Wang, Pei-Kuen Wei
A chip-based ultrasensitive surface plasmon resonance (SPR) sensor in a checkerboard nanostructure on plastic substrates is presented for digital detection. The sensing elements on the checkerboard are composed of silver-capped nanoslit arrays, which were fabricated using the thermal-embossing nanoimprint method, to meet the demand for low-cost and rapid fabrication. Sharp Fano resonances in the optimized nanoslit arrays provide high-intensity sensitivities (20,000% per refractive index unit), with an element size of 12...
January 7, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28088721/modeling-biosolids-drying-through-a-laminated-hydrophobic-membrane
#3
Solmaz Marzooghi, Chunjian Shi, Steven K Dentel, Paul T Imhoff
The adaptation of the membrane distillation process as a low-cost and sustainable approach to biosolids drying and stabilization is investigated, which may have application in container-based sanitation systems proposed in low-income urban regions. Three-layer laminated, breathable, hydrophobic membranes enclose the biosolids, facilitating drying but preventing transport of contaminants. The membranes used in this process are non-wetting with pore spaces that only allow vapor transport. Water vapor can be expelled due to a moderate vapor pressure gradient...
December 29, 2016: Water Research
https://www.readbyqxmd.com/read/28088686/immune-history-and-influenza-virus-susceptibility
#4
REVIEW
Sarah Cobey, Scott E Hensley
Antibody responses to influenza viruses are critical for protection, but the ways in which repeated viral exposures shape antibody evolution and effectiveness over time remain controversial. Early observations demonstrated that viral exposure history has a profound effect on the specificity and magnitude of antibody responses to a new viral strain, a phenomenon called 'original antigenic sin.' Although 'sin' might suppress some aspects of the immune response, so far there is little indication that hosts with pre-existing immunity are more susceptible to viral infections compared to naïve hosts...
January 12, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28088617/assessing-physician-productivity-following-norwegian-hospital-reform-a-panel-and-data-envelopment-analysis
#5
Karl Arne Johannessen, Sverre A C Kittelsen, Terje P Hagen
BACKGROUND: Although health care reforms may improve efficiency at the macro level, less is known regarding their effects on the utilization of health care personnel. Following the 2002 Norwegian hospital reform, we studied the productivity of the physician workforce and the effect of personnel mix on this measure in all nineteen Norwegian hospitals from 2001 to 2013. METHODS: We used panel analysis and non-parametric data envelopment analysis (DEA) to study physician productivity defined as patient treatments per full-time equivalent (FTE) physician...
January 6, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28088597/phase-ii-randomized-trial-of-negative-pressure-wound-therapy-to-decrease-surgical-site-infection-in-patients-undergoing-laparotomy-for-gastrointestinal-pancreatic-and-peritoneal-surface-malignancies
#6
Perry Shen, Aaron Blackham, Stacey Lewis, Clancy Clark, Russell Howerton, Harveshp Mogal, Rebecca Dodson, Gregory B Russell, Edward A Levine
BACKGROUND: Surgical site infections (SSI) remain a major source of morbidity and cost after resection of intra-abdominal malignancies. Negative pressure wound therapy (NPWT) has been reported to significantly reduce SSI when applied to the closed laparotomy incision. This paper reports results of a randomized clinical trial examining the effect of NPWT on SSI rates in surgical oncology patients with increased risk for infectious complications. STUDY DESIGN: From 2012-2016, 265 patients underwent open resection of intra-abdominal neoplasms stratified into three groups: gastrointestinal (n=57), pancreas (n=73), and peritoneal surface malignancy (n=135)...
January 11, 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28088566/removal-of-salicylic-acid-as-an-emerging-contaminant-by-a-polar-nano-dendritic-adsorbent-from-aqueous-media
#7
M Arshadi, F Mousavinia, M K Abdolmaleki, M J Amiri, A Khalafi-Nezhad
A polar nano-dendritic adsorbent containing amine groups (SAPAMAA) was synthesized onto the nanoparticles of SiO2Al2O3 and its uptake of salicylic acid (SA) from the synthetic and real water was investigated. The synthesized nanomaterials were fully studied by nuclear magnetic resonance spectrum ((1)H NMR and (13)C NMR), Fourier transform infrared spectroscopy (FT-IR), zeta potential (ζ), inductively coupled plasma atomic emission spectroscopy (ICP-AES), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) and elemental analysis...
