Table 6.

imputation methods

Methods		Number of studies
Missing at random		4
Treated as separate category		1
Single Imputation	AUC analysis	2
	Last observed carried forward analysis	6
	Last observation carried forward based on intention to treat analysis	1
	Logistic regression method	1
	Regression model incorporating baseline covariates	1
	Mean imputation	1
	Conservative statistic (NMAR)	1
	Baseline group mean imputed as a null effect both for pre and post-intervention analysis	1
	Continuous time variable with random slope in a longitudinal model	1
	Monte Carlo error computation model including all the variables to be used in the analysis	1
Multiple imputation stathistical methods		15