Table 1. Characteristics of 29 patients infected with highly pathogenic avian influenza virus (H5N1), northern Vietnam, 2004–2005*.

Characteristic	Value
Age, y, mean ± SD	35.1 ± 14.4
M:F sex (%)	15:14 (52:48)
High-risk exposure, no. (%)†
Poultry	19 (65.5)
Sick poultry	12 (41.4)
Family infected with H5N1 virus subtype	6 (20.7)
Sick poultry or person	15 (51.7)
Hospitalization after disease onset, median, d (IQR)	6 (4–8)
Hospital stay, median, d (IQR)	14 (9–17)
Treated with oseltamivir, no. (%)	25 (86.2)
Began treatment with oseltamivir after disease onset, median, d (IQR)	7 (5–10)
Treated with methylprednisolone, no. (%)	15 (51.7)
Died, no. (%)	7(24.1)

*IQR, interquartile range.
†Poultry, a history of exposure to sick or healthy poultry; sick poultry or person, a history of exposure to sick poultry or a family infected with avian influenza (H5N1).