Table 1. The list of matching methods evaluated in the study.

Method	Distance Measure	Variables included	Matching Algorithm	Matching Ratio
1	Propensity Score	All	Greedy	one-to-one
2	Propensity Score	All	Greedy	one-to-five
3	Propensity Score	All	Optimal	one-to-one
4	Propensity Score	All	Optimal	one-to-five
5	Mahalanobis	All	N/A	one-to-one
6	Mahalanobis	All	N/A	one-to-five
7	Propensity Score	Continuous	greedy	one-to-one
	Exact	Binary	N/A