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A systematic review of the quality of genetic association studies in human sepsis

Lookup NU author(s): Dr Simon Baudouin

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Abstract

Objective: Epidemiological studies demonstrate that inherited factors play a major role in the development and prognosis of sepsis. However, genetic association studies in sepsis have produced contradictory evidence of an effect from individual polymorphisms. Major methodological flaws have been reported in a number of genetic association studies in non-septic populations, relating to problems with experimental design, statistical analysis, study size, power and replication. We hypothesised that genetic association studies investigating sepsis suffer from similar problems, and that this explains the lack of consistent evidence for an effect from polymorphisms. Design: A systematic review was conducted of published genetic association studies in sepsis from 1996-2005 using a newly devised scoring system for study quality and rigour. A Bayesian statistical analysis was also carried out to assess the false-positive report probability of identified studies. Measurements and results: Study quality was assessed using a 10-point scoring system designed from published reporting guidelines. The majority of studies were of low to intermediate quality, with deficiencies in control group selection, genetic assay technique, study blinding, statistical interpretation, study replication, study size and power. Bayesian analysis indicated that many of the studies reporting a positive association between a genetic polymorphism and sepsis were likely to represent false-positive associations. Conclusions: The quality and size of genetic association studies in septic patients needs to improve if advances in identifying genetic effects in sepsis are to occur. Investigators should, as a minimum, follow recommended guidelines when designing studies. © 2006 Springer-Verlag.


Publication metadata

Author(s): Clark MF, Baudouin SV

Publication type: Review

Publication status: Published

Journal: Intensive Care Medicine

Year: 2006

Volume: 32

Issue: 11

Pages: 1706-1712

ISSN (print): 0342-4642

ISSN (electronic): 1432-1238

URL: http://dx.doi.org/10.1007/s00134-006-0327-y

DOI: 10.1007/s00134-006-0327-y


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