Fig. 1: Associations between hair lead (Pb) levels and psychological variables.
From: Lead exposure is associated with functional and microstructural changes in the healthy human brain
Partial residual plots with trend lines depicting the associations between the residuals of psychological variables and those of the logarithms of hair lead levels with other confounding factors controlled. Greater hair lead levels (log values) were significantly associated with a higher novelty seeking scores (N = 919), b greater extraversion (N = 920), c lower cognitive reflexibility–impulsivity scores (i.e., higher impulsivity) (N = 918), d lower performance on the complex arithmetic task (N = 661), e lower total intelligence scores on the Tanaka B-type intelligence test (TBIT) (N = 843), and f lower reading comprehension test scores (N = 837).
