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Table 3 Characteristics of included studies on both firefighting and police work and prostate cancer risk (N = 7)

From: Prostate cancer in firefighting and police work: a systematic review and meta-analysis of epidemiologic studies

Author/Year

Location of Study

Study Design

Incidence or Mortality

Follow-up Period

Number of Cases/Deaths

Cohort Size/Total Number of Casesa

Prostate Cancer Risk Estimates for Ever versus Never Employmentb

Sritharan et al, 2017b*

Canada

Cohort (linkage)

Incidence

1991–2011

165 firefighters; 325 police

1,100,000

1,100,000

HR 1.17, 95% CI 1.01–1.36; HR 1.22, 95% CI 1.09–1.36

Zeegers et al. 2004 [11]

Netherlands

Cohort (linkage)

Incidence

1986–1993

709 firefighters; 693 police

58, 279

58, 279

RR 0.59, 95% CI 0.05–6.33; RR 1.62, 95% CI 0.62–4.27

Demers et al. 1994 [28]

USA

Cohort

Incidence

1974–1989

66 firefighters; 28 police

2, 447

1, 878

SIR 1.40, 95% CI 1.10–1.70; IDR 1.10, 95% CI 0.70–1.80

Demers et al. 1992 [29]

USA

Cohort

Mortality

1945–1989

30 firefighters; 11 police

4, 546

3, 676

SMR 1.34, 95% CI 0.90–1.91; SMR 1.02, 95% CI 0.51–1.82

Sritharan et al. 2017a [79]

Canada

Case–control

Incidence

1995–1998

38 firefighters; 35 police

1, 737

1, 737

OR 1.67, 95% CI 0.94–2.95; OR 1.15, 95% CI 0.66–1.99

Sritharan et al. 2016 [80]

Canada

Case–control

Incidence

1994–1997

53 firefighters; 12 police

760

760

OR 0.73, 95% CI 0.53–1.01; OR 0.82, 95% CI 0.41–1.63

Sauve et al. 2016 [12]

Canada

Case–control

Incidence

2005–2009

26 firefighters; 45 police

1, 937

1, 937

OR 1.72, 95% CI 0.88–3.37; OR 1.60, 95% CI 1.00–2.40

  1. acohort size represents the total sample size in only cohort studies, and the total number of cases is only applicable to case–control studies
  2. bHR – hazard ratio, SIR – standardized incidence ratio, SMR – standardized mortality/morbidity ratio, RR – relative risk, IDR – incidence density ratio, OR – odds ratio
  3. *manuscript submitted and currently being revised for publication