Methods The areas of KBD were stratified into three prevailing levels which were of low ,moderate and high prevalence according to the 1978 surveillance data.
英
美
- 方法将1978年全民普查临床患病率分为轻、中、重病情三层;每层随机抽取1/3的行政村;进行全民大骨节病临床检查和流行病学调查。结果临床检查25656人;检出大骨节病患者3489例;患病率13.;6%25。