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Table 2 Seasonality indicesa of occupational injuries (per 10,000 FTE) treated in US emergency departments by injury event typeb

From: Temporal trends in occupational injuries treated in US emergency departments, 2012–2019

Month

All injuries

Violence and other injuries by persons or animals

Transportation incidents

Falls, slips, and trips

Exposure to harmful substances or environments

Contact with objects and equipment

Overexertion and other bodily reaction

January

0.93

0.87

0.94

1.17

0.82

0.88

0.91

February

0.87

0.82

0.87

1.09

0.81

0.81

0.86

March

0.97

0.95

0.93

1.00

0.87

0.96

1.01

April

0.96

1.02

0.92

0.85

0.89

0.96

1.02

May

1.03

1.08

1.02

0.97

1.03

1.06

1.02

June

1.07

1.06

1.10

0.98

1.15

1.13

1.04

July

1.15

1.18

1.15

1.04

1.45

1.16

1.08

August

1.13

1.10

1.03

1.03

1.31

1.17

1.10

September

1.02

1.06

1.06

0.95

1.05

1.05

1.01

October

1.04

1.04

1.04

0.99

0.94

1.08

1.05

November

0.94

0.94

0.99

0.94

0.88

0.91

0.97

December

0.89

0.88

0.94

0.99

0.82

0.84

0.92

  1. aCalculated by dividing the mean rate for each month by the mean monthly occupational injury rate for the entire dataset
  2. bNumerator data (monthly ED-treated injury count estimates) are from the National Emergency Injury Surveillance System—Occupational Supplement (NEISS-Work) dataset and were produced using the R packages “survey” and “srvyr.” Denominator data (FTE) were obtained from the Current Population Survey (CPS) via NIOSH Employed Labor Force querying system. Injury event type definitions are based on the Bureau of Labor Statistics Occupational Injury and Illness Classification System version 2.01