Jackson M B
Imperial Cancer Research Fund Cancer Epidemiology Unit, Radcliffe Infirmary, Oxford.
Horm Res. 1988;30(4-5):153-6. doi: 10.1159/000181052.
A total of 3,559 boys were examined for cryptorchidism over a 2-year period. At birth, 5.9% (210/3,534) had one or both testes undescended and at 3 months of age 1.61% (57/3,534) still had an undescended testis. These figures represent an increase in undescended testis of 40% at birth and 68% at 3 months when compared with figures collected in a similar study in the late 1950s. This increase in cryptorchidism still does not account for the increased number of orchiopexies being performed. Low birthweight was also found to be a risk factor for the presence of an undescended testis.
在两年时间里，共对3559名男孩进行了隐睾症检查。出生时，5.9%（210/3534）的男孩有一侧或双侧睾丸未降，3个月大时，1.61%（57/3534）的男孩仍有睾丸未降。与20世纪50年代末一项类似研究收集的数据相比，这些数字表明出生时隐睾症增加了40%，3个月时增加了68%。隐睾症的这种增加仍无法解释睾丸固定术实施数量的增加。低出生体重也被发现是存在隐睾症的一个风险因素。
