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Table 2 Correlation between five influenza surveillance systems and media attention, 20-4-2009 – 3-1-2010*

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

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
  1. ILI influenza-like illness, GIS Great Influenza Survey, GP general practitioner, GFT Google Flu Trends.
  2. *Spearman rank correlation coefficients were determined for the complete study period (20-4-2009 through 3-1-2010).