Table 3.

A few of recommended imputation methods in specific scenarios.

Value distribution	Missing mechanism	Correlation structure	Recommended methods
			Mode	LogReg	MI	DT	RF	KNN	SVM	ANN
Negative event < positive event (e.g. 3:7)	MAR	< 0.5	***	*	–	***	*	–	*	***
		> 0.5	–	*	–	***	*	–	***	***
	MNAR	< 0.5	***	–	–	***	–	–	***	*
		> 0.5	***	–	–	*	–	–	***	***
	MCAR	< 0.5	*	–	–	*	–	–	***	***
		> 0.5	*	*	–	*	*	–	***	***
Negative event ≈positive event (e.g. 5:5)	MAR	< 0.5	–	***	–	*	***	–	*	***
		> 0.5	–	***	–	*	***	–	*	***
	MNAR	< 0.5	–	*	–	–	*	–	–	*
		> 0.5	–	***	–	*	***	–	*	***
	MCAR	< 0.5	–	***	–	*	***	–	***	***
		> 0.5	–	***	–	*	***	–	*	***
Negative event > positive event (e.g. 7:3)	MAR	< 0.5	***	–	–	*	–	*	***	***
		> 0.5	–	–	–	***	*	*	***	***
	MNAR	< 0.5	–	*	–	*	*	*	–	*
		> 0.5	–	*	–	*	*	–	*	*
	MCAR	< 0.5	*	–	–	***	–	*	***	***
		> 0.5	–	*	–	***	*	*	***	***

***Recommended methods.

*Acceptable methods.

– Not recommended methods.