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Comment
. 2008 Feb;15(2):395-6.
doi: 10.1245/s10434-007-9657-4. Epub 2007 Dec 11.

Secondary analyses of large population-based data sets: issues of quality, standards, and understanding

Affiliations
Comment

Secondary analyses of large population-based data sets: issues of quality, standards, and understanding

Clifford Y Ko et al. Ann Surg Oncol. 2008 Feb.
No abstract available

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Comment on

References

    1. Nathan H, Pawlik TM. Limitations of claims and registry data in surgical oncology research. Ann Surg Oncol 2007. doi:10.1245/s10434-007-9658-3 - PubMed
    1. {'text': '', 'ref_index': 1, 'ids': [{'type': 'PubMed', 'value': '11304107', 'is_inner': True, 'url': 'https://pubmed.ncbi.nlm.nih.gov/11304107/'}]}
    2. Altman D, Schulz KF, Moher D, et al. for the CONSORT Group. The revised CONSORT statement for reporting randomized trials: explanation and elaboration. Ann Intern Med 2001;134(8):663–94 - PubMed
    1. {'text': '', 'ref_index': 1, 'ids': [{'type': 'DOI', 'value': '10.1056/NEJM200006223422507', 'is_inner': False, 'url': 'https://doi.org/10.1056/nejm200006223422507'}, {'type': 'PMC', 'value': 'PMC1557642', 'is_inner': False, 'url': 'https://pmc.ncbi.nlm.nih.gov/articles/PMC1557642/'}, {'type': 'PubMed', 'value': '10861325', 'is_inner': True, 'url': 'https://pubmed.ncbi.nlm.nih.gov/10861325/'}]}
    2. Concato J, Shah N, Horwitz RI. Randomized, controlled trials, observational studies, and the hierarchy of research designs. N Engl J Med 2000;342(25):1887–92 - PMC - PubMed
    1. {'text': '', 'ref_index': 1, 'ids': [{'type': 'DOI', 'value': '10.1056/NEJM200006223422506', 'is_inner': False, 'url': 'https://doi.org/10.1056/nejm200006223422506'}, {'type': 'PubMed', 'value': '10861324', 'is_inner': True, 'url': 'https://pubmed.ncbi.nlm.nih.gov/10861324/'}]}
    2. Benson J, Hartz AJ. A comparison of observational studies and randomized, controlled trials. N Engl J Med 2000;342(25):1878–86 - PubMed