keyword
MENU ▼
Read by QxMD icon Read
search

propensity score

keyword
https://www.readbyqxmd.com/read/29151274/effect-of-hmg-coa-reductase-inhibitors-on-the-development-of-chronic-lung-allograft-dysfunction
#1
Amanda Szczepanik, Amanda Hulbert, Hui-Jie Lee, Clark Benedetti, Laurie Snyder, Jennifer Byrns
Lung transplant recipients (LR) have a reduced median five-year survival of approximately 55% primarily due to chronic lung allograft dysfunction (CLAD). Statins have anti-inflammatory and immunomodulatory effects that may facilitate CLAD prevention. This study sought to evaluate statin effect on CLAD development. Adult bilateral LR from January 2004-October 2013 were included. Statin group included recipients with early statin use and continued for minimum 6 months. Propensity score matching was performed for age, gender and native lung disease to select matched non-statin group...
November 19, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/29151046/the-association-between-gastro-oesophageal-reflux-disease-and-subsequent-rheumatoid-arthritis-occurrence-a-nested-case-control-study-from-taiwan
#2
Herng-Ching Lin, Sudha Xirasagar, Cha-Ze Lee, Chung-Chien Huang, Chao-Hung Chen
OBJECTIVE: Gastro-oesophageal reflux disease (GORD) is a common comorbidity among patients with rheumatoid arthritis (RA). While GORD has been attributed to the antirheumatic medications, no studies of human cohorts have investigated a link between GORD and RA. This study investigates whether GORD is associated with a subsequent RA diagnosis over a 5-year follow-up using a population-based dataset. SETTING: Taiwan PARTICIPANTS: We used data from the Taiwan Longitudinal Health Insurance Database...
November 17, 2017: BMJ Open
https://www.readbyqxmd.com/read/29150873/survival-in-patients-with-parkinson-s-disease-after-deep-brain-stimulation-or-medical-management
#3
Frances M Weaver, Kevin T Stroupe, Bridget Smith, Beverly Gonzalez, Zhiping Huo, Lishan Cao, Dolores Ippolito, Kenneth A Follett
OBJECTIVE: Deep brain stimulation has been shown to have a significant long-term beneficial effect on motor function. However, whether it affects survival is not clear. In this study, we compared survival rates for Parkinson's disease (PD) patients who underwent deep brain stimulation (DBS) with those who were medically managed. METHODS: A retrospective analysis of Veterans Affairs and Medicare administrative data of veterans with PD who received DBS and were propensity score matched to a cohort of veterans with PD who did not receive DBS between 2007-2013...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29150818/review-of-practical-propensity-score-methods-using-r-leite-2007
#4
Haiyan Bai, Wei Pan
No abstract text is available yet for this article.
November 17, 2017: Psychometrika
https://www.readbyqxmd.com/read/29150387/the-effect-of-social-fathers-on-the-cognitive-skills-of-out-of-wedlock-children-in-the-u-s
#5
Kwok Ho Chan, Ka Wai Terence Fung
There are two competing views regarding the presence of social fathers on childrens' cognitive ability: (1) either the social father provides more financial resources which benefit the children or (2) the mother with new partners may shift the focus away from the children. Previous research focused on older children or adolescents and ignored the self-selection problem. We use data from the Fragile Families and Child Wellbeing Study (FFCWS), and a sample of younger children. Using propensity score matching method (nonparametric methods), we find that children with social fathers scored around three points less in a cognitive ability test than children living only with biological mothers (assuming that self-selection is based on observables)...
October 18, 2017: Economics and Human Biology
https://www.readbyqxmd.com/read/29149632/brain-structural-differences-between-73-and-92-year-olds-matched-for-childhood-intelligence-social-background-and-intracranial-volume
#6
Stuart J Ritchie, David Alexander Dickie, Simon R Cox, Maria Del C Valdés Hernández, Ruth Sibbett, Alison Pattie, Devasuda Anblagan, Paul Redmond, Natalie A Royle, Janie Corley, Susana Muñoz Maniega, Adele M Taylor, Sherif Karama, Tom Booth, Alan J Gow, John M Starr, Mark E Bastin, Joanna M Wardlaw, Ian J Deary
Fully characterizing age differences in the brain is a key task for combating aging-related cognitive decline. Using propensity score matching on 2 independent, narrow-age cohorts, we used data on childhood cognitive ability, socioeconomic background, and intracranial volume to match participants at mean age of 92 years (n = 42) to very similar participants at mean age of 73 years (n = 126). Examining a variety of global and regional structural neuroimaging variables, there were large differences in gray and white matter volumes, cortical surface area, cortical thickness, and white matter hyperintensity volume and spatial extent...
