Multiple imputations for missing data in lifecourse studies

Bianca L. De Stavola ()
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Bianca L. De Stavola: London School of Hygiene and Tropical Medicine

No 8, United Kingdom Stata Users' Group Meetings 2003 from Stata Users Group

Abstract: Missing imputation (MI) is a method to deal with missing at random (MAR) data. It is a Monte Carlo procedure where missing values are replaced by several (usually less than 10) simulated versions. It consists of three steps (Shafer, 1999): i. generation of the imputed values for the missing data; ii. analysis of each imputed data set where missing observations are replaced by imputed ones; iii. combination of the results from all imputed data sets. The procedure is easily implemented in Stata for univariate normally distributed missing variables. Extensions to the case of multivariate normal variables - often encountered in life course epidemiology - will be discussed.

Date: 2003-03-16
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