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Sensitivity analyses.
The influence on the incremental cost-effectiveness ratio on varying ages at initial device implantation (A), RRs for heart failure hospitalization (B), incremental costs of CRT-D versus ICD (C), and battery lives of devices (D). CRT-D = cardiac resynchronization therapy combined with an ICD; ICD = implantable cardioverter-defibrillator; QALY = quality-adjusted life-year; RR = risk ratio.
