Sociodemographic and clinical characteristics of in- and outpatients with confirmed diagnoses of influenza H1N1(2009).

1Before the flu episode in adults of working age (16 to 64 years old); 2 in women of childbearing age (15 to 50 years old) Missing values do not count toward the total percentages. *Statistically significant differences between follow-up sample and the remainder of the complete sample, for each type of patient (p <0.05). T student test was performed to compare mean age and a chi squared test was used for the rest of the comparisons.