In medical research, some variables are conditionally defined on some levels of another variable, leading to conditional missing data. Imputation of this type of structural missing data is needed given inefficiency of listwise deletion inherent in regression modeling. Using some examples, we illustrate handling of conditional missing values using simple imputation procedures in etiologic and prediction research.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11460459 | PMC |
| http://dx.doi.org/10.1016/j.gloepi.2024.100164 | DOI Listing |
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