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Kaplan-Meier curves for 90-d readmission with censoring of hospital nonsurvivors. Log-rank test: P < .001 comparing potentially antibiotic-resistant pneumonia to culture-negative pneumonia and comparing potentially antibiotic-resistant pneumonia to antibiotic-susceptible pneumonia; P = .004 comparing potentially antibiotic-resistant pneumonia to viral pneumonia; P > .05 for all other combinations of pairings.
