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Table 3: Cox proportional hazards model for variables associated with MACE^{^a} occurrence
Model 1^{^b} Model 2^{^c}
HR (95% CI) P Value HR (95% CI) P Value
Diabetes mellitus 0.60 (0.28–1.24) .17 NA NA
Atrial fibrillation 1.07 (0.33–3.48) .91 NA NA
Hounsfield unit 0.96 (0.94–0.98) <.001 0.96 (0.94–0.98) <.001
Spotty calcium 4.00 (2.00–8.00) <.001 3.97 (2.08–7.60) <.001
Napkin-ring sign 0.75 (0.36–1.55) .45 NA NA
Calcium score 1.00 (1.00–1.001) .25 NA NA
Note:—NA indicates not applicable.
↵a Any stroke, ACS, or cardiovascular mortality.
↵b Model 1 is multivariable analysis including all variables with P < . 1 in univariable analysis.
↵c Model 2 is multivariable analysis with backward elimination of variables with P < . 1 in univariable analysis.

	Model 1^{^b}		Model 2^{^c}
	HR (95% CI)	P Value	HR (95% CI)	P Value
Diabetes mellitus	0.60 (0.28–1.24)	.17	NA	NA
Atrial fibrillation	1.07 (0.33–3.48)	.91	NA	NA
Hounsfield unit	0.96 (0.94–0.98)	<.001	0.96 (0.94–0.98)	<.001
Spotty calcium	4.00 (2.00–8.00)	<.001	3.97 (2.08–7.60)	<.001
Napkin-ring sign	0.75 (0.36–1.55)	.45	NA	NA
Calcium score	1.00 (1.00–1.001)	.25	NA	NA