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Results: Overall, 36 case- control studies were chosen based on the search criteria.
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Population stratification is an important issue in case- control studies of disease-marker association.
3
These changes were normalized in the control studies obtained in four patients.
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Results: Eleven cohort and two case- control studies were included in this review.
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The types of studies included were: clinical trials, cohort and case- control studies.
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Results: Reproducibility and lack of analytical bias was confirmed in quality- control studies.
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The methods are those classically used in the analysis of case- control studies.
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This difference was observed in case- control studies and not in cohort studies.
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The BPC3 includes nested case- control studies within large North-American and European cohorts.
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Results: A total of 39 case- control studies were included in this meta-analysis.
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Evidence synthesis: Seventeen case- control studies and 5 cases prognosis were included.
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We studied NACP-Rep1 polymorphism in two independent case control studies in our population.
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Several historical control studies supported the beneficial effect of postoperative radiochemotherapy.
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Pooled analysis of data from 2 previously reported large case- control studies was used.
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This paper shows the research rationale and design for these three case- control studies.
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But comparisons between regions were difficult due to a lack of control studies.