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Table 1 Demographics of hourly production workers at 207 U.S. facilities of a global aluminum company employed between January 1, 1996 and December 31, 2007

From: Piecewise exponential models to assess the influence of job-specific experience on the hazard of acute injury for hourly factory workers

 

Entire cohort

Physical demand cohort

Cohort demographics

Count

Percent / Mean (SD)Median

Count

Percent / Mean (SD)Median

Total jobs

191 692

 

33 427

 

Total unique employees

81 301

 

13 427

 

Number of jobs per employee

 

2.36 (2.30) 2

3.99 (2.88) 3

 

Number of injuries per employee

 

0.39 (0.96) 0

0.98 (1.49) 1

 

Gender

    

  Male

63 233

77.78

12 105

90.15

  Female

18 006

22.15

1 319

9.82

  Unknown/Missing

72

0.09

3

0.00

Race/Ethnicity

    

  White

55 709

70.46

11 669

86.92

  Black

12 371

15.65

1242

9.25

  Hispanic

8340

10.55

386

2.88

  Asian

1786

2.26

46

0.34

  American Indian

610

0.77

66

0.49

  Mixed (more than one reported)

247

0.31

16

0.12

  Unknown/Missing

2238

2.75

2

0.01

Age (years) at start of job

 

39.37 (11.32) 39.23

 

42.61 (10.19) 43.24

Tenure (years) at start of job

 

8.43 (10.25) 3.62

 

13.27 (11.96) 9.60