Rachanis C C, Shear M
Community Dent Oral Epidemiol. 1978 Nov;6(6):296-9. doi: 10.1111/j.1600-0528.1978.tb01170.x.
Cases of primordial cysts derived from the records of all the hospital pathology departments and private pathology practices on the Witwatersrand, were recorded for the 10-year period 1965-74. The population at risk (1970 census) was 974,390 Whites and 1,567,280 Blacks. Age-specific morbidity rates for each sex and race were calculated, as well as age-standardized incidence rates standardized against African, World and European standard populations. The age-standardized incidence rates for primordial cysts, standardized against a World standard population, per million per year are 0.61, 0, 4.86 and 3.50 for Black males and females and White males and females, respectively. In the population at risk, primordial cysts are much more common in Whites than in Blacks, the incidence being eight times higher in White males than in Black males. The present study confirms that there is a bimodal age distribution but with a higher incidence of the cyst in the age group 50-64 years than previously suspected. This may be either because a substantial number of cases remain undiagnosed for many years or because there are two groups of primordial cyst: one which is triggered in young patients and the other in older patients.
收集了1965年至1974年这10年间，威特沃特斯兰德地区所有医院病理科和私人病理诊所记录的原始囊肿病例。研究对象为该地区的总人口（1970年人口普查数据），其中白人974,390人，黑人1,567,280人。分别计算了不同性别和种族的年龄别发病率，以及以非洲、世界和欧洲标准人口为参照的年龄标准化发病率。以世界标准人口为参照，原始囊肿的年龄标准化发病率（每年每百万人口），黑人男性和女性分别为0.61和0，白人男性和女性分别为4.86和3.50。在研究对象中，原始囊肿在白人中比在黑人中更为常见，白人男性的发病率是黑人男性的八倍。本研究证实，原始囊肿的年龄分布呈双峰型，但50 - 64岁年龄组的囊肿发病率比之前怀疑的要高。这可能是因为大量病例多年来未被诊断出来，或者是因为存在两类原始囊肿：一类在年轻患者中发病，另一类在老年患者中发病。
