disadvantages of nested case control study
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 ... 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 ... 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....
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Associated factors for treatment delay in pulmonary tuberculosis in HIV-infected individuals: a nested case-control study docx
Ngày tải lên :
06/03/2014, 04:20
... cohort of 2365 HIV-infected individuals, 629
initiated treatment for TB during the period of study. Of
these, 274 had the pulmonary form of the disease and
constituted the study population. Of these, ... identify the factors associated with this delay.
Methods
Study design and population
A nested case- control study was undertaken within a
cohort of HIV-infected individuals , aged 18 years and
over, ... 69.4% of patients were male.
The time interval between the onset of cough and the
initiation of treatment for TB ranged from a minimum
of 1 day to a maximum of 552 days, with a median of 41
days...
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Báo cáo khoa học: "Breast cancer risk factors in Turkish women – a University Hospital based nested case control study" pps
Ngày tải lên :
09/08/2014, 04:21
... acquisition of data, helped in design of the
study. NC participated drafting of the manuscript, editing
of final version. RD performed the statistical analysis. TO
helped to acquisition of data. ... Beral V: Risk of
breast cancer after miscarriage or induced abortion: a Scot-
tish record linkage case- control study. J Epidemiol Community
Health 2005, 59:283-287.
World Journal of Surgical Oncology ... 1 of 8
(page number not for citation purposes)
World Journal of Surgical Oncology
Open Access
Research
Breast cancer risk factors in Turkish women – a University Hospital
based nested case control...
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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"
Ngày tải lên :
26/10/2012, 09:48
... con-
sistent pattern of the effect of smoking on risk of can-
cer deaths.
TABLE 1. Characteristics of cases and two control groups:
Population-based case- control study of smoking on risk of
cancer deaths ... offer specific suggestions that we
believe are useful in choosing controls within the
framework of the study principles.
SUBJECTS AND METHODS
National Mortality Survey and Case- Control
Study ... conducted as the study base.
Cases and two groups of controls were obtained
within the study base: 130,079 males who died of
smoking-related cancers at age 35 or over were de-
fined as cases. These...
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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 posi-
tive 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
... 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 ... tertile of exposed control subjects comprised more
than 10% of all (exposed plus non-exposed) control sub-
jects, a high-dose category was generated according to the
95
th
percentile of control...
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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
... 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 ... the
subjective HRQoL of children with SCD.
While interpreting the results of this study, s trengths
and limitations should be taken into account. Findings
of this study are strengthened by the use of a well-stan-
dardized...
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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 ... 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 ... Number of units Cost manual of Oostenbrink 81.00
Fresh frozen plasma Number of units Cost manual of Oostenbrink 154.00
Endoscopy Number of procedures Tariff list hospitals 369.71
Surgery:
Suture of...
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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 qual-
ity of life were p articularly effective on anxiety. ... given
are effective in reducing the level of anxiety [14-16].
Ozdemir and Pasinlioglu (2009) found in their study on
34 study group cases and 32 control group cases under-
going hysterectomy with...
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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
... 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 ... included in the formulary of reimbursed medications.
A population-based case control study was conducted in
which the prevalence of risk factors and the medical histories of
patients prescribed ... employee of Pharmacia Corpo-
ration at the time the study was conducted.
Authors' contributions
YM, as principal investigator of the study, designed and
coordinated the study, interpreted study...
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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. ... cases (10.5%) and controls (10.4%)
for this PTPN22 variant (P = 0.96).
A total of 207 PsA patients and 199 control individuals were
genotyped in the Toronto population for the R620W variant of
PTPN22....
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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, ... combinations
The frequencies of the PADI4 haplotype combinations found
in our study are presented in Table 1. A detailed description of
the variability of exons 2–4 of the PADI4 gene in healthy...
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