نتایج جستجو برای: cohort series
تعداد نتایج: 563776 فیلتر نتایج به سال:
The relation between occupational factors and pancreatic cancer has been studied by two different approaches: a population based case-control study with two series of controls and a retrospective cohort study based on register data. With both approaches, some support was found for an association with occupational exposure to petroleum products. Associations were also indicated with exposure to ...
in this paper, we propose a new residual analysis method using fourier series transform into fuzzy time series model for improving the forecasting performance. this hybrid model takes advantage of the high predictable power of fuzzy time series model and fourier series transform to fit the estimated residuals into frequency spectra, select the low-frequency terms, filter out high-frequency term...
the aim of this thesis is an approach for assessing insurer’s solvency for iranian insurance companies. we use of economic data with both time series and cross-sectional variation, thus by using the panel data model will survey the insurer solvency.
تاکنون مطالعات و تحقیقاتی مقطعی در زمینه پوسیدگی دندانی در افراد دیابتیک و سالم انجام شده در مورد میزان پوسیدگی دندان درافراد دیابتیک و سالم بین محققین این رشته اختلاف عقیده و نظر وجود دارد. بنابراین با وجود این اختلافات عقیده در زمینه رابطه دیابت و پوسیدگی و یا به عبارت دیگر رابطه دیابت با شاخص dmfدر سال 1380پژوهشی با هدف بررسی رابطه دیابت کنترل شده و شاخصdmfدر بیماران دیابتیک تحت پوشش...
چکیده ندارد.
1 to label key recommendations in clinical review articles. In general, only key recommendations are given a Strength-of-Recommendation grade. Grades are assigned on the basis of the quality and consistency of available evidence. Table 1 shows the three grades recognized. As the table indicates, the strength-of-recommendation grade depends on the quality and consistency of the evidence for the ...
Background & Objectives: The case-cohort study is one of the youngest designs in epidemiology and some methodological aspects of it are still in debate. This study aimed at comparing the estimated hazard ratio, standard error, and interaction hazard ratio between the case-cohort and cohort studies for assessing the relationship between diabetes and cardiovascular diseases.Methods: A total of 17...
BACKGROUND It is well known that dialysis patients with diabetic nephropathy have a poor prognosis, but data concerning the survival of dialysis patients with diabetes plus a non-diabetic primary nephropathy or the survival of patients who develop diabetes after the start of regular dialysis are scarce. AIM AND METHODS We reviewed the survival of two cohorts of dialysis patients in whom diabe...
Objective To give an overview of the recently reported literature on aetiologies meningitis and encephalitis in western sub-Saharan Africa. Methods We conducted a scoping review following PRISMA guidance published cases 16 countries United Nations-defined African region as identified cohort studies, case series, reports, 01/01/2000–08/01/2020, available four databases August 2020 with abstract ...
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