Comparison of five influenza surveillance systems during the 2009 pandemic and their association with media attention

Table 1 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).

ISSN: 1471-2458