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Risk-based HTE results for days alive and free of ICU at 28 days—DAFICU28—according to customized APACHE II predicted mortality and randomization arm. Note that the differences in DAFICU28 are more pronounced for more severe patients (last quartile). Numeric values are shown in Table 3. Parenthesis are used to denote open intervals and brackets are used to denote the interval is closed at that end
