Table 2. Distribution according to influenza season of samples with available information and percentage of vaccinated and unvaccinated patients. Catalonia, 2010–2013.

Season	Vaccinated patients	Not vaccinated patients	OR (95%CI) P value
2010–2011	165/ (13%)	952 (87.9%)	0.98 (0.76–1.26) 0.92
2011–2012	159/ (13.1%)	933 (89.7%)	0.99 (0.77- 1.28) 0.97
2012–2013	140/ (12.5%)	824 (86%)	ref

OR, odds ratio; CI, confidence interval.