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Figure 3: Percentage of patients with 0, 1-7, 8-14, 15-21, 22-28 ventilator-free days during the first 28 days after enrollment by age group (a), gender (b), race (c), location before admission to Intensive Care Unit (d), and patient location (e); either Chi-squared test or Fisher's exact test was used to calculate P values

Figure 3: Percentage of patients with 0, 1-7, 8-14, 15-21, 22-28 ventilator-free days during the first 28 days after enrollment by age group (a), gender (b), race (c), location before admission to Intensive Care Unit (d), and patient location (e); either Chi-squared test or Fisher's exact test was used to calculate <i>P</i> values