流行病学作为一门方法学的学科,近年来越来越受到人们的重视,其中病例对照研究作为流行病学的一种主要研究方法,近年来也得到了很大的发展和广泛的应用。相对于前瞻性研究来说,病例对照研究具有投资少、收效快的明显优点,尤其是对于一些罕见病的病因研究更是如此。病例对照研究往往能在较短 As a methodological discipline, epidemiology has drawn more and more attention in recent years. Case-control study as a major epidemiological method has been developed and widely applied in recent years. Compared with the prospective study, the case-control study has obvious advantages of less investment and quick response, especially for the etiology of some rare diseases. Case-control studies tend to be shorter