October 16, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29148740/effect-of-an-imposed-contact-on-secondary-structure-in-the-denatured-state-of-yeast-iso-1-cytochome-c
#7
Travis A Danielson, Jessica M Stine, Tanveer A Dar, Klara Briknarova, Bruce E Bowler
There is considerable evidence that long-range interactions stabilize residual protein structure under denaturing conditions. However, evaluation of the effect of a specific contact on structure in the denatured state has been difficult. Iso-1-cytochrome c variants with a Lys54-->His mutation form a particularly stable His-heme loop in the denatured state, suggestive of loop-induced residual structure. We have used multidimensional NMR methods to assign (1)H and (15)N backbone amide and (13)C backbone and side chain chemical shifts in the denatured state of iso-1-cytochrome c carrying the Lys54-->His mutation in 3 and 6 M guanidine hydrochloride and at both pH 6...
November 17, 2017: Biochemistry
https://www.readbyqxmd.com/read/29148246/impact-of-hospital-volume-on-long-term-neurological-outcome-in-patients-undergoing-carotid-artery-stenting-a-nationwide-propensity-score-matched-study-doi-10-1002-ccd-26989
#8
Chi-Sheng Hung, Chih-Fan Yeh, Mao-Shin Lin, Ying-Hsien Chen, Ching-Chang Huang, Hung-Yuan Li, Hsien-Li Kao
No abstract text is available yet for this article.
November 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29148205/inhaled-corticosteroids-and-the-risks-of-low-energy-fractures-in-patients-with-chronic-airway-diseases-a-propensity-score-matched-study
#9
Chun-Hao Tsai, Lin-Yu Laio, Cheng-Li Lin, Wei-Sheng Chung
BACKGROUND AND AIMS: Inhaled corticosteroids (ICSs) are crucial anti-inflammatory medications for chronic airway diseases. Studies investigating the relationship between ICSs and fractures in Asian populations are scant. We investigated whether ICSs increased the risk of low-energy fractures in patients with chronic airway diseases. METHODS: We used the Longitudinal Health Insurance Database to select patients aged 20 years and older with chronic airway diseases (asthma and COPD) between 2000 and 2011 as the base cohort...
November 17, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29147814/health-care-service-utilization-of-documented-and-undocumented-hired-farmworkers-in-the-u-s
#10
Tianyuan Luo, Cesar L Escalante
This article analyzes issues related to U.S. hired farmworkers' utilization of health care services and their specific choices among health care provider and health bill payment method options. Using data from the National Agricultural Workers Surveys for the years 2000-2012, this article employs propensity score matching and probit estimation techniques to examine the health care utilization of hired farmworkers. This study's results indicate that undocumented hired farmworkers are 10.7 and 3% less likely to use U...
November 16, 2017: European Journal of Health Economics: HEPAC: Health Economics in Prevention and Care
https://www.readbyqxmd.com/read/29147788/dissociated-pulmonary-vein-activity-after-cryoballoon-ablation-and-radiofrequency-ablation-for-atrial-fibrillation-a-propensity-score-matched-analysis
#11
Kenichi Tokutake, Michifumi Tokuda, Seiichiro Matsuo, Ryota Isogai, Kenichi Yokoyama, Mika Kato, Ryohsuke Narui, Shinichi Tanigawa, Seigo Yamashita, Satoru Miyanaga, Michihiro Yoshimura, Teiichi Yamane
Cryoballoons (CBs) have proven to be effective for achieving pulmonary vein isolation (PVI) in patients with atrial fibrillation (AF). Dissociated PV activity (DPVA) after successful radiofrequency PVI is sometimes observed inside the PV and has been found to prove the achievement of electrical disconnection from the left atrium. However, little is known about the incidence or characteristics of DPVA after CB-PVI. The aim of this study was to compare the incidence and characteristics of DPVA in patients undergoing CB and radiofrequency (RF) ablation for AF...
November 17, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29146829/is-bridging-therapy-still-required-in-stroke-due-to-carotid-artery-terminus-occlusions
#12
Romain Bourcier, Pierre-Louis Alexandre, François Eugène, Béatrice Delasalle-Guyomarch, Benoit Guillon, Basile Kerleroux, Suzana Saleme, Gaultier Marnat, Samy Boucebci, Mahmood Mirza, Jean-Christophe Ferré, Chrysanthi Papagiannaki, Hubert Desal
INTRODUCTION: Studies comparing endovascular stroke treatment using mechanical thrombectomy (MT) with or without prior IV tissue plasminogen activator (tPa) have included only 30% of internal carotid artery terminus occlusions (ICA-O), a known predictor of recanalization failure with IV tPa. OBJECTIVE: To carry out a retrospective multicenter analysis of prospectively collected data of consecutive patients to investigate the impact of intravenous thrombolysis on ICA-O by comparing patients treated with MT alone or bridging therapy (BT)...
November 16, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29146662/comparative-effectiveness-of-injectable-penicillin-versus-a-combination-of-penicillin-and-gentamicin-in-children-with-pneumonia-characterised-by-indrawing-in-kenya-a-retrospective-observational-study
#13
Lucas Malla, Rafael Perera-Salazar, Emily McFadden, Mike English
OBJECTIVES: Kenyan guidelines for antibiotic treatment of pneumonia recommended treatment of pneumonia characterised by indrawing with injectable penicillin alone in inpatient settings until early 2016. At this point, they were revised becoming consistent with WHO guidance after results of a Kenyan trial provided further evidence of equivalence of oral amoxicillin and injectable penicillin. This change also made possible use of oral amoxicillin for outpatient treatment in this patient group...
