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Facial dermatosis associated with Demodex:a case-control study

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第12期12卷 1008-1015页

作者： Ya-e ZHAO Yan PENG Xiang-lan WANG Li-ping WU Mei WANG Hu-ling YAN Sheng-xiang XIAO Department of Immunology and Pathogen Biology Xi ＇an Jiaotong University College of Medicine Xi ＇an 710061 China Xi ＇an Center for Disease Control and Prevention Xi ＇an 710054 China Department of Dermatology the Second Affiliated Hospital Xi ＇an Jiaotong University College of Medicine Xi ＇an 710004 China Department of Clinical Laboratory Chengdu First People＇s Hospital Chengdu 610041 China

Demodex has been considered to be related with multiple skin disorders,but controversy persists.In this case-control study,a survey was conducted with 860 dermatosis patients aged 12 to 84 years in Xi'an,China to identify the association between facial dermatosis and Demodex.Amongst the patients,539 suffered from facial dermatosis and 321 suffered from non-facial dermatosis.Demodex mites were sampled and examined using the skin pressurization method.Multivariate regression analysis was applied to analyze the association between facial dermatosis and Demodex infestation,and to identify the risk factors of Demodex infestation.The results showed that total detection rate of Demodex was 43.0%.Patients aged above 30 years had higher odds of Demodex infestation than those under 30 years.Compared to patients with neutral skin,patients with mixed,oily,or dry skin were more likely to be infested with Demodex(odds ratios(ORs) were 2.5,2.4,and 1.6,respectively).Moreover,Demodex infestation was found to be statistically associated with rosacea(OR=8.1),steroid-induced dermatitis(OR=2.7),seborrheic dermatitis(OR=2.2),and primary irritation dermatitis(OR=2.1).In particular,ORs calculated from the severe infestation(≥5 mites/cm2) rate were significantly higher than those of the total rate.Therefore,we concluded that Demodex is associated with rosacea,steroid-induced dermatitis,seborrheic dermatitis,and primary irritation dermatitis.The rate of severe infestation is found to be more correlated with various dermatosis than the total infestation rate.The risk factors of Demodex infestation,age,and skin types were identified.Our study also suggested that good hygiene practice might reduce the chances of demodicosis and Demodex infestation.

关键词：面部皮肤病 Demodex 群袭协会盒子控制学习变老

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A meta-analysis of association between acne vulgaris and Demodex infestation

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第3期13卷 192-202页

作者： Ya-e ZHAO Li HU Li-ping WU Jun-xian MA Department of Immunology and Pathogen Biology Xi ＇an Jiaotong University College of Medicine Xi ＇an 710061 China

Until now, etiology of acne vulgaris is still uncertain. Although clinicians usually deny the association between Demodex infestation and acne vulgaris, it has been proved in some clinical practices. To confirm the association between Demodex infestation and acne vulgaris, a meta-analysis was conducted. Predefined selection criteria were applied to search all published papers that analyzed the association between Demodex infestation and acne vulgaris (January 1950 to August 2011) in ISI Web of Knowledge, MEDLINE, and China National Knowledge Infrastructure (CNKI) databases. A meta-analysis was performed to calculate odds ratios (ORs) and 95% confidence intervals (CIs) based on fixed effects models or random effects models. We enrolled the 60 Chinese and 3 English papers in this meta-analysis, which covered Turkey and 25 different provinces/municipalities in China and 42 130 participants in-cluding students and residents, aged from 1 to 78 years. The pooled OR in random effects models is 2.80 (95% CI, 2.34-3.36). Stability is robust according to sensitivity analysis. The fail-safe number is 18 477, suggesting that at least 18 477 articles with negative conclusions would be needed to reverse the conclusion that acne vulgaris was related to Demodex infestation. So the effect of publication bias was insignificant and could be ignored. It was concluded that acne vulgaris is associated with Demodex infestation. This indicates that when regular treatments for acne vulgaris are ineffective, examination of Demodex mites and necessary acaricidal therapies should be considered.

关键词： Demodex 群袭粉刺 vulgaris 盒子控制学习元分析

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Statin use and the risk of colorectal cancer: A population-based case-control study

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World Journal of Gastroenterology 2011年第47期17卷 5197-5202页

作者： Meng-Hsuan Cheng Hui-Fen Chiu Shu-Chen Ho Shang-Shyue Tsai Trong-Neng Wu Chun-Yuh Yang Division of Pulmonary and Critical Medicine Department of Internal Medicine Kaohsiung Medical University Hospital Graduate Institute of Medicine Kaohsiung Medical University Department of Internal Medicine PingTung HospitalDepartment of Health Executive Yuan Institute of Pharmacology College of Medicine Kaohsiung Medical University Institute of Occupational Safety and Health College of Health Sciences Kaohsiung Medical University Department of Healthcare Administration I-Shou University Department of Public Health China Medical University Division of Environmental Health and Occupational Medicine National Health Research Institute Faculty of Public Health College of Health Sciences Kaohsiung Medical University

AIM: To investigate whether the use of statins is associated with colorectal cancer risk. METHODS: We conducted a population-based case-control study in Taiwan. Data were retrospectively collected from the Taiwan National Health Insurance Research Database. Cases consisted of all patients who were aged 50 years and older and had a first-time diagnosis of colorectal cancer between the period 2005 and 2008. The controls were matched to cases by age, sex, and index date. Adjusted odds ratios (ORs) and 95% confidence intervals (CIs) were estimated using multiple logistic regression. RESULTS: We examined 1156 colorectal cancer cases and 4624 controls. The unadjusted ORs for any statin prescription was 1.10 (95% CI = 0.94-1.30) and the adjusted OR was 1.09 (95% CI = 0.91-1.30). When statin use was categorized by cumulative dose, the adjusted ORs were 0.99 (95% CI = 0.78-1.27) for the group with cumulative statin use below 105 defined daily doses (DDDs); 1.07 (95% CI = 0.78-1.49) for the group with cumulative statin use between 106 and 298.66 DDDs; and 1.30 (95% CI = 0.96-1.75) for the group with cumulative statin use of 298.66 DDDs or more compared with nonusers. CONCLUSION: This study does not provide support for a protective effect of statins against colorectal cancer.

关键词：盒子控制学习 Colorectal 癌症 Pharmacoepidemiology Statins

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