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(Generalized estimating equation) or GEE

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https://www.readbyqxmd.com/read/28215045/a-generalized-partially-linear-mean-covariance-regression-model-for-longitudinal-proportional-data-with-applications-to-the-analysis-of-quality-of-life-data-from-cancer-clinical-trials
#1
Xueying Zheng, Guoyou Qin, Dongsheng Tu
Motivated by the analysis of quality of life data from a clinical trial on early breast cancer, we propose in this paper a generalized partially linear mean-covariance regression model for longitudinal proportional data, which are bounded in a closed interval. Cholesky decomposition of the covariance matrix for within-subject responses and generalized estimation equations are used to estimate unknown parameters and the nonlinear function in the model. Simulation studies are performed to evaluate the performance of the proposed estimation procedures...
February 19, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28213001/predictive-factors-for-egfr-tyrosine-kinase-inhibitor-retreatment-in-patients-with-egfr-mutated-non-small-cell-lung-cancer-a-multicenter-retrospective-sequence-study
#2
Gee-Chen Chang, Chien-Hua Tseng, Kuo-Hsuan Hsu, Chong-Jen Yu, Cheng-Ta Yang, Kun-Chieh Chen, Tsung-Ying Yang, Jeng-Sen Tseng, Chien-Ying Liu, Wei-Yu Liao, Te-Chun Hsia, Chih-Yen Tu, Meng-Chih Lin, Ying-Huang Tsai, Meng-Jer Hsieh, Wen-Shuo Wu, Yuh-Min Chen
BACKGROUND: Acquired resistance occurs in most non-small cell lung cancer (NSCLC) patients with epidermal growth factor receptor (EGFR) mutations experiencing a response to EGFR-tyrosine kinase inhibitor (TKI) initially. We investigated EGFR-TKI retreatment in patients who had previously received EGFR-TKI followed by chemotherapy. MATERIALS AND METHODS: This was a retrospective multicenter study. Patients with locally advanced or metastatic adenocarcinoma or TTF-1 (+) NSCLC, positive EGFR sensitive mutation, and EGFR-TKI reuse after initial EGFR-TKI followed by chemotherapy were enrolled...
February 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/28212586/effects-of-resistance-band-exercise-on-vascular-activity-and-fitness-in-older-adults
#3
Mark F Smith, Mistrelle Ellmore, Geoff Middleton, Paul M Murgatroyd, Thomas I Gee
This study investigated the effects of a low to moderately intense resistance-band exercise intervention on cutaneous microvascular function in an older population. 18 sedentary healthy participants (age: 58±5) were assessed for their upper and lower-limb endothelial cutaneous vascular conductance using laser Doppler fluximetry with endothelial-dependent (80 μl acetylcholine chloride), and -independent vasodilation (80 μl sodium nitroprusside). In addition, participants underwent a range of functional assessments (cardiopulmonary fitness, strength, flexibility), and completed a perceived quality of life questionnaire...
February 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28211910/link-between-plasminogen-activator-inhibitor-1-and-cardiovascular-risk-in-chronic-hepatitis-c-after-viral-clearance
#4
Ming-Ling Chang, Yu-Sheng Lin, Li-Heng Pao, Hsin-Chih Huang, Cheng-Tang Chiu
The pathophysiological implications of plasminogen activator inhibitor-1 (PAI-1) in HCV infection remain obscure. This prospective study evaluated 669 HCV patients, of whom 536 had completed a course of anti-HCV therapy and had pre-, peri- and post-therapy measurements of various profiles, including PAI-1 levels. Multivariate analysis demonstrated, before anti-HCV-therapy, platelet count and PAI-1-rs1799889 genotype were associated with PAI-1 levels. Among patients with a sustained virological response (SVR, n = 445), platelet count was associated with PAI-1 level at 24 weeks post-therapy...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28210800/preservation-of-the-endometrial-enhancement-after-magnetic-resonance-imaging-guided-high-intensity-focused-ultrasound-ablation-of-submucosal-uterine-fibroids
#5
Young-Sun Kim, Tae-Joong Kim, Hyo Keun Lim, Hyunchul Rhim, Sin-Ho Jung, Joong Hyun Ahn, Jeong-Won Lee, Byoung-Gie Kim
OBJECTIVE: To evaluate the integrity of endometrial enhancement after magnetic resonance imaging-guided high-intensity focused ultrasound (MR-HIFU) ablation of submucosal uterine fibroids based on contrast-enhanced MRI findings, and to identify the risk factors for endometrial impairment. METHODS: In total, 117 submucosal fibroids (diameter: 5.9 ± 3.0 cm) in 101 women (age: 43.6 ± 4.4 years) treated with MR-HIFU ablation were retrospectively analysed...
