Tattoo-to-Tooth Ratio
From Gomerpedia
One of the most useful ratios in medicine, the tattoo-to-tooth ratio (or Ta/To ratio) is useful in predicting poor intelligence, where a score of zero indicates high intelligence and a score of infinity indicates neverending stupidity.[1]
Is the Ratio Applicable to All Patients
Unfortunately, the Ta/To ratio is invalid in patients over the age of 60 because of the confounding variable known as dentures.
References