keyword
MENU ▼
Read by QxMD icon Read
search

Estimating equation

keyword
https://www.readbyqxmd.com/read/29782058/familial-aggregation-of-major-depressive-disorder-in-an-african-american-community
#1
Eleanor Murphy, James E Gangwisch, Janet T Matsunaga, Ruth Ottman
BACKGROUND: African Americans (AAs) with major depressive disorder (MDD) experience more impairment and poorer treatment outcomes relative to Whites, yet are underrepresented in family studies of MDD. This is the first study to investigate the familial aggregation of major depression among AAs. METHODS: Participants' reports of depression from clinical and family history (FH) interviews were used to examine depression rates among 435 first-degree relatives and half-siblings of 63 depressed cases and 222 relatives of 33 nondepressed controls...
May 21, 2018: Depression and Anxiety
https://www.readbyqxmd.com/read/29782019/tracking-infiltration-front-depth-using-time-lapse-multi-offset-gathers-collected-with-array-antenna-ground-penetrating-radar
#2
Hirotaka Saito, Seiichiro Kuroda, Toshiki Iwasaki, Haruyuki Fujimaki, Nobuhito Nagai, Jacopo Sala
A Ground Penetrating Radar (GPR) system based on a ground-coupled, densely populated antenna array was used to collect data during an infiltration experiment conducted at a test site near the Tottori Sand Dune, Japan. The antenna array used in this study consists of 10 transmitting antennas (Tx) and 11 receiving antennas (Rx). For this experiment, the system was configured to use all possible Tx-Rx pairings, resulting in a Multi-Offset Gather (MOG) consisting of 110 Tx-Rx combinations. The array was left stationary at a position directly above the infiltration area and data were collected every 1...
May 1, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29781839/modeling-the-skeleton-weight-of-an-adult-caucasian-man
#3
Maia Avtandilashvili, Sergei Y Tolmachev
The reference value for the skeleton weight of an adult male (10.5 kg) recommended by the International Commission on Radiological Protection in Publication 70 is based on weights of dissected skeletons from 44 individuals, including two U.S. Transuranium and Uranium Registries whole-body donors. The International Commission on Radiological Protection analysis of anatomical data from 31 individuals with known values of body height demonstrated significant correlation between skeleton weight and body height...
May 17, 2018: Health Physics
https://www.readbyqxmd.com/read/29781710/a-computationally-more-efficient-and-more-accurate-stepwise-approach-for-correcting-for-sampling-error-and-measurement-error
#4
Steffen Zitzmann
Over the last decade or two, multilevel structural equation modeling (ML-SEM) has become a prominent modeling approach in the social sciences because it allows researchers to correct for sampling and measurement errors and thus to estimate the effects of Level 2 (L2) constructs without bias. Because the latent variable modeling software Mplus uses maximum likelihood (ML) by default, many researchers in the social sciences have applied ML to obtain estimates of L2 regression coefficients. However, one drawback of ML is that covariance matrices of the predictor variables at L2 tend to be degenerate, and thus, estimates of L2 regression coefficients tend to be rather inaccurate when sample sizes are small...
May 21, 2018: Multivariate Behavioral Research
https://www.readbyqxmd.com/read/29781637/a-comparison-of-several-approaches-for-controlling-measurement-error-in-small-samples
#5
Victoria Savalei
It is well known that methods that fail to account for measurement error in observed variables, such as regression and path analysis (PA), can result in poor estimates and incorrect inference. On the other hand, methods that fully account for measurement error, such as structural equation modeling with latent variables and multiple indicators, can produce highly variable estimates in small samples. This article advocates a family of intermediate models for small samples (N < 200), referred to as single indicator (SI) models...
May 21, 2018: Psychological Methods
https://www.readbyqxmd.com/read/29780767/effectiveness-of-a-multicomponent-school-based-intervention-to-reduce-bullying-among-adolescents-in-chandigarh-north-india-a-quasi-experimental-study-protocol
#6
Monica Rana, Madhu Gupta, Prahbhjot Malhi, Sandeep Grover, Manmeet Kaur
Background: Bullying perpetration and victimization is associated with significant academic, psychosocial and health related problems among adolescents. There is a need to develop effective interventions to prevent bullying among adolescents, especially in low and middle income countries. This paper presents the study protocol to develop, and evaluate the effect of multi-component school based prevention program for bullying in India. Design: Quasi-experimental study...
