Table 6

Correlation between Twitter positives and CDC cases

Category

Spearman’s Rhoa

p-valueb


A

0.66

0.020

S

0.66

0.021

I

0.58

0.048

P

0.67

0.017

A+I+P

0.68

0.008

A+I+P+S

0.67

0.017


Correlation between CDC AH1N1 laboratory data frequency for Influenza 2009-2010 and aggregated self protection behaviour counts and self reported diagnosis from Tweets. a Spearman’s rank-order correlation coefficient. b p values are reported for a two-tailed test. Calculations were done using VassarStats (http://faculty.vassar.edu/lowry/corr_rank.html webcite)

Collier et al. Journal of Biomedical Semantics 2011 2(Suppl 5):S9   doi:10.1186/2041-1480-2-S5-S9

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