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 |