Table 1.

Baseline participant characteristics according to MI.

	Incident MI (n = 421)	Control (n = 10,866)	p-value before PS*	Matched control (n = 1,263)	p-value after PS
Continuous variables
Age	60.0 (9.0)	58.2 (9.2)	< 0.001	60.0 (9.4)	0.964
Number of IADLs	0.2 (0.7)	0.1 (0.6)	0.017	0.2 (0.6)	0.213
Episodic memory	3.2 (1.9)	3.3 (1.9)	0.746	3.3 (2.0)	0.908
Visuospatial abilities	0.6 (0.5)	0.7 (0.5)	0.813	0.6 (0.5)	0.741
Attention and calculation	2.9 (2.0)	2.8 (2.0)	0.178	2.8 (2.0)	0.198
Orientation	3.7 (1.4)	3.8 (1.4)	0.862	3.8 (1.4)	0.951
Categorical variable
Males	172 (40.9)	5,252 (48.3)	0.003	546 (43.2)	0.393
Education			0.499		0.398
Illiterate	118 (28.0)	2,891 (26.6)		338 (26.8)
Primary school	156 (37.1)	4,345 (40.0)		467 (37.0)
Middle school	99 (23.5)	2,307 (21.2)		274 (21.7)
High school and above	48 (11.4)	1,323 (12.1)		184 (14.6)
Marital status			0.510		0.830
Married	368 (87.4)	9,713 (88.8)		1,190 (87.8)
Other status	53 (12.6)	1,153 (11.3)		154 (12.2)
Residence			0.019		0.791
Urban	102 (24.2)	2,128 (19.6)		298 (23.6)
Rural	319 (75.6)	8,738 (80.4)		965 (96.4)
Current smoking	147 (34.9)	4,254 (39.2)	0.081	457 (36.2)	0.639
Current drinking	88 (20.0)	3,161 (26.8)	0.002	263 (20.8)	0.702
Depression	111 (26.7)	2,075 (19.1)	< 0.001	332 (26.3)	0.987
Hypertension	173 (41.1)	2,778 (25.6)	< 0.001	511 (40.4)	0.819
Diabetes	51 (11.8)	709 (5.8)	< 0.001	174 (13.8)	0.385
High total cholesterol	89 (21.1)	1,460 (13.4)	< 0.001	263 (20.9)	0.890
Lung diseases	61 (14.5)	903 (8.3)	< 0.001	185 (14.7)	0.937
Cancer	5 (1.2)	88 (0.8)	0.394	16 (1.3)	0.899

^*Calculated using t-test for continuous covariates and χ² or Fisher test for categorical covariates.