The potential and limitations of meta-analysis.

@article{Spector1991ThePA,
  title={The potential and limitations of meta-analysis.},
  author={Tim D. Spector and Simon Giles Thompson},
  journal={Journal of epidemiology and community health},
  year={1991},
  volume={45 2},
  pages={89-92}
}
s never appear as full publications.29 Chalmers and coworkers attempted to identify factors which determined subsequent full publication of clinical trial abstracts in the perinatal field.38 They were unable to detect any differences in methodological quality, but did find that sample size was a significant factor in determining publication. The effect of sample size has also been shown by others.29 However although small studies are more likely to remain unpublished, those with large effects… CONTINUE READING

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A meta - analysis of the association between the oral contraceptive pill and the development of rheumatoid arthritis

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An assessment of publication bias using a sample of published clinical trials

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