Evaluation of a Bladder Cancer Cluster in a Population of Criminal Investigators with the Bureau of Alcohol, Tobacco, Firearms and Explosives—Part 1: The Cancer Incidence
Table 3
Standardized incidence ratios (SIRs) of self-reported and verified urinary bladder cancer cases for the period 1993–2007.
Study population
Employee #
Person-years
Expected cases*
Observed cases
SIR
95% CI
Entire roster cohort
3,768
34,818.01
2.91
7
2.41
1.17
4.96
Entire roster cohort**
3,768
34,818.01
2.91
5
1.72
0.73
4.02
Roster white males
2,723
24,496.47
2.39
7
2.93
1.42
6.07
Roster white males**
2,723
24,496.47
2.39
5
2.09
0.90
1.91
Exam white males
1,885
19,648.25
1.15
7
6.08
2.94
12.54
Exam white males**
1,885
19,648.25
1.15
5
4.34
1.85
10.16
Job 1811 white males
1,715
17,976.42
0.92
7
7.63
3.70
15.75
Job 1811 white males**
1,715
17,976.42
0.92
5
5.45
2.33
12.76
*Expected number of cases calculated using US incidence rates from SEER for the same period.
**SIRs determined for the five verified cases with pathology reports.
