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Table 3 Clinical course and outcomes among adults hospitalized with laboratory-confirmed influenza with and without pneumonia, Emerging Infections Program, 2005–2008 (n = 4765)

From: Pneumonia among adults hospitalized with laboratory-confirmed seasonal influenza virus infection—United States, 2005–2008

Outcome Patients with pneumonia n = 1392; no. (%) Patients without pneumonia n = 3373; no. (%) Unadjusted odds ratio (95 % CI) Adjusted odds ratioa (95 % CI)
Length of stay >7 days 414 (30) 408 (12) 3.06 (2.62–3.57) 2.99 (2.54–3.53)
Intensive Care Unit 370 (27) 329 (10) 3.34 (2.83–3.94) 3.62 (3.04–4.32)
Mechanical ventilation 254 (18) 162 (5) 4.38 (3.56–5.39) 4.79 (3.82–6.01)
Death 120 (9) 55 (2) 5.69 (4.11–7.88) 6.06 (4.21–8.71)
  1. aEach outcome is adjusted for age, nursing home residence, the presence of underlying medical conditions, and days from symptom onset to hospital admission