February 16, 2017: European Radiology
https://www.readbyqxmd.com/read/28210027/klapp-method-effect-on-idiopathic-scoliosis-in-adolescents-blind-randomized-controlled-clinical-trial
#6
Diego De Sousa Dantas, Sanderson José Costa De Assis, Marina Pegoraro Baroni, Johnnatas Mikael Lopes, Enio Walker Azevedo Cacho, Roberta De Oliveira Cacho, Silvana Alves Pereira
[Purpose] To estimate the effect of Klapp method on idiopathic scoliosis in school students. [Subjects and Methods] A single-blind randomized clinical trial with 22 students randomly divided into intervention group (n=12) and inactive control group (n=10). Exercise protocol consisted of Klapp method, 20 sessions, three times a week for intervention group, and inactivity for control group. Dorsal muscle strength was measured by dynamometer; body asymmetries and gibbosity angles were measured by biophotogrammetry...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28209728/evaluation-of-cell-therapy-on-exercise-performance-and-limb-perfusion-in-peripheral-artery-disease-the-cctrn-patients-with-intermittent-claudication-injected-with-aldh-bright-cells-pace-trial
#7
Emerson C Perin, Michael P Murphy, Keith L March, Roberto Bolli, John Loughran, Phillip C Yang, Nicholas J Leeper, Ronald L Dalman, Jason Q Alexander, Timothy D Henry, Jay H Traverse, Carl J Pepine, R David Anderson, Scott Berceli, James T Willerson, Raja Muthupillai, Amir A Gahremanpour, Ganesh Raveendran, Omaida C Velazquez, Joshua M Hare, Ivonne H Schulman, Vijaykumar S Kasi, William R Hiatt, Bharath Ambale-Venkatesh, João A Lima, Doris A Taylor, Micheline M Resende, Adrian P Gee, April G Durett, Jeannette Bloom, Sara Richman, Patricia G'Sell, Shari Williams, Fouzia Khan, Elsie G Ross, Michelle R Santoso, JoAnne Goldman, Dana Leach, Eileen Handberg, Benjamin Y C Cheong, Nichole A Piece, Darcy DiFede, Barb Bruhn-Ding, Emily Caldwell, Judy Bettencourt, Dejian Lai, Linda B Piller, Lara M Simpson, Michelle Cohen, Shelly L Sayre, Rachel W Vojvodic, Lem Moyé, Ray F Ebert, Robert D Simari, Alan T Hirsch
Background -Atherosclerotic peripheral artery disease (PAD) affects 8-12% of Americans over 65 and is associated with a major decline in functional status, increased myocardial infarction and stroke rates, and increased risk of ischemic amputation. Current treatment strategies for claudication have limitations. PACE is an NHLBI-sponsored, randomized, double-blind, placebo-controlled phase 2, exploratory clinical trial designed to assess safety and efficacy of autologous bone marrow-derived aldehyde dehydrogenase bright (ALDHbr) cells in PAD patients and to explore associated claudication physiologic mechanisms...
February 16, 2017: Circulation
https://www.readbyqxmd.com/read/28204843/bread-wheat-milling-behavior-effects-of-genetic-and-environmental-factors-and-modeling-using-grain-mechanical-resistance-traits
#8
François-Xavier Oury, P Lasme, C Michelet, A Dubat, O Gardet, E Heumez, B Rolland, M Rousset, J Abecassis, C Bar L'Helgouac'h, V Lullien-Pellerin
Genetic (Pinb-D1 alleles) and environment (through vitreousness) have important effects on bread wheat milling behavior. SKCS optimal values corresponding to soft vitreous or hard mealy grains were defined to obtain the highest total flour yield. Near-isogenic lines of bread wheat that differ in hardness, due to distinct puroindoline-b alleles (the wild type, Pinb-D1a, or the mutated forms, Pinb-D1b or Pinb-D1d), were grown in different environments and under two nitrogen fertilization levels, to study genetic and environmental effects on milling behavior...
February 15, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28202744/a-cross-sectional-analysis-of-radiographic-ankle-osteoarthritis-frequency-and-associated-factors-the-johnston-county-osteoarthritis-project
#9
Shahmeer Lateef, Yvonne M Golightly, Jordan B Renner, Joanne M Jordan, Amanda E Nelson
OBJECTIVE: Because there are no epidemiologic data regarding the frequency of ankle osteoarthritis (OA) in a general population, we sought to analyze this disabling condition in a large, well-characterized, community-based cohort of older individuals. METHODS: Cross-sectional data, including ankle radiographs, were from the most recent data collection (2013-2015) of the Johnston County OA Project. Radiographic ankle OA (rAOA) was defined as a Kellgren-Lawrence arthritis grading scale of ≥ 2 on weight-bearing lateral and mortise radiographs...
