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Table 2 List of information environment indices used in pandemic and non-pandemic model

From: Characterizing Influenza surveillance systems performance: application of a Bayesian hierarchical statistical model to Hong Kong surveillance data

Parameter Coefficient Acronym  
k 1 , θ , t p β j,t,2 Sea.flu Google search index for seasonal flu terms
k 2 , θ , t p β j,t,3 Symp Google search index for symptoms
k 3 , θ , t p β j,t,4 Med Google search index for medications
k 4 , θ , t p β j,t,5 Non-flu Google search index for non-flu terms
k 1 , φ , t p α j,t,2 Total HealthMap total number of alerts
k 2 , φ , t p α j,t,3 Unique HealthMap number of unique alerts
k 3 , φ , t p α j,t,4 HCF HealthMap number of healthcare facilities related alerts
k 4 , φ , t p α j,t,5 %RSV Lab surveillance% RSV tested positive
k 5 , φ , t p α j,t,6 Authority Google search index for authority
k 6 , φ , t p α j,t,7 Pan.flu Google search index for pandemic flu terms
k 1 , t np ρ s,j,t,2 Non-flu Index Avian influenza, bird flu, common cold, severe acute respiratory syndrome (SARS), pneumococcus,% RSV
k 2 , t np ρ s,j,t,3 Illness Index body temp,% RSV, cough, fever, nasal congestion, cough relief remedies, headache, common cold, pediatric, paediatric
k 3 , t np ρ s,j,t,4 Public-awareness Index CHP, Hospital Authority, Ministry of Health, disinfect, flu, influenza, pandemic, epidemic, school closures, total number of HealthMap alerts, number of healthcare facilities related alerts, number of school related alerts, number of “breaking” alerts