Waist circumference correlates significantly with systemic inflammatory response. In virtually every organism analyzed, methylation in promoter regions correlates negatively with gene expression. There is no evident racial predisposition that correlates to malnutrition. Studies have shown that high satisfaction correlates to increased learning. Research on neural correlates of consciousness is yet inconclusive on this issue. Amygdala activity at the time of encoding information correlates with retention for that information. These postulated events are referred to as "neural correlates of consciousness" or NCCs. It correlates 0.91 with comprehension as measured by reading tests. How does caries progression correlates with this? After treatment, higher BMI also correlates to higher risk of recurrence. Age discrimination also directly correlates to suicide, on top of influencing poverty rates. Conscientiousness significantly correlates positively with right-wing authoritarianism. A decrease in energy usage directly correlates to cost efficiency. This usually correlates well with perceived sweetness. Moreover, the number of proteins the genome encodes correlates well with the organism complexity.