February 5, 2018: Journal of Public Health Research
https://www.readbyqxmd.com/read/29779857/factors-affecting-the-incidence-of-contrast-induced-nephropathy-in-patients-undergoing-computed-tomography
#7
M Heras Benito, M Garrido Blázquez, Y Gómez Sanz, M Bernardez Mardomingo, J Ruiz Cacho, F J Rodríguez Recio, M J Fernández-Reyes Luis
OBJECTIVE: To analyze the incidence of contrast-induced nephropathy in a cohort of patients undergoing computed tomography (CT) with intravenous iodinated contrast material. To evaluate the efficacy of N-acetylcysteine in preventing contrast-induced nephropathy. PATIENTS AND METHODS: This prospective observational study was carried out in the months comprising March 2016 through July 2016. We selected the first five patients scheduled to undergo CT examination each day who agreed to participate and signed the informed consent form...
May 17, 2018: Radiología
https://www.readbyqxmd.com/read/29777820/accuracy-and-precision-of-quantitative-dce-mri-parameters-how-should-one-estimate-contrast-concentration
#8
Nicole Wake, Hersh Chandarana, Henry Rusinek, Koji Fujimoto, Linda Moy, Daniel K Sodickson, Sungheon Gene Kim
INTRODUCTION: Pharmacokinetic parameters derived from dynamic contrast-enhanced MRI (DCE-MRI) data are sensitive to acquisition and post-processing techniques, which makes it difficult to compare results obtained using different methods. In particular, one of the most important factors affecting estimation of model parameters is how to convert MRI signal intensities to contrast agent concentration. The purpose of our study was to quantitatively compare a linear signal-to-concentration conversion (LC) as an approximation and a non-linear conversion (NLC) based on the MRI signal equation, in terms of the accuracy and precision of the pharmacokinetic parameters in T1 -weighted DCE-MRI...
May 16, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29777535/the-relationship-between-costs-and-quality-in-veterans-health-administration-community-living-centers-an-analysis-using-longitudinal-data
#9
James F Burgess, Michael Shwartz, Kelly Stolzmann, Jennifer L Sullivan
OBJECTIVE: To examine the relationship between cost and quality in Veterans Health Administration (VA) nursing homes (called Community Living Centers, CLCs) using longitudinal data. DATA SOURCES/STUDY SETTING: One hundred and thirty CLCs over 13 quarters (from FY2009 to FY2012) were studied. Costs, resident days, and resident severity (RUGs score) were obtained from the VA Managerial Cost Accounting System. Clinical quality measures were obtained from the Minimum Data Set, and resident-centered care (RCC) was measured using the Artifacts of Culture Change Tool...
May 18, 2018: Health Services Research
https://www.readbyqxmd.com/read/29777227/in-utero-exposure-to-gestational-diabetes-and-adiposity-does-breastfeeding-make-a-difference
#10
L L Hui, A M Li, E A S Nelson, G M Leung, S L Lee, C M Schooling
BACKGROUND/OBJECTIVES: Short-term breastfeeding from mothers with gestational diabetes (GDM) may programme metabolism and increase offspring diabetes risk. We examined the association of in utero GDM exposure with adiposity from infancy to adolescence, and whether any association was modified by breastfeeding during early infancy. METHODS: In the prospective Chinese birth cohort "Children of 1997" (n = 7342, 88% follow-up rate), generalised estimate equations with multiple imputation were used to assess associations of in utero GDM exposure with age- and sex-specific body mass index (BMI) z-score during infancy (3 and 9 months), childhood (2- < 8 years) and adolescence (8-16 years), adjusted for sex, parity, maternal age, birth place, preeclampisa, smoking, and family socio-economic position...
