Banks H A, Stollery B T
Department of Occupational Health, Manchester University, U.K.
Sci Total Environ. 1988 Jun 1;71(3):469-76. doi: 10.1016/0048-9697(88)90220-3.
Four times during the course of a year, asymptomatic lead workers from the printing industry underwent a series of psychological tests assessing memory, attention, verbal-reasoning and spatial skills. In a syntactic reasoning task, the exposed group were less accurate, tended to be slower on the more complex problems and showed less consistent improvement over the year. An examination of subjects with changing blood-lead levels during the year showed that, within the exposed group, those with rising blood-lead levels were less accurate than those whose blood-leads fell or remained constant. This may indicate that effects of changing blood-lead concentrations depend upon overall level of exposure.
一年中，来自印刷行业的无症状铅接触工人接受了四次系列心理测试，以评估记忆力、注意力、语言推理和空间技能。在一项句法推理任务中，接触组的准确性较低，在处理更复杂问题时往往较慢，并且在这一年中进步不太稳定。对一年内血铅水平变化的受试者进行检查发现，在接触组中，血铅水平上升的受试者比血铅水平下降或保持不变的受试者准确性更低。这可能表明血铅浓度变化的影响取决于总体接触水平。
