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Table 7 Top 10 enriched codes for July 5th. The top 10 most enriched codes for July 5th. As expected for the day after Independence Day, the most enriched codes were related to firework accidents and burns as the injured persons from July 4th continue to appear in the hospital. 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 5th Average Code Count

Daily Average Code Count

% Increase

Description

E923.0

7.43

0.05

14,186.38

Accident caused by fireworks

E923

8.65

0.20

4144.02

Accident caused by explosive material

940

1.35

0.31

330.34

Burn confined to eye and adnexa

944.2

1.61

0.41

288.29

Blisters, epidermal loss [second degree] of hand, unspecified site

948.00

5.87

1.54

282.12

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

948.0

5.87

1.55

278.04

Burn [any degree] involving less than 10% of body surface

948

7.48

2.23

235.42

Burns classified according to extent of body surface involved

944.2

4.57

1.40

225.29

Blisters, epidermal loss [second degree]

943.2

2.70

0.83

223.88

Blisters, epidermal loss [second degree]

941.2

2.74

0.86

218.77

Blisters, epidermal loss [second degree]

921.3

1.35

0.48

182.44

Contusion of eyeball