Robertson M A, Harington J S, Bradshaw E
Br J Cancer. 1971 Sep;25(3):395-402. doi: 10.1038/bjc.1971.50.
The incidence of cancer among the African workers on the gold mines of South Africa has been studied for the period 1964-68. Considering the degree of selection to which they are subjected, the crude cancer rate was unexpectedly high.The most common cancers were those of the liver, the oesophagus, the respiratory system and the bladder. Geographical and tribal analysis showed that both liver and bladder cancers were predominantly found in Africans from Mozambique, while most of the oesophageal cancer occurred in Xhosas from the Transkei. The highest rate for cancer of the respiratory system was found in Africans from Natal, predominantly Zulu.The findings of this survey confirm those of previous South African surveys. The differences in cancer incidence are linked to both geographical area (physical environment), and to tribe, which may mean an association with tribal habit and custom. These factors need further investigation.
1964年至1968年期间，对南非金矿的非洲工人中的癌症发病率进行了研究。考虑到他们所面临的选择程度，粗癌症发病率出乎意料地高。最常见的癌症是肝癌、食道癌、呼吸系统癌和膀胱癌。地理和部落分析表明，肝癌和膀胱癌主要发生在来自莫桑比克的非洲人身上，而大多数食道癌发生在特兰斯凯的科萨人身上。呼吸系统癌症发病率最高的是来自纳塔尔的非洲人，主要是祖鲁人。本次调查结果证实了此前南非调查的结果。癌症发病率的差异与地理区域（自然环境）和部落都有关联，这可能意味着与部落习惯和风俗有关。这些因素需要进一步调查。
