Multiple imputation by chained equations for systematically and sporadically missing multilevel data
Multiple imputation by chained equations for systematically and sporadically missing multilevel data
In multilevel settings such as individual participant data meta-analysis, a variable is ‘systematically missing’ if it is wholly missing in some clusters and ‘sporadically missing’ if it is partly missing in some clusters. Previously proposed methods to impute incomplete multilevel data handle either systematically or sporadically missing data, but frequently …