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Asthma cluster analysis

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https://www.readbyqxmd.com/read/29221262/differences-in-airway-remodeling-and-airway-inflammation-among-moderate-severe-asthma-clinical-phenotypes
#1
Wen-Jing Ye, Wei-Guo Xu, Xue-Jun Guo, Feng-Feng Han, Juan Peng, Xiao-Ming Li, Wen-Bin Guan, Li-Wei Yu, Jin-Yuan Sun, Zhi-Lei Cui, Lin Song, Yue Zhang, Yan-Min Wang, Tian-Yun Yang, Xia-Hui Ge, Di Yao, Song Liu
Background: To identify asthma clinical phenotypes using cluster analysis and improve our understanding of heterogeneity in asthma. Methods: Clustering approaches were applied to 203 patients who were diagnosed with asthma in XinHua Hospital (January 2012 to December 2015). One hundred and twenty patients underwent multi-slice spiral computed tomography (MSCT) examination and 30 underwent bronchial mucosal biopsy for evaluation of airway remodeling and airway inflammation among the phenotypes...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29217598/phenotypes-of-symptomatic-airways-disease-in-china-and-new-zealand
#2
James Fingleton, Kewu Huang, Mark Weatherall, Yanfei Guo, Stefan Ivanov, Piet Bruijnzeel, Hong Zhang, Wei Wang, Richard Beasley, Chen Wang
It is uncertain whether phenotypes of asthma and chronic obstructive pulmonary disease (COPD) vary between populations with different genetic and environmental characteristics. Here, our objective was to compare the phenotypes of airways disease in two separate populations.This was a cross-sectional observational study in adult populations from New Zealand and China. Participants aged 40-75 years who reported wheeze and breathlessness in the last 12 months were randomly selected from the general population and underwent detailed characterisation...
December 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29211547/prenatal-exposure-to-polychlorinated-biphenyls-and-asthma-eczema-hay-fever-and-frequent-ear-infections
#3
Margaret Parker-Lalomio, Kenneth McCann, Julie Piorkowski, Sally Freels, Victoria W Persky
OBJECTIVES: The effects of prenatal exposure to Polychlorinated biphenyls (PCBs) on the development of asthma, frequent ear infections, and eczema/hay fever are not well understood. We aim to investigate associations between prenatal PCB exposure and these health outcomes in the offspring of women who worked at the LaSalle Electrical Utilities Company (EUC). METHODS: A retrospective cohort with at least one live birth and known employment time at EUC was eligible for this analysis...
December 6, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/29206834/influence-of-socioeconomic-status-on-the-whole-blood-transcriptome-in-african-americans
#4
Amadou Gaye, Gary H Gibbons, Charles Barry, Rakale Quarells, Sharon K Davis
BACKGROUND: The correlation between low socioeconomic status (SES) and poor health outcome or higher risk of disease has been consistently reported by many epidemiological studies across various race/ancestry groups. However, the biological mechanisms linking low SES to disease and/or disease risk factors are not well understood and remain relatively under-studied. The analysis of the blood transcriptome is a promising window for elucidating how social and environmental factors influence the molecular networks governing health and disease...
2017: PloS One
https://www.readbyqxmd.com/read/29200133/toluene-diisocyanate-exposure-exposure-assessment-and-development-of-cross-facility-similar-exposure-groups-among-toluene-diisocyanate-production-plants
#5
Paul J Middendorf, William Miller, Tim Feeley, Brent Doney
OBJECTIVE: The objective of this study was to characterize workplace toluene diisocyanate (TDI) exposures using standardized industrial hygiene exposure assessment procedures for use in a prospective epidemiologic study of occupational asthma. METHODS: Over 2300 representative routine full shift time-weighted average (TWA) and short-term high potential exposure tasks (HPETs) air samples in groups across three TDI plants were collected over a nearly 7-year period...
