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Table 3 Rate of endpoints according to indications

From: Risk of subsequent ventricular arrhythmia is higher in primary prevention patients with implantable cardioverter defibrillator than in secondary prevention patients

 

Primary Prevention patients with VA

Secondary Prevention

Incidence rate ratioa

P-Value

Before matching

 Rate of Appropriate therapy (per 100 patients-year)

59.46 (55.30–63.62)

20.64 (18.33–22.96)

2.880 (2.305–3.599)

<0.001

 Rate of All-cause mortality (per 100 patients-year)

14.08 (11.27–16.90)

5.40 (4.25–6.56)

2.607 (1.884–3.606)

<0.001

After matching

 Rate of Appropriate therapy (per 100 patients-year)

41.80 (37.19–46.41)

19.10 (15.98–22.22)

2.491 (1.889–3.287)

<0.001

 Rate of All-cause mortality (per 100 patients-year)

12.61 (9.99–15.23)

9.33 (7.34–11.31)

1.352 (0.927–1.972)

0.117

  1. Abbreviations: VA Ventricular Arrhythmia
  2. aCompared with secondary prevention patients