cohort versus case control models

Báo cáo y học: "Association of the microsatellite in the 3'''' untranslated region of the CD154 gene with rheumatoid arthritis in females from a Spanish cohort: a case-control study" ppsx

... cells from patients with RA Materials and methods Patients and controls The study used a case- control design to compare patients and controls A total of 189 patients diagnosed with RA according ... frequencies between patients and controls in males and females separately We observed statistical differences in the 24CAs allele frequency in females (0.44 in healthy controls versus 0.31 in patients; ... to 0.83; power 0.82) but not in males (0.41 versus 0.41) Similarly, differences were found in the 26CAs allele in females (0.03 in healthy controls versus 0.09 in patients; P = 0.033; OR 3.04,...

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Báo cáo y học: "Attributable mortality of Acinetobacter baumannii infections in critically ill patients: a systematic review of matched cohort and case-control studies" doc

Danh mục: Báo cáo khoa học

... with matched controls Reference Site of infection; patients and setting Cases Controls Matching of controls to cases Colonization or infection Mortality Length of ICU stay (days) Cases Controls p ... baumannii) Reference Site of infection; patients and setting Cases Controls Matching of controls to cases Mortality Length of ICU stay (days) Cases Bacteremia; medical, surgical, burn, and cardiac ... were case- control or matched cohort studies that compared mortality and/ or morbidity of patients with acquisition of or infection with Page of Characteristics and outcomes of matched cases and controls...

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Báo cáo y học: " Mid-term outcomes for Endoscopic versus Open Vein Harvest: a case control study" pptx

Danh mục: Báo cáo khoa học

... case- control study of all consecutive first-time isolated CABG using at least one vein graft from a single surgeon in our centre A study group undergoing endoscopic vein harvest (EVH) and a control ... disservice A retrospective analysis of the cohort that had already undergone EVH was deemed to be the most appropriate way of reviewing our results We opted for a case- control study from a single surgeon ... confounding factors introduced by different surgical techniques or management While the case and control cohorts were chronologically separated, any benefits conferred by the contemporary nature...

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Báo cáo y học: "Conventional intramuscular sedatives versus ziprasidone for severe agitation in adolescents: case-control study" ppt

Danh mục: Báo cáo khoa học

... in 17/52 cases; the most common agents were cannabis (N = 14), benzodiazepines (N = 5), and cocaine (N = 4) There was no difference in the hospitalization rate for the groups In all cases the ... outcome of unselected cases that were typical of severely agitated adolescents who presented to a PES We defined severe agitation as episodes requiring physical restraint Cases were identified ... identified by searching restraint logs Hence, cases of IM medication use not requiring restraints were not captured Although the samples represented a consecutive case series, the patients were not randomly...

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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"

Danh mục: Y học thưởng thức

... 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 design in a large case- control ... There were a total of 130,079 cases and 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 ... TABLE Characteristics of cases and two control groups: Population-based case- control study of smoking on risk of cancer deaths among Chinese men 1989–1991 Characteristic Cases No of subjects 130,079...

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Tài liệu OPTIMAL CONTROL MODELS IN FINANCE pdf

Danh mục: Ngân hàng - Tín dụng

... except at a null set Optimal Control Models Bang-Bang Control In some optimal control problems, when the dynamic equation is linear in the control bang-bang control (the control only jumps on the ... different models Optimal control models in finance can take different forms including the following: bang-bang control, deterministic and stochastic models, finite and infinite horizon models, ... optimal control is called bangbang control The concept can also be used to explain a control: where the optimal control only takes two possible cases or depending on the initial value of the control...

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Breast cancer risk in relation to occupations with exposure to carcinogens and endocrine disruptors: a Canadian case–control study pptx

Danh mục: Sức khỏe giới tính

... (Table 1) Very few subjects reported no employment (4 controls, cases; Table 1) Cumulative exposure was similar or less in cases versus controls in some major sectors of interest – petrochemicals, ... frequency-matched case control analyses using a loglinear specification in multiple conditional logistic regression [41] Matching was achieved by stratifying the cases and controls in three-year ... breast cancer cases and controls Results Of 1,553 breast cancer cases referred, 160 were ineligible and 222 were unable to be reached Of the remainder, 165 declined, leaving 1006 cases for a participation...

