Demographic and clinical variables of patients hospitalized due to influenza A(H1N1)pdm09 associated with Severe Acute Respiratory Illness, who died (case) or recovered (control), metropolitan regions of São Paulo and Campinas, state of São Paulo, Brazil, 2009.

a Data collected from hospital records;
b Unadjusted OR
c IQR: Inter-quartile range. Minimum and maximal ages were 0.13 and 84.7 years of age for cases and 0.04 and 85.8 years of age for controls
dRecorded in medical charts;
e The denominator of proportions are women of reproductive age (10 to 49 years), cases (80) and controls (132)
fChronic pneumonia, chronic obstructive pulmonary disease, cystic fibrosis, bronchiectasis;
gMalignant neoplasm, autoimmune disease, use of immunosuppressant (corticosteroids/others), organ transplants and HIV/AIDS;
hChronic cardiovascular disease, heart failure, peripheral vascular disease, cardiac arrhythmia, congenital disease, ischemic disease;
iNeurological diseases, delay in development, muscular dystrophy and Down’s syndrome;
j1 case and 4 controls ignored.
Demographic and clinical variables of patients hospitalized due to influenza A(H1N1)pdm09 associated with Severe Acute Respiratory Illness, who died (case) or recovered (control), metropolitan regions of São Paulo and Campinas, state of São Paulo, Brazil, 2009.