Skip to main content

Table 4 Top correlations calculated between ICD-10 coded cases and NIDS cases after excluding the 2009 influenza season

From: Syndromic surveillance for influenza in two hospital emergency departments. Relationships between ICD-10 codes and notified cases, before and during a pandemic

ICD-10 Code Description All data Postcode restricted
   Correlation p Correlation p
J11 Influenza virus not identified 0.433 < 0.0001 0.368 < 0.0001
J06 Acute upper respiratory infection multiple and unspecified sites 0.433 < 0.0001 0.409 < 0.0001
J22 Unspecified acute lower respiratory infection 0.424 < 0.0001 0.387 < 0.0001
B34 Viral infection, unspecified site 0.356 < 0.0001 0.365 < 0.0001
J18 Pneumonia organism unspecified 0.304 < 0.0001 0.262 < 0.0001
'Best' codes combined (r s >0.3) 0.529 < 0.0001 0.526 < 0.0001