It is noted, however, that there is a positive trend among the non-smokers with a P -value for the trend slightly smaller than 0.05.
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Coffee intake and oral-oesophageal cancer: follow-up of 389,624 Norwegian men and women 40-45 years.
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The sentences
None of these consistently supported an inverse association, but Stensvold and Jacobsen (1994) reported a borderline significant inverse association with cancer of the buccal cavity and pharynx in men.