characteristics of case control study design

Báo cáo y học: "Comparative study of control selection in a national population -based case-control study: Estimating risk of smoking on cancer deaths in Chinese men"

Ngày tải lên : 26/10/2012, 09:48

... con- sistent pattern of the effect of smoking on risk of cancer deaths. TABLE 1. Characteristics of cases and two control groups: Population-based case- control study of smoking on risk of cancer deaths ... principles of a population-based case- control study to assess the validation of the novel control selection design by comparing the consistency between the new design and a routine control selection ... 152,579 controls (103,248 in control group 1; 49,331 in control group 2) in our study. The basic characteristics of the cases and controls, and relative risk of smoking-related cancer deaths...

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The Diesel Exhaust in Miners Study: A Nested Case–Control Study of Lung Cancer and Diesel Exhaust pptx

Ngày tải lên : 22/03/2014, 17:20

... cause of death; 80% of control subjects who were current smokers of one or more packs per day died of a smoking-related cause compared with 60% of control subjects who never smoked. This study ... exposures. Study design A nested case control study of lung cancer and DE in a cohort of 12 315 workers in eight non-metal mining facilities included 198 lung cancer deaths and 562 control subjects. ... lung cancer. Of the 217 eligible case subjects identified, we interviewed 213 (98.1%) of their next of kin. Control Subject Selection for the Nested Case Control Study Based on incidence density...

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báo cáo hóa học:" A MIF haplotype is associated with the outcome of patients with severe sepsis: a case control study" pdf

Ngày tải lên : 18/06/2014, 15:20

... 1 of 8 (page number not for citation purposes) Journal of Translational Medicine Open Access Research A MIF haplotype is associated with the outcome of patients with severe sepsis: a case control ... LG: The SOFA (Sepsis-related Organ Failure Assessment) score to describe organ dysfunction/ failure. On behalf of the Working Group on Sepsis-Related Problems of the European Society of Intensive ... comparable to both control groups. However, the genotype and allele frequencies of both polymorphisms were associated significantly with the outcome of severe sepsis. The highest risk of dying from...

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Báo cáo hóa học: "Prognostic impact of clinical course-specific mRNA expression profiles in the serum of perioperative patients with esophageal cancer in the ICU: a case control study" potx

Ngày tải lên : 18/06/2014, 16:20

... Prognostic impact of clinical course- specific mRNA expression profiles in the serum of perioperative patients with esophageal cancer in the ICU: a case control study. Journal of Translational ... line refer to IL-6 mRNA, IL-6, mean of normal IL-6 level in plasma, and predictive cut-off level of IL-6 mRNA, respectively. (c) SPSS software analysis of the AUC of the ROC curve was 0.809 and 0.453 ... Journal of Translational Medicine 2010, 8:103 http://www.translational-medicine.com/content/8/1/103 Page 8 of 11 Recently, the use of gene-expression profiling on a transcriptome level of peripheral...

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Báo cáo hóa học: "Case-Control study of Firefighters with documented positive tuberculin skin test results using Quantiferon-TB testing in comparison with Firefighters with negative tuberculin skin test results" potx

Ngày tải lên : 20/06/2014, 00:20

... effectively monitored our working population. 12.9% of the 148 cases, and 3.2% of the 220 controls had a positive QFT result. Another 14.8% of cases and 4.5% of controls had conditionally positive QFT results. ... direct part of the study, we noted that a subset of the subject cases (35) have had recent TBST's (within the last 3 years) as part of their ongoing medical evaluations. Only 4 of the cases had ... (34.0%) of the total 368 firefighters, and were equally distributed among cases and controls. For all positive TBST cases, 47 (31.8%) of 148 were positive for MA, while 78 (35.5%) of 220 positive...

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báo cáo hóa học: " The role of cumulative physical work load in symptomatic knee osteoarthritis – a case-control study in Germany" potx

Ngày tải lên : 20/06/2014, 00:20

... study design, performed the statistical analysis and drafted the manuscript, UB participated in the study design and and helped to draft the manuscript, NA participated in the design of the study ... by cases would lead to an overestimation of risks. Otherwise, a non-differential overestimation of physical workload (in both cases and control subjects) would lead to an under- estimation of ... and a non-differential approach to cases and controls. Participants were not informed of the specific aims of the study. They were asked to participate in a study concerning the theme 'occupation...

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báo cáo hóa học:" Predictive value of ovarian stroma measurement for cardiovascular risk in polycyctic ovary syndrome: a case control study" pptx

Ngày tải lên : 20/06/2014, 07:20

... number of follicles, whereas it is not expression of PCOS endocrine impairment. In this study, reproducibility of the measurements of stromal volume was very close to that of ovarian volume and of ... distance from the leading edge of the second echogenic line of the far walls of the distal segment of the common carotid artery, the carotid bifurcation, and the initial tract of internal carotid artery on ... and dou- bling of cross-sectional ovarian area, observed by ultra- sound, has been shown to be expression of a marked increase (33%) of cortical portion, and of a five-fold increase of medullar...

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báo cáo hóa học:" Double disadvantage: a case control study on health-related quality of life in children with sickle cell disease" potx

Ngày tải lên : 20/06/2014, 15:20

... KF designed and supervised execution of the study, interpreted the data and drafted and revised the manuscript. JO, HH and MP supervised execution of the study and revised the manuscript. MAG designed ... disadvantage: a case control study on health-related quality of life in children with sickle cell disease. Health and Quality of Life Outcomes 2010 8:121. Hijmans et al. Health and Quality of Life Outcomes ... and Quality of Life Outcomes 2010, 8:121 http://www.hqlo.com/content/8/1/121 Page 6 of 8 RESEARC H Open Access Double disadvantage: a case control study on health-related quality of life in children...

