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对７８名铅接触工人（平均血铅浓度为２．１４μｍｏｌ／Ｌ）和７６名对照工人（平均血铅浓度为０．２０μｍｏｌ／Ｌ）的ＷＨＯ／ＮＣＴＢ６项测试结果，用判别分析法研究发现：用逐步判别法建立的由ＳＲＴ、ＢＶＲ、ＰＡ３项测试组成的判别函数与用直接判别法建立的由６项测试组成的判别函数的回判效果相似。提示：在血铅为２．１４μｍｏｌ／Ｌ时，ＷＨＯ／ＮＣＴＢ的６项分测验中的ＳＲＴ、ＢＶＲ、ＰＡ是检测铅接触工人神经行为功能的关键测验项目。多元协方差分析显示：接触组工人的ＷＨＯ／ＮＣＴＢ中的６项分测验，除ＳＲＴ测验外，其余与对照工人比较均无显著性差异。提示：在血铅为２．１４μｍｏｌ／Ｌ时，铅接触工人的反应速度可能受影响。
The results of WHO / NCTB6 tests on 78 lead exposed workers (average blood lead concentration 2.14 μmol / L) and 76 control workers (mean blood lead concentration 0.20 μmol / L) The discriminant function composed of the SRT, BVR, PA3 tests established by the stepwise discriminant method is similar to the discriminant function composed of the six tests established by the direct discriminant method. It is suggested that SRT, BVR and PA in 6 sub-tests of WHO / NCTB are the key test items for testing the neurobehavioral function of lead-exposed workers at a blood lead of 2.14 μmol / L. Multivariate covariance analysis showed that there were no significant differences in the 6 sub-tests in the WHO / NCTB workers in the exposure group compared with the control workers except for the SRT test. Hint: When blood lead is 2.14 μmol / L, the reaction rate of lead exposed workers may be affected.