Search results for "Linear Model"
showing 10 items of 598 documents
Precision and Bias of Target-Controlled Prolonged Propofol Infusion for General Anesthesia and Sedation in Neurosurgical Patients
2018
The aim of this study was to determine the relationship, precision, and bias of a propofol target-controlled infusion (TCI) system during prolonged infusion in neurosurgical patients. We retrospectively included patients undergoing general anesthesia for elective neurosurgical removal of brain tumors and postoperative sedation in the intensive care unit over a period of 3 months. TCI of propofol (Diprifusor - Marsh model) and remifentanil were used for general anesthesia and sedation. We compared propofol blood concentration (Cmeas) measured by liquid chromatography-mass spectroscopy with predicted concentrations (Cpred) by the TCI system at 40 minutes (T0), 2 hours (T1), and 4 hours (T2) a…
Dimension reduction: additional benefit of an optimal filter for independent component analysis to extract event-related potentials.
2011
The present study addresses benefits of a linear optimal filter (OF) for independent component analysis (ICA) in extracting brain event-related potentials (ERPs). A filter such as the digital filter is usually considered as a denoising tool. Actually, in filtering ERP recordings by an OF, the ERP' topography should not be changed by the filter, and the output should also be able to be modeled by the linear transformation. Moreover, an OF designed for a specific ERP source or component may remove noise, as well as reduce the overlap of sources and even reject some non-targeted sources in the ERP recordings. The OF can thus accomplish both the denoising and dimension reduction (reducing the n…
Chocolate Consumption and Indicators of Adiposity in US Adults.
2020
International audience; Purpose: The purpose of this research is to investigate the association between consumption of chocolate and measures of adiposity in a large, representative sample of US adults. Methods: Cross-sectional data from 13,626 nondiabetic adults (≥20 years) participating in the National Health and Nutrition Examination Survey study were aggregated using 5 study cycles from 2005-2006 through 2013-2014. Chocolate consumption was determined based on 2 24-hour dietary recalls. Body mass index (BMI) and waist circumference were objectively measured. We used multivariable linear regression to test associations of 1) any chocolate consumption (yes/no), and 2) the total amount of …
Clinical success of intrauterine insemination cycles is affected by the sperm preparation time.
2013
Objective To determine the impact of the time interval from the end of sperm preparation (TSP) to intrauterine insemination (IUI) on the outcome. Design Prospective multicentre cohort study. Setting Seven French centers (assisted reproduction group in northeastern France, four academic centers, and three clinics). Patient(s) Eight hundred sixty-two IUI cycles (709 patients) managed by gonadotropins were studied. Intervention(s) Cycles were stimulated by either FSH or hMG, and hCG was administrated when the leading follicle diameter measured >15 mm. IUIs were performed ∼36 hours after ovulation triggering. Main Outcome Measure(s) Generalized linear mixed models for binary outcomes were used …
Long term hemodialysis aggravates lipolytic activity reduction and very low density, low density lipoproteins composition in chronic renal failure pa…
2009
Abstract Background Dyslipidemia, particularly hypertriglyceridemia is common in uremia, and represents an independent risk factor for atherosclerosis. Methods To investigate the effects of hemodialysis (HD) duration on very low density lipoprotein (VLDL) and low density lipoprotein (LDL) compositions and lipopolytic activities, 20 patients on 5 to 7 years hemodialysis were followed-up during 9 years. Blood samples were drawn at T0 (beginning of the study), T1 (3 years after initiating study), T2 (6 years after initiating study) and T3 (9 years after initiating study). T0 was taken as reference. Results Triacylglycerols (TG) values were correlated with HD duration (r = 0.70, P Conclusion De…
Evaluation of emotional skills in nursing using regression and QCA models: A transversal study
2019
Abstract Background Emotional skills are fundamental for quality service by nursing professionals, providing more personalized attention and a close relationship between the professional and patient. Objectives To compare linear relationship models (linear regressions) and models based on comparative qualitative analysis (QCA) in the analysis of the possible influence of socio-demographic variables (age and sex), working conditions (type of contract and seniority) and academic training (type of degree and specific training) on emotional abilities (emotional intelligence and empathy) in nursing. Design It is a transversal design in a single temporary moment. Participants The sample of this s…
Environmental exposure to dioxins and polychlorinated biphenyls reduce levels of gonadal hormones in newborns: Results from the Duisburg cohort study
2006
Abstract Background Endocrine dysfunction related to the hypothalamic–pituitary–thyroid (HPT) and/or the hypothalamic–pituitary–gonadal axis (HPG) is being discussed as underlying developmental adversity of polychlorinated dibenzo- p -dioxins and dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs). This study was done to evaluate effects related to the HPG axis. Methods A birth-cohort study was initiated in the year 2000. Healthy mother–infant pairs were recruited in the industrialized city of Duisburg, Germany. Dioxins, dioxin-like PCBs and six indicator PCBs were measured in maternal blood during pregnancy and in maternal milk. Testosterone and estradiol levels were measured in m…
Is There an Indication for Intraoperative MRI in Subtotal Resection of Glioblastoma? A Multicenter Retrospective Comparative Analysis.
2017
Objective Surgery in patients with highly eloquent glioblastoma (GB) remains challenging. The aim of this study was to evaluate influence of use of intraoperative magnetic resonance imaging (iMRI) on extent of resection (EOR), clinical outcome, and survival in patients with preoperatively intended subtotal resection of GB. Methods Retrospective assessment was performed in 3 neurosurgical centers (2008–2013). All patients with primary GB, unilocular growth, and adjuvant radiochemotherapy in whom subtotal resection was intended were included. Imaging data were pseudonymized and volumetrically assessed by a central reviewer. Clinical outcome was evaluated based on complications, new permanent …
Reliability of different models to assess heart rate recovery after submaximal bicycle exercise.
2011
Abstract Objectives : Different models to assess HR recovery have been developed but knowledge of their reliability is poor at different submaximal exercise intensities and recovery durations. Our aim was to determine the reliability of HR recovery after a test on a cycle ergometer. Design : Twenty-one healthy individuals performed a submaximal exercise at 65% and 80% HR max followed by passive recovery. The exercise was repeated (retest) within 2 weeks to assess reliability. Method : HR recovery was assessed by 8 models, based on monoexponential kinetics or absolute recovery (recovered HR at fix time points). Intraclass correlation coefficient (ICC) and standard error of measurement (SEM, …
Effect of body composition on the neuromuscular function of Finnish conscripts during an 8-week basic training period.
2008
The dropout rate in the Finnish military service has increased during the past two decades. At the same time, the physical fitness level of young Finnish males has decreased, possibly leading to overtraining in new conscripts. The purpose of the present study was to examine whether body composition would influence neuromuscular function during the 8-week basic training (BT) period. Eighteen healthy male subjects (19 +/- 1 years) were divided into three different groups according to their body fat %. Group 1 (10%), group 2 (10-13%) and group 3 (13%). The soleus H-reflex response was measured in the standing position. In the seated position (knee 160 degrees and hip 110 degrees), the V-wave r…