Reported frequency in case series | |
Clinical findings | |
Cough | 80 to 90% |
Fever | 40 to 90% |
Stridor | 50 to 75% |
Dyspnea and/or retractions | 30 to 80% |
Hoarseness | 30 to 60% |
Odynophagia | 40% |
Toxic appearance | 10 to 30% |
Drooling | 10% |
Duration of prodromal symptoms before hospital admission | 2 to 2.5 days |
Radiographic findings | |
Tracheal irregularity or membranes evident | 40 to 85% |
Subglottic narrowing | 10 to 45% |
Pulmonary infiltrates | 20 to 60% |
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