Identiifcation and treatment of missing data
10.3969/j.issn.1672-7347.2013.12.014
- VernacularTitle:缺失数据的识别与处理
- Author:
Lin SHEN
;
Qianhong CHEN
;
Hongzhuan TAN
- Publication Type:Journal Article
- Keywords:
missing data;
missingness mechanism;
survey and research
- From:
Journal of Central South University(Medical Sciences)
2013;38(12):1289-1294
- CountryChina
- Language:Chinese
-
Abstract:
Missing data plagues almost all surveys and researches. The occurrence of missing data will cause losses of original sample information and undermine the validity of the research results to some extents, so researchers should attach great importance to this problem. In this article, we introduced 3 kinds of missingness mechanism, namely missing completely at random, missing at random, and not missing at random. We summarized some common approaches to deal with missing data, including deletion, weighting approach, imputation and parameter likelihood method. Since these methods had its pros and cons , we should carefully select the proper way to handle missing data according to the missingness mechanism.