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Báo cáo y học: " ncremental cost effectiveness of proton pump inhibitors for the prevention of non-steroidal anti-inflammatory drug ulcers: a pharmacoeconomic analysis linked to a case-control study" potx

Ngày tải lên : 09/08/2014, 01:22

... than in the cases (cases 14 (13.5%) and controls 77 (27.1%); p = 0.005). Use of selective COX-2 inhibitors was comparable (cases 17 (16.4%) and controls 50 (17.6%); p = 0.77). Use of the preferential ... admission: standard care Number of days Cost manual of Oostenbrink 337.00 Intensive care Number of days Cost manual of Oostenbrink 1,684.00 Emergency department Number of visits Cost manual of Oostenbrink 139.00 Ambulance ... transportation: Emergency Number of transports Cost manual of Oostenbrink 443.00 Regular Number of transports Cost manual of Oostenbrink 212.00 Blood products: Packed cells Number of units Cost manual of Oostenbrink...

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báo cáo khoa học: "The efficacy of preopoerative instruction in reducing anxiety following gyneoncological surgery: a case control study" pptx

Ngày tải lên : 09/08/2014, 01:24

... treated. 2. Methods 2.1. Type of the Study This is a qua si-experimental research based on one study group and one control group and it focuses on the study of the i mpact of systematic preoperative instruction ... found that anxiety was experi- enced at a rate of 80% and the fear of not being able to get rid of cancer and the fear of impairment of the quality of life were p articularly effective on anxiety. ... some characteristics of the participant and anxiety scores of patients. 3. Results The researchers divided the sample groups into one study group and one control group, each consisting of 60...

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Báo cáo y học: "Prescription channeling of COX-2 inhibitors and traditional nonselective nonsteroidal anti-inflammatory drugs: a population-based case–control study" pot

Ngày tải lên : 09/08/2014, 06:22

... compare the characteristics of patients prescribed celecoxib and rofecoxib, which are the two COX-2 inhibitors marketed in Canada at the time of the study. Methods Design A case control analysis ... the interpretation of the study results. SP assisted in the review of the literature and determined the relevance of the study. SZ conceived the study and participated in its design. All authors ... compared. The study population consisted of a random sample of members of the Quebec drug plan (age 18 years or older) who received at least one dispensation of celecoxib (n = 42,422; cases), rofecoxib...

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Báo cáo y học: "Association of functional variants of PTPN22 and tp53 in psoriatic arthritis: a case-control study" docx

Ngày tải lên : 09/08/2014, 07:20

... collected systematically and included age at onset of psoriasis and PsA, and disease pattern. The control individuals (controls) were of similar ethnicity to the patients (cases). Controls for the New- foundland ... al. Page 2 of 3 (page number not for citation purposes) Materials and methods This study was approved by the local ethics committee of the Memorial University of Newfoundland and University of Toronto. ... participated in study design, and drafted the initial manuscript. LP assisted in gen- otyping some of the control individuals. SH aided in recruit- ment and clinical phenotyping of PsA patients....

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Báo cáo y học: "Detailed analysis of the variability of peptidylarginine deiminase type 4 in German patients with rheumatoid arthritis: a case– control study" docx

Ngày tải lên : 09/08/2014, 07:20

... (10.8%) of the healthy controls included in the present study. Three of these resulted in amino acid substitutions. Nine (8.8%) of the RA patients from the present study exhibited five of these ... result of this study, the fre- quency of uncommon PADI4 variants as identified earlier [8] was apparently not different quantitatively or qualitatively between patients and controls. Of note, ... (Berlin, Germany). The designations of the PADI4 haplotypes are in accordance with those of Suzuki and colleagues [7]. The positions of novel exonic or intronic PADI4 variants were designated relative...

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Báo cáo y học: " A 1-year case-control study in patients with rheumatoid arthritis indicates prevention of loss of bone mineral density in both responders and nonresponders to infliximab" docx

Ngày tải lên : 09/08/2014, 10:20

... historical control study, with controls being active RA patients followed before the advent of TNF-α blocker therapy and who were treated with methotrexate alone. Such a historical control group is of ... Cary, NC, USA) software. Results Control and infliximab group characteristics at baseline Demographic, clinical, biological and BMD characteristics of the 189 RA patients enrolled in the study are ... 1 year of infliximab treatment [10]. However, in none of these studies was a control group included, preventing a true estimation of the effect of anti-TNF- a treatment on bone. In this study, ...

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Báo cáo y học: "Diurnal secretion of growth hormone, cortisol, and dehydroepiandrosterone in pre- and perimenopausal women with active rheumatoid arthritis: a pilot case-control study" ppt

Ngày tải lên : 09/08/2014, 10:20

... [4]. Several limitations of this study deserve comment. Because of strict inclusion and exclusion criteria, the accrual of patients with RA was below the intended number of subjects planned. Consequently, ... Institutes of Health (NIH), and all participants pro- vided written informed consent. Study design Study participants were admitted to the Clinical Research Center on the evening of day 1 to ... Blackman et al. Page 4 of 9 (page number not for citation purposes) Table 1 Characteristics of patients with rheumatoid arthritis Variables Rheumatoid arthritis (n = 7) Controls (n = 10) Age (years)...