More recent work involving a re-examination of previous findings and newer results from a study of 73
Yu-Cheng children demonstrated that relative to neighborhood, matched controls, they have a) a persistent delay in growth (specifically, height, total lean mass and soft tissue mass), b) increased behavioral problems at 3–9 years of age, and c) reduced penile length in boys aged 11–14 years (Guo et al. 1995). In addition, children born during 1985–1991 to Yu-Cheng mothers had developmental delays that were associated with maternal exposure to PCBs and CDFs. Chao et al. (1997) also demonstrated that the prevalence of middle ear disease was higher in children exposed to PCBs and CDFs than in their matched controls.