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Occupation and Breast Cancer: A Canadian Case–Control Study docx

Danh mục: Sức khỏe giới tính

... administrative, cohort, and case- controls studies.38 Of 10 administrative and cohort studies, found a positive association with breast cancer39−46 while did not.47,48 Among six case control studies31,49–53 ... (19.7%) 256 (22.1%) 447 (38.9%) 337 (29.5%) cases = 12 (1%) cases = (.5%) Missing cases = 14 (1.2%) Missing cases = 21 (1.8%) Missing Missing age of controls = 58.64); education level; annual ... age of cases = 60.33, mean BROPHY et al.: OCCUPATION AND BREAST CANCER 769 TABLE Descriptive profile of 564 female breast cancer cases and 599 female community controls Breast cancer cases Community...

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Associated factors for treatment delay in pulmonary tuberculosis in HIV-infected individuals: a nested case-control study docx

Danh mục: Sức khỏe giới tính

... physician through laboratory confirmation by sputum smear and/or A nested case- control study was undertaken within a cohort of HIV-infected individuals, aged 18 years and Patient recruitment ... misclassification (patients mistakenly classified as TB cases) (Figure 1) Methods Definition of terms and variables Study design and population Cases of active pulmonary TB were those for whom TB ... monitored by these services before the onset of cough A study case was defined as a patient who presented a delay in initiating treatment and a control as a patient who did not present a delay in initiating...

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

Danh mục: Sức khỏe giới tính

... 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 The case control study ... the case subject died With this design, all cohort members were eligible to serve as control subjects for more than one case subject, and case subjects before death were eligible to serve as control ... to 2.23; 16 case subjects and 42 control subjects), 1.76 (95% CI = 0.11 to 27.91; 10 case subjects and 23 control subjects), and 3.66 (95% CI = 0.26 to 52.09; 20 case subjects and 31 control subjects),...

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The Reproductive Value in Distributed Optimal Control Models potx

Danh mục: Sức khỏe phụ nữ

... Optimal Control Models Stefan Wrzaczek, Michael Kuhn, Alexia Prskawetz, Gustav Feichtinger Introduction In population biology and more general mathematical demography, optimal control models for ... While the fertility rate of infected individuals is reduced by the control, as is the case for susceptible individuals, in this case the weighted sum of the shadow price of newborn susceptibles ... states and the distributed controls Finally we have to consider the control vector u(a, t) = u1 (a, t), , un (a, t) ∈ U Together with the boundary and initial controls, v(t) and w(a), previously...

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Access Control Models: From the real-world to trusted computing potx

Danh mục: An ninh - Bảo mật

... Access Control (MAC) Models  Mandatory Access Control (MAC): When a system mechanism controls access to an object and an individual user cannot alter that access, the control is mandatory access control ... Security Models  We want models that represent a range of sensitivities and that separate subjects from the objects they should not have access to  The military has developed various models for ... securing information  We will look at several models for multilevel security – Object-by-Object Methods: Directory lists, Access control lists, Access control matrix, Take-Grant Model – Lattice...

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optimal control models in finance a new computational approach

Danh mục: Quản trị kinh doanh

... except at a null set Optimal Control Models Bang-Bang Control In some optimal control problems, when the dynamic equation is linear in the control bang-bang control (the control only jumps on the ... different models Optimal control models in finance can take different forms including the following: bang-bang control, deterministic and stochastic models, finite and infinite horizon models, ... optimal control is called bangbang control The concept can also be used to explain a control: where the optimal control only takes two possible cases or depending on the initial value of the control...

