Smoking, alcohol, sleep and risk of idiopathic sudden deafness: a case-control study using pooled controls.

Participants who were habitual drinkers but consumed less than two units per day appeared to be about one-and-a-half times (OR=1.40, 95% CI=0.89-2.20 for Controls I , and OR=1.42, 95% CI=0.91-2.22 for Controls II ) as likely as non-drinkers to have been cases, and although this increased risk was not statistically significant, it contributed to modest evidence of a positive trend in risk of sudden deafness across alcohol intake categories (p-values for trend =0.02 for Controls I , and 0.05 for Controls II ).

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