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Table 8 Top 10 enriched codes for December 24th. The top 10 most enriched codes for December 24th. The most enriched codes were related to alcohol poisoning, injury to spleen, and injury undetermined inflicted. To reduce the false positive rate of the code enrichment from extremely rare codes that appeared during the baseline period, the enriched codes were only counted if they appeared more than 10 times over the 24 year period. We also report by percent increase rather than -log(p) for better interpretability

From: Evaluation of the secondary use of electronic health records to detect seasonal, holiday-related, and rare events related to traumatic injury and poisoning

ICD 9 Code

December 24th Average Code Count

Daily Average Code Count

% Increase

Description

865.0

1.65

0.93

77.16

Injury to Spleen without mention of open wound into cavity

980.0

4.39

2.56

71.76

Toxic effect of ethyl alcohol

865

1.65

1.01

64.33

Injury to spleen

E980-E989

2.96

1.87

57.91

Injury Undetermined Whether Accidentally Or Purposely Inflicted

E980

1.83

1.17

55.93

Poisoning by solid or liquid substances

980

4.57

3.29

38.70

Toxic effect of alcohol

E812.1

1.96

1.46

34.11

Other motor vehicle traffic accident involving collision with motor vehicle injuring passenger in motor vehicle other than motorcycle

E816

2.22

1.73

28.51

Motor vehicle traffic accident due to loss of control

E849.9

2.65

2.21

19.85

Accidents occurring in unspecified place

E819.9

5.17

4.61

12.31

Motor vehicle traffic accident of unspecified nature