Bradshaw E, Harington J S
S Afr Med J. 1982 Jun 19;61(25):943-6.
Standardized mortality rates for eight major types of cancer (as well as for all types of cancer considered together) in four South African population groups are compared with each other and with rates in selected countries. Wide differences among the races in South Africa are displayed, and several rates are shown to parallel those in other population groups abroad. This lends support to the belief that socio-economic factors (rather than solely genetic factors) play the major role in cancer causation.
对南非四个群体中八种主要癌症类型（以及所有类型癌症综合起来）的标准化死亡率进行了相互比较，并与选定国家的死亡率进行了比较。南非不同种族之间存在巨大差异，而且一些死亡率与国外其他群体的死亡率相似。这支持了一种观点，即社会经济因素（而非仅仅是遗传因素）在癌症成因中起主要作用。
