|Correlation between ILI consultation rates of the sentinel general practice network and four other surveillance systems*|
|Number of hospital admissions/10,000 inhabitants||ILI incidence GIS/10,000 participants||Estimated ILI incidence GFT/10,000 inhabitants||Number of influenza virus detections|
|ILI consultation rates, sentinel GPs/10,000 enrolled patients||0.92||0.84||0.84||0.77|
|(p < 0.001)||(p < 0.001)||(p < 0.001)||(p < 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 complete study period (20-4-2009 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