Table 2.

Correlation between five influenza surveillance systems and media attention, 20-4-2009 – 3-1-2010*

Surveillance system	Number of newspaper articles		Number of television broadcasts
	Spearman rank correlation coefficient	P-value	Spearman rank correlation coefficient	P-value
ILI consultation rates, sentinel GPs/10,000 enrolled patients	0.32	0.055	0.22	0.188
Number of hospital admissions/10,000 inhabitants	0.22	0.183	0.15	0.372
ILI incidence, GIS/10,000 participants	0.06	0.706	0.09	0.585
Estimated ILI incidence, GFT/10,000 inhabitants	0.34	0.039	0.23	0.162
Number of influenza virus detections	0.52	<0.001	0.36	0.030

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).