Personal hygiene risk factors for contact lens-related microbial keratitis.

BMJ Open Ophthalmol · 2020 · PMC7481083 · PMID 32953996

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did not reach statistical significanceno p-value reported

1–3 Although monthly disposable lenses also increase the risk of infection, this did not reach statistical significance.

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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.