Due to mainly study-design limitations most eQTL analyses focus on gene expression measured in a single tissue type [ 9, 13- 18], posing limitations when attempting to study more inaccessible tissues, such as the brain.
Dr. Lin's contribution is mainly in study design, pathology reporting, and paper amendment.
However, these outcomes were not frequently reported, and the additional evidence was mainly from study designs that would not have met the inclusion criteria for this review.
Mainly, aspects of study design and methodological validity were assessed using 15 criteria and scored as 'yes,'nonor'unclearclear' based on the information provided in the study manuscript (Table 2).
The present study has several limitations related mainly to the study design.
Other limitations include the fact that in most of the efficacy trials blinding of assessment was not possible mainly because the study design.
The score for the studies included in the review fluctuated between 0.62 (fair) and 0.77 (good); none achieved a perfect score, mainly because of study design, measurement bias, or confidence intervals not being reported.
However, we did not perform multivariable analysis for mortality-related factors, mainly because the study design was focused on persistence of bacteremia, and also the matching was carried out in that context.
These have estimated the prevalence of BRCA1 and BRCA2 mutations in such high-risk families from 20 to 67% ((Shih et al, 2000; Fackenthal and Olopade, 2007; Palma et al, 2008), and numerous others), where variation is mainly due to study design and population genetic pool, that is founder populations tend to present higher frequencies.
The current evidence rating for hyperbaric oxygen therapy indications uses the American Heart Association system, which mainly depends on the study design.
Although one could speculate that DBS is ineffective in chronic CH, several bias, mainly related to the study design, might explain that efficacy of DBS has not been demonstrated in the randomized phase.
