Exposure-response relationship between recent postnatal MeHg exposure and ABR absolute wave latencies (upper graphs) and interwave latencies (lower graphs) for males (left column) and females (right column) at 80 dBnHL. Each * symbol indicates a linear fit with a slope significantly different from zero. As the recent postnatal MeHg exposure level increases, the absolute wave I latency for both males and females decreases (slopes for 69, 39, and 19/sec are -0.0033, -0.0031, -0.0029, and p=0.002, 0.001, 0.002, respectively *** shows that all wave I slopes are significant at each repetition rate). As the recent postnatal MeHg level increases, the interwave wave I-V latencies increase for males subjects only (slope of 0.0045, p=0.025). The association is estimated in a regression analysis that is adjusted for prenatal Hg exposure and hearing loss. The rug plot above the x axis represents the number of subjects at each exposure level.