February 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28202428/patient-use-of-electronic-prescription-refill-and-secure-messaging-and-its-association-with-undetectable-hiv-viral-load-a-retrospective-cohort-study
#10
D Keith McInnes, Stephanie L Shimada, Amanda M Midboe, Kim M Nazi, Shibei Zhao, Justina Wu, Casey M Garvey, Thomas K Houston
BACKGROUND: Electronic personal health records (PHRs) can support patient self-management of chronic conditions. Managing human immunodeficiency virus (HIV) viral load, through taking antiretroviral therapy (ART) is crucial to long term survival of persons with HIV. Many persons with HIV have difficulty adhering to their ART over long periods of time. PHRs contribute to chronic disease self-care and may help persons with HIV remain adherent to ART. Proportionally veterans with HIV are among the most active users of the US Department of Veterans Affairs (VA) PHR, called My HealtheVet...
February 15, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28199381/impact-of-the-anti-aquaporin-4-autoantibody-on-inner-retinal-structure-function-and-structure-function-associations-in-japanese-patients-with-optic-neuritis
#11
Yoshiko Matsumoto, Sotaro Mori, Kaori Ueda, Takuji Kurimoto, Akiyasu Kanamori, Yuko Yamada, Ichiro Nakashima, Makoto Nakamura
PURPOSE: An autoantibody against aquaporin-4 (AQP4 Ab) is highly specific for neuromyelitis optica spectrum disorder and plays a pathogenic role in this disease. The purpose of this study was to investigate the impact of AQP4 Ab on inner retinal structure, function, and the structure-function relationships in eyes with optic neuritis. METHODS: Thirty five eyes from 25 cases who had received visual function tests and RTVue optical coherence tomography (OCT) measurement at least six months after the latest episode of optic neuritis were enrolled...
2017: PloS One
https://www.readbyqxmd.com/read/28198577/serum-carotenoid-and-tocopherol-concentrations-and-risk-of-asthma-in-childhood-a-nested-case-control-study
#12
Niina Hӓmӓlӓinen, Bright I Nwaru, Iris Erlund, Hanna-Mari Takkinen, Suvi Ahonen, Jorma Toppari, Jorma Ilonen, Riitta Veijola, Mikael Knip, Minna Kaila, Suvi M Virtanen
BACKGROUND: The antioxidant hypothesis regarding the risk of asthma in childhood has resulted in inconsistent findings. Some data indicate that the role of antioxidants in childhood asthma risk may have a critical time window of effect, but only a well-designed longitudinal cohort study can clarify this hypothesis. OBJECTIVE: To study the longitudinal associations between serum carotenoid and tocopherol concentrations during the first 4 years of life and asthma risk by the age of 5 years...
February 15, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28197864/status-of-iron-metabolism-10-years-after-roux-en-y-gastric-bypass
#13
Daniela Vicinansa Monaco-Ferreira, Vânia Aparecida Leandro-Merhi
BACKGROUND: The aim of this study is to investigate changes in iron metabolism and verify whether biochemical parameters are related to the use of oral iron supplement 10 years after Roux-en-Y gastric bypass. METHODS: This longitudinal retrospective study included 151 patients submitted to Roux-en-Y gastric bypass. The collected data included use of an oral iron supplement, hemoglobin, hematocrit, serum iron, and ferritin. The chi-squared or Fisher's exact test was used to analyze the association between use of iron supplement and nutritional deficiency...
February 14, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28196430/first-in-human-trial-of-a-type-i-positive-allosteric-modulator-of-alpha7-nicotinic-acetylcholine-receptors-pharmacokinetics-safety-and-evidence-for-neurocognitive-effect-of-avl-3288
#14
Kelvin W Gee, Ann Olincy, Richard Kanner, Lynn Johnson, Derk Hogenkamp, Josette Harris, Minhtam Tran, Stephen A Edmonds, William Sauer, Ryan Yoshimura, Timothy Johnstone, Robert Freedman
Type I positive allosteric modulators (PAMs) of the alpha7-nicotinic receptor enhance its cholinergic activation while preserving the spatiotemporal features of synaptic transmission and the receptor's characteristic rapid desensitization kinetics. Alpha7-nicotinic receptor agonists have shown promise for improving cognition in schizophrenia, but longer-term trials have been disappointing. Therefore, the type I PAM AVL-3288 was evaluated for safety and preliminary evidence of neurocognitive effect in healthy human subjects...
