Segal I, Paterson A, Walker A R
J Clin Gastroenterol. 1986 Oct;8(5):530-3. doi: 10.1097/00004836-198610000-00007.
In black patients seen at Baragwanath Hospital, Johannesburg, appendicitis occurs most frequently in the 10-19-year-old age group. There is a pronounced male bias. Parasitic ova in the appendix are very seldom observed (3.6%). Fecaliths, present in 20% of diseased appendices, are noted far less frequently than are reported for white patients (50%-75%). There are about two cases of appendicitis per 1,000 admissions of adults annually, a low frequency consistent with the tenfold differential of appendectomies reported to prevail in urban black and white adolescents. The progressively changing diet of urban blacks, currently low in fat and in dietary fiber, has not yet become associated with a marked increase in the occurrence of the disease (nor of most other noninfective bowel diseases).
在约翰内斯堡巴拉格瓦纳特医院就诊的黑人患者中，阑尾炎最常发生在10至19岁年龄组。男性患病率明显偏高。阑尾中很少观察到寄生虫卵（3.6%）。粪石在20%的患病阑尾中存在，其出现频率远低于白人患者的报告频率（50%-75%）。每年每1000名成人入院患者中约有两例阑尾炎病例，这一低发病率与城市黑人和白人青少年阑尾切除率相差十倍的情况相符。城市黑人的饮食结构逐渐变化，目前脂肪和膳食纤维含量较低，但尚未与该疾病（以及大多数其他非感染性肠道疾病）的显著增加相关联。
