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Adjusted (model 1) risk of cardioembolic (A, B) and thrombotic (C, D) stroke associated with area QRS-T angle (A, C) and SAIQRST (B, D). Restricted cubic spline with 95% CI shows a change in the HR (y-axis) in response to QRS-T angle and SAIQRST change (x-axis). 50th percentile of QRS-T angle and SAIQRST is selected as a reference. Knots of area QRS-T angle are at 21°–48° to 69°–114°. Knots of SAIQRST are at 83–119 to 151–230 mV×ms. SAIQRST, sum absolute QRST integral.