December 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29197099/identification-of-patterns-of-factors-preceding-severe-or-life-threating-asthma-exacerbations-in-a-nationwide-study
#6
H Tanaka, E Nakatani, Y Fukutom, K Sekiya, H Kaneda, M Iikura, M Yoshida, K Takahashi, K Tomii, M Nishikawa, N Kaneko, Y Sugino, M Shinkai, T Ueda, Y Tanikawa, T Shirai, M Hirabayashi, T Aoki, T Kato, K Iizuka, M Fujii, M Taniguchi
BACKGROUND: Reducing near-fatal asthma exacerbations is a critical problem in asthma management. OBJECTIVES: To determine patterns of factors preceding asthma exacerbations in a real-world setting. METHODS: In a nationwide prospective study of 190 patients who had experienced near-fatal asthma exacerbation, cluster analysis was performed using asthma symptoms over the two-week period before admission. RESULTS: Three distinct clusters of symptoms were defined employing the self-reporting of a visual analogue scale...
December 1, 2017: Allergy
https://www.readbyqxmd.com/read/29170004/identifying-patient-attitudinal-clusters-associated-with-asthma-control-the-european-realise-survey
#7
Thys van der Molen, Monica Fletcher, David Price
BACKGROUND: Asthma is a highly heterogeneous disease that can be classified into different clinical phenotypes, and treatment may be tailored accordingly. However, factors beyond purely clinical traits, such as patient attitudes and behaviors, can also have a marked impact on treatment outcomes. OBJECTIVE: The objective of this study was to further analyze data from the REcognise Asthma and LInk to Symptoms and Experience (REALISE) Europe survey, to identify distinct patient groups sharing common attitudes toward asthma and its management...
November 12, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29133218/cluster-analysis-identifies-3-phenotypes-within-allergic-asthma
#8
María Paz Sendín-Hernández, Carmelo Ávila-Zarza, Catalina Sanz, Asunción García-Sánchez, Elena Marcos-Vadillo, Francisco J Muñoz-Bellido, Elena Laffond, Christian Domingo, María Isidoro-García, Ignacio Dávila
BACKGROUND: Asthma is a heterogeneous chronic disease with different clinical expressions and responses to treatment. In recent years, several unbiased approaches based on clinical, physiological, and molecular features have described several phenotypes of asthma. Some phenotypes are allergic, but little is known about whether these phenotypes can be further subdivided. OBJECTIVE: We aimed to phenotype patients with allergic asthma using an unbiased approach based on multivariate classification techniques (unsupervised hierarchical cluster analysis)...
November 10, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29131887/effect-of-an-intervention-to-promote-breastfeeding-on-asthma-lung-function-and-atopic-eczema-at-age-16-years-follow-up-of-the-probit-randomized-trial
#9
Carsten Flohr, A John Henderson, Michael S Kramer, Rita Patel, Jennifer Thompson, Sheryl L Rifas-Shiman, Seungmi Yang, Konstantin Vilchuck, Natalia Bogdanovich, Mikhail Hameza, Richard M Martin, Emily Oken
Importance: Atopic diseases, including asthma and atopic eczema, are the most common chronic conditions of childhood. Objective: To investigate whether an intervention to promote prolonged and exclusive breastfeeding protects against asthma, atopic eczema, and low lung function in adolescence. Design, Setting, and Participants: Follow-up of the Promotion of Breastfeeding Intervention Trial (PROBIT), a cluster randomized trial in 30 Belarusian maternity hospitals and affiliated polyclinics; recruitment of 17 046 healthy term infants took place from June 15, 1996, to December 31, 1997...
November 13, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/29100865/clinical-phenotypes-of-nasal-polyps-and-comorbid-asthma-based-on-cluster-analysis-of-disease-history
#10
Dawei Wu, Benjamin S Bleier, Lun Li, Xiaojun Zhan, Lichuan Zhang, Qianwen Lv, Jianting Wang, Yongxiang Wei
BACKGROUND: Nasal polyps and comorbid asthma (NPcA) is a common united airway disease and is highly heterogeneous with respect to clinical, physiologic, and pathologic parameters. The clinical phenotypes of NPcA are poorly understood. OBJECTIVE: We sought to explore clinical phenotypes in patients with NPcA. METHODS: Patients first diagnosed with NPcA were recruited from Rhinological Clinics and Respiratory Clinics. We clustered patients with NPcA based on parameters regarding natural courses and demographic characteristics...
