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Table 3 Underlying diseases of the admitted patients according to age

From: Pandemic 2009 H1N1 virus infection in children and adults: A cohort study at a single hospital throughout the epidemic

Age groups 0-15 y
(n = 217)
16-40 y
(n = 100)
41-64 y
(n = 35)
≥ 65 y
(n = 21)
Total cases (n,%) 17 (7.8) 15 (15) 15 (42.9) 16 (76.2)
Hypertension   1 2 6
Chronic lung disease     
   COPD    3 7
   Asthma 10 4 2 3
Others 1    2
Cancer   1 1  
Diabetes   3 2 3
Neurologic disorder 4 1 1 3
Heart disease   1 1 5
Chronic liver disease 1 2 4 3
Chronic renal disease 1 3 2 1
Autoimmune disorder   2 1  
Immunosuppresion 1 3 1 1
Pregnancy*   4   
  1. COPD; chronic obstructive pulmonary disease
  2. * Pregnancy was not defined as underlying disease