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Table 1 Correlation between ILI consultation rates of the sentinel general practice network and four other surveillance systems *

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

  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)
  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).