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Table 1 Demographic characteristics of the study population

From: Respiratory tract mortality in cement workers: a proportionate mortality study

Cement production workers
Number of deaths 632
Age at death(mean, range) 68 (27-102)
Starting date of employment(range) 1912-1989
Ending date of employment (range) 1949-1998
Blue-collar maintenance workers
Number of deaths 336
Age at death(mean, range) 68.4 (31-110)
Starting date of employment(range) 1919-1995
Ending date of employment (range) 1948-1998
Office workers
Number of deaths 189
Age at death(mean, range) 72 (32-100)
Starting date of employment(range) 1910-1984
Ending date of employment (range) 1945-1998