|Correlation between five influenza surveillance systems and media attention, 31-8-2009 – 3-1-2010*|
|Number of newspaper articles||Number of television broadcasts|
|Spearman correlation coefficient||P-value||Spearman correlation coefficient||P-value|
|ILI consultation rates, sentinel GPs/10,000 enrolled patients||0.74||<0.001||0.68||0.002|
|Number of hospital admissions/10,000 inhabitants||0.74||<0.001||0.80||<0.001|
|ILI incidence, GIS/10,000 participants||0.49||0.038||0.59||0.010|
|Estimated ILI incidence, GFT/10,000 inhabitants||0.62||0.006||0.61||0.007|
|Number of influenza virus detections||0.79||<0.001||0.79||<0.001|
ILI influenza-like illness, GIS Great Influenza Survey, GP general practitioner, GFT Google Flu Trends.
*Spearman rank correlation coefficients were determined for the period in which media attention coincided with trends of the ILI/influenza surveillance systems (31-8-2009 through 3-1-2010).
de Lange et al.
de Lange et al. BMC Public Health 2013 13:881 doi:10.1186/1471-2458-13-881