Groenewald G, Langenhoven M L, Beyers M J, du Plessis J P, Ferreira J J, van Rensburg S J
S Afr Med J. 1981 Dec 19;60(25):964-7.
The frequency of low nutrient intakes was investigated in areas of moderate and high oesophageal cancer incidence in Transkei by means of 24-hour recall and habitual intake studies in children and nursing mothers. The results in moderate- and high-risk regions were similar and habitual intakes of protein, energy, phosphorus, iron, thiamine and vitamin A were generally satisfactory. Intakes of less than two-thirds the Recommended Dietary Allowances (RDA) had a high frequency of inadequate intakes for calcium (90%), nicotinic acid (79%), riboflavin (55%) and ascorbic acid (50%). It is concluded that the possibility of long-standing deficiencies of the latter three vitamins playing a role in oesophageal carcinogenesis should be considered.
通过对特兰斯凯食管癌发病率中等和较高地区的儿童及哺乳期母亲进行24小时膳食回顾和习惯性摄入量研究，调查了低营养素摄入量的频率。中高风险地区的结果相似，蛋白质、能量、磷、铁、硫胺素和维生素A的习惯性摄入量总体上令人满意。摄入量低于推荐膳食摄入量（RDA）三分之二的情况中，钙（90%）、烟酸（79%）、核黄素（55%）和抗坏血酸（50%）摄入不足的频率较高。得出的结论是，应考虑后三种维生素长期缺乏在食管癌发生过程中发挥作用的可能性。
