Rolon P A, Hochsztajn de Lopez B
J Reprod Med. 1979 Aug;23(2):94-6.
The incidence of malignant trophoblastic diseases from 1960 to 1969 and 1970 to 1974 in the population of Parguay was low, as shown by the analysis of unselected hospital admissions as compared to the total population. Paraguay showed disease characteristics comparable to those of developing countries where malignant diseases of the trophoblast have elevated frequencies. The apparently high frequencies in lower socioeconomic groups appear to be due to the fact that these groups make up a large proportion of the hospital population. The hardship of poverty predisposes to the hospital concentration of pathologic pregnancies from around the country and to the home delivery of grossly normal gestations. Thus, a biased incidence of diseases results.
1960年至1969年以及1970年至1974年期间，巴拉圭人群中恶性滋养细胞疾病的发病率较低，这是通过对未筛选的住院病例与总人口进行分析得出的结果。与滋养细胞恶性疾病发病率较高的发展中国家相比，巴拉圭的疾病特征与之相当。社会经济地位较低群体中该病的发病率明显较高，这似乎是因为这些群体在医院人群中占了很大比例。贫困的艰难处境使得来自全国各地的病理妊娠病例集中在医院，而正常妊娠大多在家分娩。因此，导致了疾病发病率的偏差。