February 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28196327/food-parenting-practices-and-their-association-with-child-nutrition-risk-status-comparing-mothers-and-fathers
#15
Jessica Charlotte Watterworth, Joy Miranda Mackay, Andrea C Buchholz, Gerarda Darlington, Janis A Randall Simpson, David W L Ma, Jess Haines
In Canada, little is known about how food parenting practices are associated with young children's dietary intakes and no studies have examined food parenting practices of Canadian fathers. This study aimed to examine associations between food parenting practices and preschool-age children's nutrition risk. We conducted a cross-sectional analysis of 31 two-parent families; 31 mothers, 31 fathers and 40 preschool-age children. Parents completed an adapted version of the Comprehensive Feeding Practices Questionnaire...
February 14, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28195003/average-duration-of-treatment-with-antipsychotics-among-concession-card-holders-in-australia
#16
Svein R Kjosavik, Marianne H Gillam, Elisabeth E Roughead
OBJECTIVE: To analyse average treatment duration with antipsychotics reimbursed for concession card holders under the Pharmaceutical Benefits Scheme; the proportion of initial prescribing by general practitioners, psychiatrists and other physician; and the trend in drug choice in Australia. METHOD: Based on a representative 10% sample of patients receiving Pharmaceutical Benefits Scheme prescriptions since 2005, antipsychotics redeemed by concession card holders in the period from 2010 to 2013 were analysed...
February 1, 2017: Australian and New Zealand Journal of Psychiatry
https://www.readbyqxmd.com/read/28194729/design-and-implementation-of-decision-support-for-tobacco-dependence-treatment-in-an-inpatient-electronic-medical-record-a-randomized-trial
#17
Steven L Bernstein, June Rosner, Michelle DeWitt, Jeanette Tetrault, Allen L Hsiao, James Dziura, Scott Sussman, Patrick O'Connor, Benjamin Toll
: Tobacco dependence treatment for hospitalized smokers results in long-term cessation if treatment continues at least 30 days post-discharge. Health information technology may facilitate ongoing tobacco dependence treatment after hospital discharge. To describe the use and impact of a new decision support tool and order set for inpatient physicians, addressing tobacco dependence treatment for hospitalized smokers, embedded in an electronic health record (EHR). In a cluster-randomized trial, 254 physicians were randomized (1:1) to either receive or not receive the decision support tool and order set, which were embedded in the Epic (Madison, WI) EHR used at 2 hospitals in a single city...
February 13, 2017: Translational Behavioral Medicine
https://www.readbyqxmd.com/read/28194588/dual-incarceration-and-condom-use-in-committed-relationships
#18
Allison K Groves, WeiHai Zhan, Ana Maria Del Río-González, Alana Rosenberg, Kim M Blankenship
Incarceration fractures relationship ties and has been associated with unprotected sex. Relationships where both individuals have a history of incarceration (dual incarceration) may face even greater disruption and involve more unprotected sex than relationships where only one individual has been incarcerated. We sought to determine whether dual incarceration is associated with condom use, and whether this association varies by relationship type. Data come from 499 sexual partnerships reported by 210 individuals with a history of incarceration...
February 13, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28193307/heritability-and-gwas-studies-for-monocyte-lymphocyte-ratio
#19
Bochao D Lin, Gonneke Willemsen, Iryna O Fedko, Rick Jansen, Brenda Penninx, E de Geus, C Kluft, JoukeJan Hottenga, Dorret I Boomsma
The monocyte-lymphocyte ratio (MLR) is a useful biomarker for disease development, but little is known about the extent to which genetic and environmental factors influence MLR variation. Here, we study the genetic architecture of MLR and determine the influence of demographic and lifestyle factors on MLR in data from a Dutch non-patient twin-family population. Data were obtained in 9,501 individuals from the Netherlands Twin Register. We used regression analyses to determine the effects of age, sex, smoking, and body mass index (BMI) on MLR and its subcomponents...
February 14, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28192605/stagewise-generalized-estimating-equations-with-grouped-variables
#20
Gregory Vaughan, Robert Aseltine, Kun Chen, Jun Yan
Forward stagewise estimation is a revived slow-brewing approach for model building that is particularly attractive in dealing with complex data structures for both its computational efficiency and its intrinsic connections with penalized estimation. Under the framework of generalized estimating equations, we study general stagewise estimation approaches that can handle clustered data and non-Gaussian/non-linear models in the presence of prior variable grouping structure. As the grouping structure is often not ideal in that even the important groups may contain irrelevant variables, the key is to simultaneously conduct group selection and within-group variable selection, that is, bi-level selection...
February 13, 2017: Biometrics
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