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Table 2 Principal characteristics of the foundry worker cohort

From: Health status of male steel workers at an electric arc furnace (EAF) in Trentino, Italy

Cohort foundry workers
  Workers ≥ 1 year (exposed) Control group (office work) Workers < 1 year
Workers studied 331 32 111
 Mean duration of employment (median) 8.6 (5.5) years 5.6 (3.1) years <1 year
Lost to the follow-up 22 (6 %) 15 (31 %) 16 (12 %)
 Person-years 6731.0 491.3 2387.1
Average duration of the follow-up (range) 20.5 (1.2–30.8) years 15.5 (0.2–30.8) years 21.0 (2.2–30.8) years
 Mean age at entry 31.1 years 35.5 years 29.2 years
Observed deaths (n.) 29 1 7
 Not included 17 (exposition not certain) + 3 females 12 females  
TOTAL 373 59 127