Assessment of the ability of the CHA2DS2-VASc scoring system to grade left atrial function by 2D speckle-tracking echocardiography

Table 5 Clinical outcome comparisons between 2 groups of non–high-risk and high-risk CHA₂DS₂-VASc scores

Group	Variables			P value
Group	Non-High-Risk^a Score (N = 109)	High-Risk Score (N = 203)	RR, 95% CI	P value
Mortality	2 (2)	6 (3)	1.61 (0.33–7.85)	0.555
Postoperative atrial fibrillation	1 (1)	18 (9)	9.67 (1.31–71.43)	0.026
Prolonged ICU stay	1 (1)	15 (7)	8.05 (1.08–60.16)	0.042
Prolonged mechanical ventilation	2 (2)	11 (5)	2.95 (0.67–13.09)	0.154

^aNon-high-risk group was comprised of 30 patients with low risk scores and 79 patients with moderate risk scores
CI, confidence interval; ICU, intensive care unit; RR, relative risk

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