May 17, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29776921/determining-the-pneumococcal-conjugate-vaccine-coverage-required-for-indirect-protection-against-vaccine-type-pneumococcal-carriage-in-low-and-middle-income-countries-a-protocol-for-a-prospective-observational-study
#11
Jocelyn Chan, Cattram D Nguyen, Jana Y R Lai, Eileen M Dunne, Ross Andrews, Christopher C Blyth, Siddhartha Datta, Kim Fox, Rebecca Ford, Jason Hinds, Sophie La Vincente, Deborah Lehmann, Ruth Lim, Tuya Mungun, Paul N Newton, Rattanaphone Phetsouvanh, Willam S Pomat, Anonh Xeuatvongsa, Claire von Mollendorf, David A B Dance, Catherine Satzke, Kim Muholland, Fiona M Russell
INTRODUCTION: Pneumococcal conjugate vaccines (PCVs) prevent disease through both direct protection of vaccinated individuals and indirect protection of unvaccinated individuals by reducing nasopharyngeal (NP) carriage and transmission of vaccine-type (VT) pneumococci. While the indirect effects of PCV vaccination are well described, the PCV coverage required to achieve the indirect effects is unknown. We will investigate the relationship between PCV coverage and VT carriage among undervaccinated children using hospital-based NP pneumococcal carriage surveillance at three sites in Asia and the Pacific...
May 18, 2018: BMJ Open
https://www.readbyqxmd.com/read/29776694/predictive-equations-versus-measured-energy-expenditure-by-indirect-calorimetry-a-retrospective-validation
#12
Oren Zusman, Ilya Kagan, Itai Bendavid, Miriam Theilla, Jonathan Cohen, Pierre Singer
BACKGROUND & AIMS: Measuring resting energy expenditure (REE) via indirect calorimetry (IC) in intensive care unit (ICU) patient is the gold standard recommended by guidelines. However technical difficulties hinder its use and predictive equations are largely used instead. We sought to validate commonly used equations using a large cohort of patients. METHODS: Patients hospitalized from 2003 to 2015 in a 16-bed ICU at a university-affiliated, tertiary care hospital who had IC measurement to assess caloric targets were included...
May 8, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29776359/evaluation-of-malaria-rapid-diagnostic-test-rdt-use-by-community-health-workers-a-longitudinal-study-in-western-kenya
#13
Matthew R Boyce, Diana Menya, Elizabeth L Turner, Jeremiah Laktabai, Wendy Prudhomme-O'Meara
BACKGROUND: Malaria rapid diagnostic tests (RDTs) are a simple, point-of-care technology that can improve the diagnosis and subsequent treatment of malaria. They are an increasingly common diagnostic tool, but concerns remain about their use by community health workers (CHWs). These concerns regard the long-term trends relating to infection prevention measures, the interpretation of test results and adherence to treatment protocols. This study assessed whether CHWs maintained their competency at conducting RDTs over a 12-month timeframe, and if this competency varied with specific CHW characteristics...
May 18, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29776120/amplitude-dependent-topological-edge-states-in-nonlinear-phononic-lattices
#14
Raj Kumar Pal, Javier Vila, Michael Leamy, Massimo Ruzzene
This work investigates the effect of nonlinearities on topologically protected edge states in one- and two-dimensional phononic lattices. We first show that localized modes arise at the interface between two spring-mass chains that are inverted copies of each other. Explicit expressions derived for the frequencies of the localized modes guide the study of the effect of cubic nonlinearities on the resonant characteristics of the interface, which are shown to be described by a Duffing-like equation. Nonlinearities produce amplitude-dependent frequency shifts, which in the case of a softening nonlinearity cause the localized mode to migrate to the bulk spectrum...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29775394/degradation-of-ticarcillin-by-subcritial-water-oxidation-method-application-of-response-surface-methodology-and-artificial-neural-network-modeling
#15
Erdal Yabalak
This study was performed to investigate the mineralization of ticarcillin in the artificially prepared aqueous solution presenting ticarcillin contaminated waters, which constitute a serious problem for human health. 81.99% of total organic carbon removal, 79.65% of chemical oxygen demand removal, and 94.35% of ticarcillin removal were achieved by using eco-friendly, time-saving, powerful and easy-applying, subcritical water oxidation method in the presence of a safe-to-use oxidizing agent, hydrogen peroxide...
