Freeman J L, Jekel J F, Freeman D H
Am J Public Health. 1982 May;72(5):488-91. doi: 10.2105/ajph.72.5.488.
National estimates of tonsillectomy rates were generated from the Hospital Discharge Survey for the years 1970 and 1977. A comparison of the rates over the seven-year period revealed significant declines in T&A for all age and sex categories and in tonsillectomy alone for males aged 20 through 29. It was also observed that sex differences found in 1970 persisted in 1977. (Am J Public Health 1982; 72:488-491.)
扁桃体切除术比率的全国性估计数据来自1970年和1977年的医院出院情况调查。对这七年期间的比率进行比较后发现，所有年龄和性别的扁桃体和腺样体切除术比率以及20至29岁男性单纯扁桃体切除术比率均显著下降。还观察到，1970年发现的性别差异在1977年依然存在。（《美国公共卫生杂志》1982年；72:488 - 491）
