How important are comprehensive literature searches and the assessment of trial quality in systematic reviews? Empirical study.

@article{Egger2003HowIA,
  title={How important are comprehensive literature searches and the assessment of trial quality in systematic reviews? Empirical study.},
  author={Matthias Egger and Peter Juni and C. Bartlett and F Holenstein and Jonathan A. C. Sterne},
  journal={Health technology assessment},
  year={2003},
  volume={7 1},
  pages={
          1-76
        }
}
The Empirical Evidence of Bias in Trials Measuring Treatment Differences
TLDR
The Agency for Healthcare Research and Quality, through its Evidence-based Practice Centers (EPCs), sponsors the development of evidence reports and technology assessments to assist public-and private-sector organizations in their efforts to improve the quality of health care in the United States.
Challenges in Systematic Reviews of Therapeutic Devices and Procedures
TLDR
This article highlights 3 challenges that may arise in conducting and interpreting any systematic review that evaluates the efficacy or effectiveness of therapeutic devices or surgery, and reviews the empirical evidence relevant to these methodologic issues in general.
Methodological steps used by authors of systematic reviews and meta-analyses of clinical trials: a cross-sectional study
TLDR
The experience of the authors in SR/MAs is highly correlated with use of the recommended tips forSR/MA conduct, and the optimal methodological approach for researchers conducting a SR/MA should be standardized.
Defining the process to literature searching in systematic reviews: a literature review of guidance and supporting studies
TLDR
If a shared model of the literature searching process can be detected across systematic review guidance documents and, if so, how this process is reported in the guidance and supported by published studies is determined.
Influence of blinding on treatment effect size estimate in randomized controlled trials of oral health interventions
TLDR
The extent of bias associated with blinding in randomized controlled trials of oral health interventions was quantified using a two-level meta-meta-analytic approach with a random effects model to allow for intra- and inter- meta-analysis heterogeneity.
A systematic review of the survival and complication rates of resin‐bonded fixed dental prostheses after a mean observation period of at least 5 years
TLDR
Despite the high survival rate of RBBs after 5 and 10 years, technical complications like de-bonding and minor chipping were frequent, andRBBs with zirconia framework and R BBs with one retainer tooth showed the highest survival rate.
Prognostic factors of complaints of arm, neck, and/or shoulder: a systematic review of prospective cohort studies
TLDR
Strong evidence for no prognostic impact of many factors that are suggested to be associated with recovery according to the primary studies is revealed.
An assessment of the efficacy of searching in biomedical databases beyond MEDLINE in identifying studies for a systematic review on ward closures as an infection control intervention to control outbreaks
TLDR
The value of results found from searching beyond MEDLINE, Embase, and CINAHL with accuracy was not determined, however, hand searching for serendipitous retrieval remains an important aspect due to indexing and keyword challenges inherent in this literature.
Influence of Reported Study Design Characteristics on Intervention Effect Estimates From Randomized, Controlled Trials
TLDR
For each characteristic, average bias and increases in between-trial heterogeneity were driven primarily by trials with subjective outcomes, with little evidence of bias in trials with objective and mortality outcomes.
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References

SHOWING 1-10 OF 238 REFERENCES
Hospitalisation for bed rest in multiple pregnancy
  • (Cochrane Review). In: The Cochrane Library. Issue 1. Oxford: Update Software;
  • 1998
Somatostatin/octreotide in acute bleeding varices (Cochrane Review)
  • The Cochrane Library. Issue 1. Oxford: Update Software;
  • 1998
Treating trichomoniasis in pregnancy (Cochrane Review)
  • The Cochrane Library. Issue 1. Oxford: Update Software;
  • 1998
Folate supplementation in pregnancy.
  • K. Mahomed
  • Medicine
    The Cochrane database of systematic reviews
  • 2000
TLDR
Folate supplementation during pregnancy appears to improve haemoglobin levels and folate status, and there is not enough evidence to evaluate whether folate supplementation has any effect, beneficial or harmful, on clinical outcomes for mother and baby.
Zinc supplementation in pregnancy.
  • K. Mahomed
  • Medicine
    The Cochrane database of systematic reviews
  • 2000
TLDR
Apart from possible reduction in induction of labour, caesarean section and preterm delivery in the supplemented group, no other differences were detected between groups of women who had zinc supplementation and those who had either placebo or no zinc during pregnancy.
Alternative versus conventional delivery settings (Cochrane Review)
  • The Cochrane Library. Issue 1. Oxford: Update Software;
  • 1998
Amnioinfusion for cord compression (Cochrane Review)
  • The Cochrane Library. Issue 1. Oxford: Update Software;
  • 1998
Amnioinfusion for meconium liquor in labour (Cochrane Review)
  • The Cochrane Library. Issue 1. Oxford: Update Software;
  • 1998
Antibiotic prophylaxis in ICU (Cochrane Review)
  • The Cochrane Library. Issue 1. Oxford: Update Software;
  • 1998
Chambers/nebulisers – acute asthma (Cochrane Review)
  • The Cochrane Library. Issue 1. Oxford: Update Software;
  • 1998
...
1
2
3
4
5
...