A critical review of the epidemiology of Agent Orange/TCDD and prostate cancer.

Borderline significant differences in prostate cancer incidence between Ranch Hands and comparison subjects were detected only in subgroup analyses that compared Ranch Hands who spent 100 % of their Southeast Asia service in Vietnam (SIR = 1.66 [1.00–2.60]) with comparison subjects who spent 0 % of their Southeast Asia service in Vietnam (SIR = 0.59 [0.15–1.61]; P heterogeneity = 0.08), or that were restricted to veterans who spent a maximum of 2 years in Southeast Asia (SIR for Ranch Hands = 1.54 [0.98–2.32]; SIR for comparison subjects = 0.68; P heterogeneity = 0.05).

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