May 18, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775220/cystatin-c-is-a-more-reliable-biomarker-for-determining-egfr-to-support-drug-development-studies
#16
REVIEW
Sumit Kar, Sabina Paglialunga, Rafiqul Islam
Glomerular filtration rate (GFR) is routinely used as a surrogate endpoint for the development of investigational drugs in clinical trials. GFR and staging of chronic kidney disease are typically assessed by measuring the concentration of endogenous serum biomarkers such as albumin and creatinine. However, creatinine is subject to high biological variability, and levels of creatinine do not rise until nearly 50% of kidney function is damaged, leading to inaccurate chronic kidney disease staging and false negatives...
May 18, 2018: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29775076/walking-with-controlled-breathing-improves-exercise-tolerance-anxiety-and-quality-of-life-in-heart-failure-patients-a-randomized-controlled-trial
#17
Hsiu-Chin Teng, Mei-Ling Yeh, Mei-Hua Wang
BACKGROUND: Patients with heart failure experience not only impaired physical condition, but also their physical activity, moods, and quality of life may be diminished. AIMS: The purpose of this study was to investigate the effects of 12-week walking with breathing program on physical activity tolerance considering time-dependent physiological factors and time-independent interoceptive awareness, as well as psychosocial factors. METHODS: This randomized controlled trial recruited 90 heart failure patients and randomly assigned them...
May 1, 2018: European Journal of Cardiovascular Nursing
https://www.readbyqxmd.com/read/29774462/combining-gfr-estimates-from-cystatin-c-and-creatinine-what-is-the-optimal-mix
#18
Emil den Bakker, Reinoud Gemke, Joanna A E van Wijk, Isabelle Hubeek, Birgit Stoffel-Wagner, Arend Bökenkamp
BACKGROUND: Combining estimated glomerular filtration rate (eGFR) equations based on creatinine and cystatin C has been shown to improve the accuracy of GFR estimation. This study aims to optimize this strategy for height-independent GFR estimation in children. METHODS: Retrospective study of 408 inulin clearance tests with simultaneous International Federation of Clinical Chemistry-calibrated measurements of creatinine, cystatin C, and urea in children (mean age 12...
May 17, 2018: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29773969/cost-effectiveness-of-umeclidinium-compared-with-tiotropium-and-glycopyrronium-as-monotherapy-for-chronic-obstructive-pulmonary-disease-a-uk-perspective
#19
Dhvani Shah, Maurice Driessen, Nancy Risebrough, Timothy Baker, Ian Naya, Andrew Briggs, Afisi S Ismaila
Background: Cost-effectiveness of once-daily umeclidinium bromide (UMEC) was compared with once-daily tiotropium (TIO) and once-daily glycopyrronium (GLY) in patients with chronic obstructive pulmonary disease (COPD) from a UK National Health Service (NHS) perspective. Methods: A linked-equation model was implemented to estimate COPD progression, associated healthcare costs, exacerbations rates, life years (LY) and quality-adjusted LY (QALYs). Statistical risk equations for endpoints and resource use were derived from the ECLIPSE and TORCH studies, respectively...
2018: Cost Effectiveness and Resource Allocation: C/E
https://www.readbyqxmd.com/read/29773930/gradient-estimates-and-liouville-type-theorems-for-a-weighted-nonlinear-elliptic-equation
#20
Bingqing Ma, Yongli Dong
We consider gradient estimates for positive solutions to the following nonlinear elliptic equation on a smooth metric measure space [Formula: see text]: [Formula: see text] where a , b are two real constants. When the ∞-Bakry-Émery Ricci curvature is bounded from below, we obtain a global gradient estimate which is not dependent on [Formula: see text]. In particular, we find that any bounded positive solution of the above equation must be constant under some suitable assumptions.
2018: Journal of Inequalities and Applications
keyword
keyword
55431
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"