January 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088532/comparison-of-an-anaerobic-feed-and-split-anaerobic-aerobic-feed-on-granular-sludge-development-performance-and-ecology
#8
Benjamin J Thwaites, Petra Reeve, Nirmala Dinesh, Michael D Short, Ben van den Akker
The retrofitting of existing wastewater sequencing batch reactors (SBRs) to select for rapid-settling aerobic granular sludge (AGS) over floc-based conventional activated sludge (CAS), could be a viable option to decrease reactor cycle time and increase hydraulic capacity. Successful CAS-to-AGS conversion has previously been shown to be highly dependent on having a dedicated anaerobic feed, which presents additional engineering challenges when retrofitting SBRs. In this study we compared the performance of a split anaerobic-aerobic (An-Aer) feed with that of a traditional dedicated anaerobic feed regarding AGS formation and stability, nitrogen removal performance and microbial ecology...
December 29, 2016: Chemosphere
https://www.readbyqxmd.com/read/28088432/detection-of-upper-tract-urothelial-malignancies-by-computed-tomography-urography-in-patients-referred-for-hematuria-at-a-large-tertiary-referral-center
#9
Clayton W Commander, David C Johnson, Mathew C Raynor, Lauren M Burke, Kathryn E Hacker, Bryan Hoag, Julia R Fielding, Richard C Semelka, Ellie R Lee
OBJECTIVE: To evaluate the age-stratified prevalence of upper tract urothelial malignancies diagnosed on computed tomography urography in a large cohort of patients referred for initial evaluation of hematuria. MATERIALS AND METHODS: A total of 1123 consecutive adults without a history of urothelial cancer underwent initial computed tomography urography for gross hematuria (n = 652), microscopic hematuria (n = 457), or unspecified hematuria (n = 14) at a single institution from October 2006 to October 2012...
January 11, 2017: Urology
https://www.readbyqxmd.com/read/28088400/hospitalizations-for-respiratory-syncytial-virus-and-vaccine-preventable-infections-in-the-first-2-years-after-pediatric-liver-transplant
#10
Amy G Feldman, Shikha S Sundaram, Brenda L Beaty, Allison Kempe
OBJECTIVES: To examine in liver transplant recipients at centers participating in the Pediatric Health Information System dataset the number of hospitalizations for respiratory syncytial virus (RSV) and vaccine-preventable infections (VPIs) in the first 2 years after transplantation, morbidity and mortality associated with these hospitalizations, and costs associated with these hospitalizations. STUDY DESIGN: A retrospective cohort study of patients <18 years of age who underwent liver transplantation at a Pediatric Health Information System center between January 1, 2004, and December 31, 2012...
January 11, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28088294/suitability-of-small-diagnostic-peripheral-blood-samples-for-cell-therapy-studies
#11
Coralea Stephanou, Panayiota Papasavva, Myria Zachariou, Petros Patsali, Marilena Epitropou, Petros Ladas, Ruba Al-Abdulla, Soteroulla Christou, Michael N Antoniou, Carsten W Lederer, Marina Kleanthous
BACKGROUND AIMS: Primary hematopoietic stem and progenitor cells (HSPCs) are key components of cell-based therapies for blood disorders and are thus the authentic substrate for related research. We propose that ubiquitous small-volume diagnostic samples represent a readily available and as yet untapped resource of primary patient-derived cells for cell- and gene-therapy studies. METHODS: In the present study we compare isolation and storage methods for HSPCs from normal and thalassemic small-volume blood samples, considering genotype, density-gradient versus lysis-based cell isolation and cryostorage media with different serum contents...
