PURPOSE: The major cause of death in aggressive lymphoma is relapse or nonresponse to initial therapy.
目的：侵袭性淋巴瘤的主要致死原因是复发或对初始疗法无应答。
As one of the difficult items in sampling survey, nonresponse directly affects the precision of the survey.
无回答问题是抽样调查中的难点之一，它的出现直接影响着估计的精度。
Multivariable analysis was performed to determine which factors were independently associated with BMD nonresponse.
我们采用多变量分析来验证哪些因子与骨密度的无反应性相关。
Conclusion: in groups of patients, short-term changes in markers of bone turnover appear to be predictors of longer term BMD response and nonresponse to bisphosphonate therapy.
结论：短期内骨转化标志物的变化可以预测患者骨密度对双磷酸盐治疗的远期反应。
The paper introduces multiple imputation (mi) for missing data in stratified random sampling, and discusses the ordinary method of mi with ignorable nonresponse, and illustrates the essential steps.
介绍分层随机抽样条件下多重插补法处理缺失数据的基本思想，分析可忽略无回答的分层随机抽样建立多重插补的常用方法，并通过实例加以说明。
The paper introduces multiple imputation (mi) for missing data in stratified random sampling, and discusses the ordinary method of mi with ignorable nonresponse, and illustrates the essential steps.
介绍分层随机抽样条件下多重插补法处理缺失数据的基本思想，分析可忽略无回答的分层随机抽样建立多重插补的常用方法，并通过实例加以说明。
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