Walker A R, Walker B F, Isaacson C, Segal I, Pryor S
S Afr Med J. 1984 Dec 8;66(23):877-8.
South African urban Blacks are very prone to oesophageal cancer, and mean age at diagnosis is almost a decade lower than that of White patients (male preponderance is equally marked in both ethnic groups). In recent years the socio-economic position of urban Blacks has improved greatly, with considerable strides being made in literacy and awareness of hospital services. This socio-economic improvement could conceivably improve the extremely short durations of survival among oesophageal cancer patients noted in earlier studies; this, however, has not occurred. Of a series comprising 146 male and 37 female patients, 50% had died after 3,6 and 4,2 months respectively. The corresponding periods noted for White patients are about twice as long.
南非城市黑人极易患食管癌，确诊时的平均年龄比白人患者低近十岁（两个种族的男性患病率均同样显著）。近年来，城市黑人的社会经济地位有了很大改善，在识字率和对医院服务的认知方面取得了长足进步。可以想象，这种社会经济状况的改善可能会延长早期研究中所指出的食管癌患者极短的生存期；然而，实际情况并非如此。在一组由146名男性和37名女性患者组成的病例中，分别有50%的患者在3.6个月和4.2个月后死亡。白人患者的相应生存期约为其两倍。
