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Table 4 Standardized mortality ratios compared to Hamburg and German Reference Population

From: Mortality and life expectancy of professional fire fighters in Hamburg, Germany: a cohort study 1950 – 2000

 

N

Observed

Expected

Person years

SMR

95% CI

Reference Hamburg

4557

1052

1331

111795.7

0.79

0.74–0.84

Reference Germany

4557

1052

1345.3

111795.7

0.78

0.74–0.83