Skip to main content
. Author manuscript; available in PMC: 2014 Jun 4.
Published in final edited form as: J Expo Sci Environ Epidemiol. 2013 Aug 28;24(1):82–88. doi: 10.1038/jes.2013.47

Table 1.

Demographic Characteristics of an Aluminum Manufacturing Cohort in the United States 1998–2008

Cohort IHD Cases
No. Workers 11,966 697
Person-Years 68,848 -
Male no. (%) 10,049 (84) 655 (94)
White no. (%) 9,919 (83) 591 (85)
Hired ≥Follow-up no. (%) 3,665 (31) 81 (12)
Year of Hire Median (IQR) 1984 (1974–1996) 1977 (1970–1988)
Year of Birth Median (IQR) 1955 (1948–1962) 1948 (1944–1953)
Manufacturing Process
 Smelter no. (%) 2194 (18) 152 (22)
 Fabrication no. (%) 8290 (69) 449 (64)
 Refinery no. (%) 960 (8) 56(8)
 Other facility type no. (%) 522 (5) 40 (6)
Recent* PM (mg/m3)
 PM2.5 median (IQR) 0.29 (0.12–1.04) 0.26 (0.12–1.04)
Cumulative PM (mg/m3-yrs)
 PM2.5 median (IQR) 5.01 (1.74–18.41) 6.95 (2.39–26.46)
*

Recent exposure is defined as exposure within the last year.