Conversely, nitrotyrosine was undetectable in the cerebral cortex of age-matched control brains.

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The initial studies showing that secondhand smoke is dangerous compared nonsmoking spouses of smokers with age-matched nonsmoking controls who were married to nonsmokers.

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Dr Phillips and his colleagues compared 58 diabetic children with 172 non-diabetic ones matched for age, sex, social class and pediatrician.

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Take 50 supposedly abnormal films and shuffle them with 50 taken from people never exposed to asbestos but matched in sex, age and smoking habits.

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They worked out the ratio of the length of the index finger to the length of the ring finger for each child, and compared it with those of 34 of the children's healthy siblings, 88 of their fathers, 88 of their mothers, and a number of unrelated controls that were matched for sex and age.

ECONOMIST: Autism

They outperformed 10 typical healthy older folk (average age 83) on a test that involved recalling lists of words, and they matched the performance of 14 healthy middle-aged volunteers (average age 58).

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Our wrestlers are used to wrestling a wide range of weights and ages of, but the Breton system categorises age and weight to ensure that all bouts are well matched.

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He had travelled a long way to have a walkover, so the organisers matched him with a Breton competitor from an older age group.

BBC: Cumberland wrestling round-up