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Table 6 Top correlations calculated between ICD-10 coded cases and NIDS cases in the non-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 Not postcode restricted data
(n ≥ 200 records)
Postcode restricted
(n ≥ 200 records)
   Correlation p Correlation p
T40 Poisoning by opium 0.198 0.0020 0.173 0.0070
N30 Cystitis 0.194 0.0024 0.199 0.0017
F13 Mental/behavioral disorder due to sedatives hypnotics 0.192 0.0027   
A09 Infectious gastroenteritis and colitis, unspecified 0.186 0.0040   
S22 Fracture of ribs 0.175 0.0063   
L98 Pyogenic granuloma    0.181 0.0045
A41 Other sepsis    0.209 0.0011
A64 Unspecified sexually transmitted disease    0.164 0.0105