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Table 4 The cut-off value of LA strain and strain rate for POAF and ROC curve analysis

From: Strain and strain rate echocardiographic imaging predict occurrence of atrial fibrillation in post-coronary artery bypass grafting patients

Cut-off value

SN %

(95% CI)

SP %

(95% CI)

PPV %

(95% CI)

NPV %

(95% CI)

Accuracy %

(95% CI)

AUC

(95% CI)

P-value

PALS (%) ≤ 29.8

82.1%

(63.1–93.9)

80.3%

(68.2–89.4)

65.7%

(47.8–80.9)

90.7%

(79.7–96.9)

80.9%

(71.2–88.5)

0.800

(0.667–0.884)

< 0.001

LASRs (s−1) ≤ 1.6

78.6%

(59.1–91.7)

65.6%

(52.3–77.3)

51.2%

(35.5–66.7)

87%

(73.7–95.1)

69.7%

(59.0–79.0)

0.749

(0.622–0.838)

< 0.001

LASRe (s−1) ≤ −1.36

82.1%

(63.1–93.9)

73.8%

(60.9–84.2)

59%

(42.1–74.4)

90%

(78.2–96.7)

76.4%

(66.2–84.8)

0.824

(0.710–0.896)

< 0.001

LASRa (s−1) ≤ −1.67

85.7%

(67.3–96.0)

90.2%

(79.8–96.3)

80%

(61.4–92.3)

93.2%

(83.5–98.1)

88.8%

(80.3–94.5)

0.908

(0.810–0.957)

< 0.001

  1. ROC curve receiver operating characteristic curve, SN sensitivity, SP specificity, PPV positive predictive value, NPV negative predictive value, AUC area under the curve, 95% CI 95% confidence interval