Minimal access surgery compared with medical management for chronic gastro-oesophageal reflux disease: UK collaborative randomised trial.

BMJ · 2008 · PMC2603580 · PMID 19074946

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highly significantno p-value reported

There were highly significant differences between the randomised groups in the REFLUX scores three months after surgery (a half to a third of 1 SD) favouring surgery, and these were broadly sustained nine months later.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.