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. 2010 Jun 7;11(4):707–719. doi: 10.1093/biostatistics/kxq036

Table 1.

Log PSA growth parameter estimates (upper panel) obtained via separate linear fits to PCPT cancer and noncancer cases. Preliminary preonset intercept and slope means were fine-tuned based on test-positive and cancer detection rates in the initial round of the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial. Disease progression parameter estimates (lower panel) obtained via Nelder–Mead simplex calibration to incidence data from the SEER program across random seeds

Log PSA growth parameters
Parameter Description Posterior mean Posterior 95% CI
μ0 Preonset intercept mean (preliminary) − 1.2720 (− 0.8047)–(− 1.7393)
μ1 Preonset slope mean (preliminary) 0.0443 0.0431–0.0455
μ0 Preonset intercept mean (final) − 1.6094 (− 1.1421)–(− 2.0767)
μ1 Preonset slope mean (final) 0.0200 0.0188–0.0212
μ2 Postonset slope increment mean 0.1094 0.0919–0.1269
σ02 Preonset intercept variance 0.0568 0.0480–0.0656
σ12 Preonset slope variance 0.0019 0.0018–0.0020
σ22 Postonset slope increment variance 0.0237 0.0202–0.0272
τ2
Within-individual variance
0.0829
0.0817–0.0841
Disease progression parameters
Parameter
Description
Simplex mean
Simplex 95% CI
γ0 Hazard of disease onset 0.0005 0.0004–0.0005
γm Hazard of transition to metastatic disease 0.0004 0.0004–0.0005
γc Hazard of clinical diagnosis 0.0015 0.0013–0.0017
θc Multiplier for hazard of clinical diagnosis 19.1334 4.2105–24.0563