November 15, 2017: BMJ Open
https://www.readbyqxmd.com/read/29146626/clinical-outcomes-in-1731-patients-undergoing-mitral-valve-surgery-for-rheumatic-valve-disease
#14
Wan Kee Kim, Ho Jin Kim, Joon Bum Kim, Sung-Ho Jung, Suk Jung Choo, Cheol Hyun Chung, Jae Won Lee
OBJECTIVE: Unlike degenerative mitral valve (MV) disease, the advantages of valve repair procedure over replacement have been debated in rheumatic MV disease. This study aims to evaluate the impact of procedural types on long-term outcomes through analyses on a large data set from an endemic area of rheumatic disease. METHODS: We evaluated 1731 consecutive patients (52.3±12.5 years; 1190 women) undergoing MV surgery for rheumatic MV disease between 1997 and 2015...
November 16, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29146523/factors-that-contribute-to-differences-in-survival-of-black-vs-white-patients-with-colorectal-cancer
#15
Helmneh M Sineshaw, Kimmie Ng, W Dana Flanders, Otis W Brawley, Ahmedin Jemal
BACKGROUND & AIMS: Previous studies reported that black vs white disparities in survival among elderly patients with colorectal cancer (CRC) were due to differences in tumor characteristics (tumor stage, grade, nodal status, and comorbidity) rather than differences in treatment. We sought to determine the sequential contribution of differences in insurance, comorbidity, tumor characteristics, and treatment receipt to the black-white survival disparity among patients with CRC in 18-64 years old...
November 13, 2017: Gastroenterology
https://www.readbyqxmd.com/read/29146037/comparative-effectiveness-research-methodology-using-secondary-data-a-starting-user-s-guide
#16
REVIEW
Maxine Sun, Stuart R Lipsitz
BACKGROUND: The use of secondary data, such as claims or administrative data, in comparative effectiveness research has grown tremendously in recent years. PURPOSE: We believe that the current review can help investigators relying on secondary data to (1) gain insight into both the methodologies and statistical methods, (2) better understand the necessity of a rigorous planning before initiating a comparative effectiveness investigation, and (3) optimize the quality of their investigations...
November 13, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/29145939/effect-of-retention-in-elementary-grades-on-dropping-out-of-school-early
#17
Jan N Hughes, Qian Cao, Stephen G West, Paula Allee Smith, Carissa Cerda
This study investigated the effect of grade retention in elementary school on dropping out of school by age 16. Participants were 538 (54% males) ethnically diverse, academically at-risk students recruited from Texas schools into a longitudinal study when they were in first grade (mean age=6.58). Propensity score weighting successfully equated the 171 retained students and the 367 continuously promoted students on 65 covariates assessed in grade 1. Fifty-one students dropped out of school by age 16 and 487 persisted...
December 2017: Journal of School Psychology
https://www.readbyqxmd.com/read/29145767/addressing-geographic-confounding-through-spatial-propensity-scores-a-study-of-racial-disparities-in-diabetes
#18
Melanie L Davis, Brian Neelon, Paul J Nietert, Kelly J Hunt, Lane F Burgette, Andrew B Lawson, Leonard E Egede
Motivated by a study exploring differences in glycemic control between non-Hispanic black and non-Hispanic white veterans with type 2 diabetes, we aim to address a type of confounding that arises in spatially referenced observational studies. Specifically, we develop a spatial doubly robust propensity score estimator to reduce bias associated with geographic confounding, which occurs when measured or unmeasured confounding factors vary by geographic location, leading to imbalanced group comparisons. We augment the doubly robust estimator with spatial random effects, which are assigned conditionally autoregressive priors to improve inferences by borrowing information across neighboring geographic regions...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/29145428/abnormal-brain-white-matter-microstructure-is-associated-with-both-pre-hypertension-and-hypertension
#19
Hideaki Suzuki, He Gao, Wenjia Bai, Evangelos Evangelou, Ben Glocker, Declan P O'Regan, Paul Elliott, Paul M Matthews
OBJECTIVES: To characterize effects of chronically elevated blood pressure on the brain, we tested for brain white matter microstructural differences associated with normotension, pre-hypertension and hypertension in recently available brain magnetic resonance imaging data from 4659 participants without known neurological or psychiatric disease (62.3±7.4 yrs, 47.0% male) in UK Biobank. METHODS: For assessment of white matter microstructure, we used measures derived from neurite orientation dispersion and density imaging (NODDI) including the intracellular volume fraction (an estimate of neurite density) and isotropic volume fraction (an index of the relative extra-cellular water diffusion)...
2017: PloS One
https://www.readbyqxmd.com/read/29144943/re-propensity-score-analysis-of-radical-cystectomy-versus-bladder-sparing-trimodal-therapy-in-the-setting-of-a-multidisciplinary-bladder-cancer-clinic
#20
keyword
keyword
35300
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"