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Table 1 Summary table of the characteristics of the imputation methods used to handle missing data

From: Imputation by the mean score should be avoided when validating a Patient Reported Outcomes questionnaire by a Rasch model in presence of informative missing data

Method Ability of the individual Difficulty of the item Addition of a random process Likelihood based approach
NOIMP     
LD     
WORST     
PMS X   X  
IMS   X X  
CIM X X X  
ICS X X   
LOG X X X X
MOK X X   
RAS X X X X
RAI X X   X