Elwood P, Toothill C
J Epidemiol Community Health. 1986 Jun;40(2):178-80. doi: 10.1136/jech.40.2.178.
Random samples of residents in North Wales, some of whom had been seen in 1976 and others in 1981, were seen again in 1984. Blood lead estimations indicated that there had been a fall of about 5% per year. This is similar to the fall we estimated from two previous studies in Wales and is comparable to changes described in the USA and New Zealand.
对北威尔士居民进行了随机抽样,其中一些人在1976年接受过检查,另一些人在1981年接受过检查,1984年再次对他们进行了检查。血铅检测结果表明,血铅水平每年下降约5%。这与我们根据之前在威尔士进行的两项研究估计的下降幅度相似,并且与美国和新西兰所描述的变化相当。