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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

Danh mục: Hóa học - Dầu khí

... analyzed by real-time PCR were also genotyped by DNA sequencing to control for the accuracy of the real-time PCR method All controlled samples had matching results between real-time PCR and DNA ... infection or inflammation, without ICU admission and without case of death within the first postoperative 28 days served as two separate control groups Furthermore, local wound infection rates reflected ... either of the control groups The genotype distribution and allele frequencies for the -173 SNP and the -794 microsatellite were comparable between the severe sepsis patients and the two control groups...

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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

Danh mục: Hóa học - Dầu khí

... expression profiles in the serum of perioperative patients with esophageal cancer in the ICU: a case control study Journal of Translational Medicine 2010 8:103 Submit your next manuscript to BioMed ... (recovery from SIRS) *: p < 0.05, N.S.: not significant (right) Clinical courses in two PMX-treated cases (#9: solid line and #11: dotted line) are shown There were no significant relationships between ... previously been described as a prognosticator in fulminant hepatitis [11] although this was not the case in our study Expression of CRP mRNA correlated with the serum CRP level at all clinical phases,...

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báo cáo hóa học: " Microglia activation in sepsis: a case-control study" ppt

Danh mục: Hóa học - Dầu khí

... http://www.jneuroinflammation.com/content/4/1/4 Figure Flow chart of selection of cases and controls Flow chart of selection of cases and controls * Questionable cases: systemic diseases or diseases with a (possible) effect ... (polytomous logit universal models) A value of P < 0.05 was considered statistically significant Results Cases and controls Demographic characteristics of cases and controls are listed in Table ... microglia, endothelial cells stained positive in cases and in controls Some clustering of microglia was observed in a few specimen in both cases and controls http://www.jneuroinflammation.com/content/4/1/4...

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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

Danh mục: Hóa học - Dầu khí

... 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 MA responses came from the control group These results ... comparison of the study cases to the base population, showing a good representation of the population of concern Table shows the comparison of the QFT results in both the Case and Control groups Although ... usage Of the 148 cases with a positive TBST, 19 (12.8%) resulted in a positive QFT TB response, while 22 subjects (14.8%) resulted in a conditionally positive response Of the 220 controls (firefighters...

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Báo cáo hóa học: " Solvent exposure and malignant lymphoma: a population-based case-control study in Germany" pptx

Danh mục: Hóa học - Dầu khí

... of cases and control subjects The characteristics of the cases with lymphoma and control subjects are given in table The mean age of cases with any lymphoma (n = 710) is 56.1 ± 16.3 years; of cases ... a Canadian case- control study, including 517 cases and 1,506 control subjects [26] In a more recent study among nearly 5,000 Finnish laboratory workers seven NHL cases and three HL cases were ... "undiluted" reference group In our case- control study, 17% of cases as well as control subjects were ever exposed to benzene Neither the comparison of ever versus never exposed (results not shown)...

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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

Danh mục: Hóa học - Dầu khí

... 595 population controls, 328 agreed to participate (55%) Non-participation was higher among younger control subjects and among control subjects with non-German nationality One control subject ... months after inclusion in the study as a control subject This subject was excluded from the control group (but included in the case group), leaving 327 control subjects A detailed computer-assisted ... 80% for exposure to kneeling, we planned to include about 330 cases and control subjects With the actually attained 295 cases and 327 control subjects, an odds ratio of 2.0 for kneeling or similar...

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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

Danh mục: Hóa học - Dầu khí

... http://www.ovarianresearch.com/content/3/1/25 Page of Table General anthropometric in PCOS and control women Table Sex hormone levels in control women and in patients with PCOS PCOS Control N = 24 N = 12 P-value PCOS Age (years) 22.87 ... has been performed in PCOS subjects and control women Table Metabolic and cardiovascular risk parameters in control women and in women with PCOS PCOS Control N = 24 N = 12 86.29 ± 9.90 82.08 ... (mg/dl) 44,05 ± 2,27 a Table Ovarian ultrasound measurements in PCOS and control women 4.54 ± 2.77 1.82 ± 1.17 P =

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