February 2017: Cytotherapy
https://www.readbyqxmd.com/read/28088280/comparative-study-of-colloidal-gold-and-quantum-dots-as-labels-for-multiplex-screening-tests-for-multi-mycotoxin-detection
#12
Astrid Foubert, Natalia V Beloglazova, Sarah De Saeger
Quantum dots (QDs) and colloidal gold nanoparticles (CG) were evaluated as labels for multiplex lateral flow immunoassay (LFIA) for determination of mycotoxins deoxynivalenol (DON), zearalenone (ZEN) and T2/HT2-toxin (T2/HT2) in cereal matrices. Both developed assays were based on the same immunoreagents (except for the labels), therefore their analytical characteristics could be objectively compared. For both LFIAs antigens (DON-ovalbumin (OVA), ZEN-OVA and T2-OVA) and rabbit anti-mouse immunoglobulin were immobilized on a nitrocellulose membrane as three test lines and one control line, respectively...
February 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28088273/a-real-world-impact-of-cost-effectiveness-of-pegylated-interferon-ribavarin-regimens-on-treatment-na%C3%A3-ve-chronic-hepatitis-c-patients-in-taiwan
#13
Pei-Chien Tsai, Ta-Wei Liu, Meng-Hsuan Hsieh, Ming-Lun Yeh, Po-Cheng Liang, Yi-Hung Lin, Ching-I Huang, Chung-Feng Huang, Ming-Yen Hsieh, Nai-Jen Hou, Zu-Yau Lin, Shinn-Cherng Chen, Jee-Fu Huang, Chia-Yen Dai, Wan-Long Chuang, Ming-Lung Yu
Treatments with pegylated interferon/ribavirin (PEG-IFN/RBV) has been standard-of-care in patients with chronic hepatitis C virus (HCV) (CHC) infection and reimbursed in Taiwan. However, the actual cost-effectiveness remains unclear. We aimed to evaluate a real-world cost-effectiveness for CHC patients treated with PEG-IFN/RBV by using a clinical cohort with linkage to the National Health Insurance Research Database of Taiwan. The total and itemized medical-care expenses of outpatient visits of 117 treatment-naïve CHC patients with linkage to the two million sampling of the National Health Insurance Research Database were collected...
January 2017: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/28088246/budget-impact-analysis-of-vaccination-against-haemophilus-influenzae-type-b-as-a-part-of-a-pentavalent-vaccine-in-the-childhood-immunization-schedule-of-iran
#14
Fatemeh Teimouri, Abbas Kebriaeezadeh, Seyed Mohsen Zahraei, MohammadMahdi Gheiratian, Shekoufeh Nikfar
BACKGROUND: Health decision makers need to know the impact of the development of a new intervention on the public health and health care costs so that they can plan for economic and financial objectives. The aim of this study was to determine the budget impact of adding Haemophilus influenzae type b (Hib) as a part of a Pentavalent vaccine (Hib-HBV-DTP) to the national childhood immunization schedule of Iran. METHODS: An excel-based model was developed to determine the costs of including the Pentavalent vaccine in the national immunization program (NIP), comparing the present schedule with the previous one (including separate DTP and hepatitis B vaccines)...
January 14, 2017: Daru: Journal of Faculty of Pharmacy, Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28088238/lymph-node-pooling-a-feasible-and-efficient-method-of-lymph-node-molecular-staging-in-colorectal-carcinoma
#15
Natalia Rakislova, Carla Montironi, Iban Aldecoa, Eva Fernandez, Josep Antoni Bombi, Mireya Jimeno, Francesc Balaguer, Maria Pellise, Antoni Castells, Miriam Cuatrecasas
BACKGROUND: Pathologic lymph node staging is becoming a deficient method in the demanding molecular era. Nevertheless, the use of more sensitive molecular analysis for nodal staging is hampered by its high costs and extensive time requirements. Our aim is to take a step forward in colon cancer (CC) lymph node (LN) pathology diagnosis by proposing a feasible and efficient molecular method in routine practice using reverse transcription loop-mediated isothermal amplification (RT-LAMP). RESULTS: Molecular detection of tumor cytokeratin 19 (CK19) mRNA with RT-LAMP was performed in 3206 LNs from 188 CC patients using two methods: individual analysis of 1449 LNs from 102 patients (individual cohort), and pooled LN analysis of 1757 LNs from 86 patients (pooling cohort)...
