Reanalysis of Gulf war vaccination data does not contradict findings

doi:10.1136/bmj.321.7263.761

BMJ 2000;321:761 ( 23 September )

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Reanalysis of Gulf war vaccination data does not contradict findings

The first 150 words of the full text of this article appear below.

EDITOR $---$ Professors Graham Dunn and Brian Everitt have pointed out to us in a personal communication that a different statisticalmethod would have been more appropriate in our paper on the effectsof multiple vaccines on the health of Gulf war veterans.¹ Inthat paper we assessed the effect of multiple vaccines receivedeither before or during deployment to the Gulf as two separateexposures. We found that vaccines received before deployment werenot associated with most of the outcome measures we looked at,whereas vaccines received during deployment were. We performedthe analysis in this way as we were testing a specific a priorihypothesis based on a theory put forward by Rook and Zumla.²However, we did not directly compare these twoexposures.

We have performed a series of further analyses in which we entered the two separate exposures (vaccines received before deploymentand vaccines received during . . . [Full text of this article]

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Role of vaccinations as risk factors for ill health in veterans of the Gulf war: cross sectional study: Matthew Hotopf, Anthony David, Lisa Hull, Khalida Ismail, Catherine Unwin, and Simon Wessely
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