Table 5.

Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial Mortality According to Tumor Stage and Screening Rate

Parameter	Screening Group	Control Group	Rate Ratio (95% CI)
Cancer incidence	3452	2974	1.17 (1.11–1.22)
Cancer mortality	92	82	1.11 (0.83–1.50)
Death according to tumor stage
Stage I or II (%)	60	52
Stage III (%)	2	4
Stage IV (%)	36	39
Death according to rate of screening
≦ 1 PSA test at baseline, at 7 years	48	41	1.16 (0.76–1.76)
≦ 1 PSA test at baseline, at 10 years	83	75	1.09 (0.80–1.50)
2 or more PSA tests in previous 3 years at baseline, 7 years	2	3	0.70 (0.12–4.17)
2 or more PSA tests in previous 3 years at baseline, 10 years	9	7	1.34 (0.50–3.59)

Data from Andriole GL et al.²