One report showed that even mild deficiency can cause a significant loss of learning ability – about 13.5 intelligence quotient points, at population level.
Neurotoxicity effects were estimated from a linear dose-response function with a slope of 0.465 Intelligence Quotient (IQ) point reduction per μg/g increase in the maternal hair-Hg concentration during pregnancy, assuming no deficits below a hair-Hg limit of 0.58 μg/g thought to be safe.
All test results were transferred into intelligence quotient (IQ) points according to age-related scales (100 IQ points reflect normal intelligence compared with the general population).
Less severe deficiencies in both adults and children can mean the loss of 10 to 15 intelligence quotient (IQ) points, as well as impaired physical coordination and lethargy.
Less severe iodine deficiencies in children and adults can mean a loss of 10 intelligence quotient (IQ) points and can impair physical coordination.
To eliminate the effect of the excitation source, these values are normalized to a particular mode—Table 1 contains the results for normalization with respect to and —by taking the point-by-point quotient of the respective moduli at every frequency.
Gender differences were significant in fundamental frequency, absolute jitter, relative jitter, jitter period perturbation quotient, shimmer five-point amplitude perturbation quotient, and harmonics-to-noise ratio.
The sum, difference, and product of continuous functions with the same domain are also continuous, as is the quotient, except at points at which the denominator is zero.
Even Kevin Federline could increase his hip quotient by thirty points (we know, just a drop in the bucket) if we saw him with one of these.
At study conclusion, the GAME group (n = 6) demonstrated an advantage in Total Motor Quotient of 8.05 points on the Peabody Developmental Motor Scale-2 (PDMS-2) compared to the standard care group (n = 7) (p < .001).001
Take the example in my commentary (Weiss 2012), modeled on numerous publications in the lead literature (e.g., Lanphear et al. 2005): If developmental exposure to low levels of lead reduces a population IQ (intelligence quotient) by 3 points (3%), from, say, 100 to 97, it is taken as evidence of a major adverse effect.