October 31, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29082708/-compatible-principles-of-xiebai-decoction-family-based-on-complex-network-analysis
#11
Peng-Li Wang, Yu-Hao Fan, Xin-Sheng Fan, Chong-Jun Wang
In order to explore the compatible principles of Xiebai decoction family, formulae from ancient and modern Xiebai decoction family were collected and sorted in this study. The compatible characteristics, core herbs, as well as the relativity of herbs nature in Xiebai decoction family were analyzed based on scale free network and other data-mining methods such as association rules, clustering analysis and correspondence analysis. The scale free network results showed that in Xiebai decoction family, Mori Cortex-Lycii Cortex-Glycyrrhizae Radix et Rhizoma was used as the core compatible group and formed the complicated compatible network with other additional herbs; association rules results showed that the core herbs in such formulae included Mori Cortex, Lycii Cortex, Glycyrrhizae Radix et Rhizoma, scutellaria root, Platycodon root, Anemarrhena, and almond, which formed corresponding herbal pairs and compatibility; clustering analysis showed that Mori Cortex was the core herb in Xiebai decoction family, and Mori Cortex-Lycii Cortex-Glycyrrhizae Radix et Rhizoma was its main combination unit, which was always compatible with herbs of clearing heat, reducing phlegm, supplementing Qi and nourishing Yin to form the series prescriptions...
May 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29075476/phylogeographic-and-phylogenetic-analysis-for-tripterygium-species-delimitation
#12
Baowei Ma, Tianyuan Hu, Pei Li, Qingjun Yuan, Zhaoshou Lin, Yuhe Tu, Jia Li, Xianan Zhang, Xiaoyi Wu, Xiujuan Wang, Luqi Huang, Wei Gao
Tripterygium wilfordii (Celastraceae) is a traditional Chinese medicine; and the dried root and rhizome constitute the main officinal parts. Tripterygium wilfordii has been identified as a potential candidate for the treatment of systemic lupus erythematosus, rheumatoid arthritis, nephritis, asthma, leprosy, and cancer. The phylogenetic relationships within the Tripterygium genus are ambiguous; thus, our aim is to clarify the relationships within this genus using phylogeographic and phylogenetic analyses. Here, we first sequenced three plastid DNA regions (i...
October 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29029627/determinants-of-self-rated-health-among-shanghai-elders-a-cross-sectional-study
#13
Weizhen Dong, Jin Wan, Yanjun Xu, Chun Chen, Ge Bai, Lyuying Fang, Anjiang Sun, Yinghua Yang, Ying Wang
BACKGROUND: As the most populous nation in the world, China has now becoming an emerging ageing society. Shanghai is the first city facing the challenge of ageing demographics. Against this background, a study that employs self-rated health (SRH) assessment system was designed to explore the health status of Shanghai elders, and learn their attitudes toward health issues; as well as to investigate the determinants of SRH among Shanghai elders. Understanding SRH is crucial for finding appropriate solutions that could effectively tackle the increasing eldercare demand...
October 13, 2017: BMC Public Health
https://www.readbyqxmd.com/read/29029580/uncovering-longitudinal-health-care-behaviors-for-millions-of-medicaid-enrollees-a-multistate-comparison-of-pediatric-asthma-utilization
#14
Ross Hilton, Yuchen Zheng, Anne Fitzpatrick, Nicoleta Serban
BACKGROUND: This study introduces a framework for analyzing and visualizing health care utilization for millions of children, with a focus on pediatric asthma, one of the major chronic respiratory conditions. METHODS: The data source is the 2005 to 2012 Medicaid Analytic Extract claims for 10 Southeast states. The study population consists of Medicaid-enrolled children with persistent asthma. We translate multiyear, individual-level medical claims into sequences of discrete utilization events, which are modeled using Markov renewal processes and model-based clustering...
October 1, 2017: Medical Decision Making: An International Journal of the Society for Medical Decision Making
https://www.readbyqxmd.com/read/29025889/characterisation-of-asthma-subgroups-associated-with-circulating-ykl-40-levels
#15
Jose L Gomez, Xiting Yan, Carole T Holm, Nicole Grant, Qing Liu, Lauren Cohn, Vera Nezgovorova, Deborah A Meyers, Eugene R Bleecker, Gina M Crisafi, Nizar N Jarjour, Linda Rogers, Joan Reibman, Geoffrey L Chupp
The chitinase-like protein YKL-40 mediates airway inflammation and serum levels are associated with asthma severity. However, asthma phenotypes associated with YKL-40 levels have not been precisely defined.We conducted an unsupervised cluster analysis of asthma patients treated at the Yale Center for Asthma and Airways Disease (n=156) to identify subgroups according to YKL-40 level. The resulting YKL-40 clusters were cross-validated in cohorts from the Severe Asthma Research Programme (n=167) and the New York University/Bellevue Asthma Repository (n=341)...
