Longitudinal measurements of two Prostate Specific Antigen (PSA)-based biomarkers for 71 prostate cancer cases and 70 controls.
psa
The psa
data frame has 683 rows and 6 columns:
id
patient id.
marker1
total PSA.
marker2
ratio of free total PSA.
status
disease status of each subject, with 1
identifying
subjects diagnosed with prostate cancer.
age
age in years.
t
time prior to diagnosis.
The data were gathered from the Beta-Carotone and Retinol Efficacy Trial (CARET)---a lung cancer prevention trial, conducted at the Fred Hutchison Cancer Research Center. Further details on this study can be found in de Carvalho et al. (2020).
de Carvalho, M., Barney, B. and Page, G. L. (2020) Affinity-based measures of biomarker performance evaluation. Statistical Methods in Medical Research, 20, 837-853.