Table 5.

One-nearest-neighbor matching and covariate balance in the whole sample.

Variable	Sample	Mean		% Bias	% Reduction |Bias|	t-Test
		Treated	Control			t	p > |t|
Male	Unmatched	0.254	0.303	−10.9		−2.070	0.039
	Matched	0.254	0.254	0.0	100.0	0.000	1.000
Age	Unmatched	18.378	18.258	15.6		3.460	0.001
	Matched	18.378	18.358	2.7	82.8	0.340	0.731
Single child	Unmatched	0.355	0.683	−69.4		−13.650	<0.001
	Matched	0.355	0.355	0.0	100.0	0.000	1.000
Ethnicity	Unmatched	0.860	0.928	−22.3		−5.090	<0.001
	Matched	0.860	0.865	−1.7	92.4	−0.210	0.835
Rural	Unmatched	0.534	0.283	52.8		10.780	<0.001
	Matched	0.534	0.536	−0.5	99.0	−0.070	0.943
Economic status	Unmatched	2.231	2.595	−53.0		−10.970	<0.001
	Matched	2.231	2.231	0.0	100.0	0.000	1.000