Epidemiological analysis of severe hospitalized 2009 pandemic XXXX (H1N1) cases in Catalonia, Spain.

@entity1 @entity4094 @entity6 @entity326 @entity28 @entity565 @entity73 @entity683 @entity1576 @entity302 @entity1030 @entity204 @entity65
From 25th April 2009 to 20th January 2010, 771 laboratory confirmed cases of 2009 pandemic @entity683 (H1N1) were admitted to intensive care units (ICU) or hospitalized in medical wards with clinical criteria of severe disease (hospitalized pneumonias, multiorganic failure, @entity326 or admitted to ICU or @entity204 while hospitalized). 82% of cases were hospitalized between epidemiological week 43 and 48 (25th October - 5th December 2009). Median age of @entity1 was 40 years (range 0-89 years) and 56% were males. 38.7% cases were in the 15-44 year age-group, 29.4% in the 45-64 and 21.8% were @entity1 under 15 years of age. 36.8% were admitted to an ICU and 48 died. Underlying conditions were absent in 29% of @entity1 (up to 38% among those under 15 years old). Differences in the prevalence of underlying conditions were found between @entity1 and adults. In @entity1 less than 15 years old, @entity565 (16.2%), other @entity1576 (12.7%), @entity73 (10.2%), @entity302 (8.7%) and @entity4094 (7.1%) were the most frequent. In adults, @entity1030 (14.8%), @entity65 (12.6%), @entity565 (11.5%), @entity6 (11.2%) and morbid @entity28 (10.6%) were the most frequent. Further surveillance is needed to better characterize the epidemiology of this pandemic.