January 14, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28088236/economic-burden-of-family-caregiving-for-elderly-population-in-southern-ghana-the-case-of-a-peri-urban-district
#16
Stephen Tettey Nortey, Genevieve Cecilia Aryeetey, Moses Aikins, Djesika Amendah, Justice Nonvignon
BACKGROUND: Health systems in low and lower-middle income countries, particularly in sub-Sahara Africa, often lack the specialized personnel and infrastructure to provide comprehensive care for elderly/ageing populations. Close-to-client community-based approaches are a low-cost way of providing basic care and social support for elderly populations in such resource-constrained settings and family caregivers play a crucial role in that regard. However, family caregiving duties are often unremunerated and their care-related economic burden is often overlooked though this knowledge is important in designing or scaling up effective interventions...
January 14, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28088232/utilization-of-mobile-phones-for-accessing-menstrual-regulation-services-among-low-income-women-in-bangladesh-a-qualitative-analysis
#17
Chelsea Jordan Messinger, Ilias Mahmud, Sushama Kanan, Yamin Tauseef Jahangir, Malabika Sarker, Sabina Faiz Rashid
BACKGROUND: As many as one-third of all pregnancies in Bangladesh are unplanned, with nearly one-half of these pregnancies ending in either menstrual regulation (MR) or illegal clandestine abortion. Although MR is provided free of charge, or at a nominal cost, through the public sector and various non-profits organizations, many women face barriers in accessing safe, affordable MR and post-MR care. Mobile health (mHealth) services present a promising platform for increasing access to MR among low-income women at risk for clandestine abortion...
January 14, 2017: Reproductive Health
https://www.readbyqxmd.com/read/28088225/using-low-cost-drones-to-map-malaria-vector-habitats
#18
Andy Hardy, Makame Makame, Dónall Cross, Silas Majambere, Mwinyi Msellem
BACKGROUND: There is a growing awareness that if we are to achieve the ambitious goal of malaria elimination, we must compliment indoor-based vector control interventions (such as bednets and indoor spraying) with outdoor-based interventions such as larval source management (LSM). The effectiveness of LSM is limited by our capacity to identify and map mosquito aquatic habitats. This study provides a proof of concept for the use of a low-cost (< $1000) drone (DJI Phantom) for mapping water bodies in seven sites across Zanzibar including natural water bodies, irrigated and non-irrigated rice paddies, peri-urban and urban locations...
January 14, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28088218/spinal-versus-general-anaesthesia-in-surgery-for-inguinodynia-spinasia-trial-study-protocol-for-a-randomised-controlled-trial
#19
Willem A R Zwaans, Léon H P M le Mair, Marc R M Scheltinga, Rudi M H Roumen
BACKGROUND: Chronic inguinodynia (groin pain) is a common complication following open inguinal hernia repair or a Pfannenstiel incision but may also be experienced after other types of (groin) surgery. If conservative treatments are to no avail, tailored remedial surgery, including a neurectomy and/or a (partial) meshectomy, may be considered. Retrospective studies in patients with chronic inguinodynia suggested that spinal anaesthesia is superior compared to general anaesthesia in terms of pain relief following remedial operations...
January 14, 2017: Trials
https://www.readbyqxmd.com/read/28088215/non-associative-versus-associative-learning-by-foraging-predatory-mites
#20
Peter Schausberger, Stefan Peneder
BACKGROUND: Learning processes can be broadly categorized into associative and non-associative. Associative learning occurs through the pairing of two previously unrelated stimuli, whereas non-associative learning occurs in response to a single stimulus. How these two principal processes compare in the same learning task and how they contribute to the overall behavioural changes brought about by experience is poorly understood. We tackled this issue by scrutinizing associative and non-associative learning of prey, Western flower thrips Frankliniella occidentalis, by the predatory mite, Neoseiulus californicus...
January 14, 2017: BMC Ecology
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