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Table 6 Top 10 enriched codes for July 4th. The top 10 most enriched codes for July 4th. As expected for Independence Day, the most enriched codes were related to firework accidents, burns, and alcohol poisoning. 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

July 4th Average Code Count

Daily Average Code Count

% Increase

Description

E923.0

4.26

0.06

6913.3

Accident caused by fireworks

E923

4.91

0.21

2194.4

Accident caused by explosive material

E820-E825

1.70

0.69

147.0

Motor Vehicle Non-traffic Accidents

980.8

1.43

0.61

133.5

Toxic effect of other specified alcohols

948.00

2.87

1.54

85.8

Burn involving less than 10% of body surface with third degree burn

948.0

2.87

1.56

83.8

Burn involving less than 10% of body surface

948

4.09

2.24

82.5

Burns classified according to extent of body surface involved

E819.2

3.00

1.70

76.2

Motor vehicle traffic accident of unspecified nature injuring motorcyclist

851

2.09

1.22

71.1

Cerebral laceration and contusion

851.8

1.35

0.79

69.9

Other and unspecified cerebral laceration and contusion, without mention of open intracranial wound