October 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28986128/vitamin-d-supplementation-to-prevent-asthma-exacerbations-a-systematic-review-and-meta-analysis-of-individual-participant-data
#16
David A Jolliffe, Lauren Greenberg, Richard L Hooper, Christopher J Griffiths, Carlos A Camargo, Conor P Kerley, Megan E Jensen, David Mauger, Iwona Stelmach, Mitsuyoshi Urashima, Adrian R Martineau
BACKGROUND: A previous aggregate data meta-analysis of randomised controlled trials showed that vitamin D supplementation reduces the rate of asthma exacerbations requiring treatment with systemic corticosteroids. Whether this effect is restricted to patients with low baseline vitamin D status is unknown. METHODS: For this systematic review and one-step and two-step meta-analysis of individual participant data, we searched MEDLINE, Embase, the Cochrane Central Register of Controlled Trials, and Web of Science for double-blind, placebo-controlled, randomised controlled trials of vitamin D3 or vitamin D2 supplementation in people with asthma that reported incidence of asthma exacerbation, published between database inception and Oct 26, 2016...
November 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28974677/longitudinal-outcomes-of-different-asthma-phenotypes-in-primary-care-an-observational-study
#17
Rishi J Khusial, Jacob K Sont, Rik J B Loijmans, Jiska B Snoeck-Stroband, Pim J J Assendelft, Tjard R J Schermer, Persijn J Honkoop
While asthma presentation is heterogeneous, current asthma management guidelines in primary care are quite homogeneous. In this study we aim to cluster patients together into different phenotypes, that may aid the general practitioner in individualised asthma management. We analysed data from the ACCURATE trial, containing 611 adult asthmatics, 18-50 year-old, treated in primary care, with one year follow-up. Variables obtained at baseline (n = 14), were assessed by cluster analysis. Subsequently, established phenotypes were assessed separately on important asthma outcomes after one year follow-up: asthma control (Asthma Control Questionnaire (ACQ)), quality of life (Asthma Quality of Life Questionnaire (AQLQ)), exacerbation-rate and medication-usage...
October 3, 2017: NPJ Primary Care Respiratory Medicine
https://www.readbyqxmd.com/read/28972652/shared-decision-making-for-people-with-asthma
#18
REVIEW
Kayleigh M Kew, Poonam Malik, Krishnan Aniruddhan, Rebecca Normansell
BACKGROUND: Asthma is a chronic inflammatory disease that affects the airways and is common in both adults and children. It is characterised by symptoms including wheeze, shortness of breath, chest tightness, and cough. People with asthma may be helped to manage their condition through shared decision-making (SDM). SDM involves at least two participants (the medical practitioner and the patient) and mutual sharing of information, including the patient's values and preferences, to build consensus about favoured treatment that culminates in an agreed action...
October 3, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28960398/nasal-protein-profiles-in-work-related-asthma-caused-by-different-exposures
#19
H Suojalehto, I Lindström, H Wolff, A Puustinen
BACKGROUND: The mechanisms of work-related asthma (WRA) are incompletely delineated. Nasal cell samples may be informative about processes in the lower airways. Our aim was to determine the nasal protein expression profiles of WRA caused by different kind of exposures. METHODS: We collected nasal brush samples from 82 nonsmoking participants, including healthy controls and WRA patients exposed to (i) protein allergens, (ii) isocyanates and (iii) welding fumes the day after relevant exposure...
September 28, 2017: Allergy
https://www.readbyqxmd.com/read/28929787/-phenotypes-of-bronchial-asthma
#20
László Béla Nagy
It is increasingly recognized that the bronchial asthma is a heterogeneous entity, encompassing a variety of different phenotypes. The identification of specific phenotypes is the key to develop more effective personalised treatment. The earliest attempt to phenotype asthma was proposed classifying into extrinsic and intrinsic subtypes. Clinical asthma is mainly divided into allergic (atopic) and non-allergic (non-atopic) asthma. Other phenotypes are based on trigger factors. Later the phenotyping based on the predominant cellular nature of inflammation: It can be divided into eosinophilic and non-eosinohilic...
April 2017: Orvosi Hetilap
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