Table 4.

Adjusted HRs of time from the first PSA to a follow-up activity using Cox proportional hazards models (N = 2,486)

CovariatesHR (95% CI)P value
Age1.00 (0.99–1.02)0.941
Race ethnicity0.004a
 African-American1 (—)
 Non-Hispanic white0.73 (0.54–0.99)0.042
 Hispanic0.64 (0.49–0.84)0.001
 Other0.45 (0.24–0.81)0.009
Benign prostatic hyperplasia1.60 (1.29–1.98)<0.001
No. of non–prostate-related clinical conditions0.051a
 01 (—)
 10.80 (0.63–1.01)0.058
 20.94 (0.75–1.19)0.616
 ≥31.09 (0.84–1.41)0.524
Insurance type0.146a
 CareLink A1.13 (0.84–1.50)0.419
 CareLink other1.25 (1.01–1.54)0.039
 Medicaid1.05 (0.75–1.4)0.796
 Medicare1 (—)
 Private/state agency1.41 (1.08–1.83)0.011
 Other1.28 (0.67–2.46)0.458
First PSA result (ng/mL)<0.001a
 <11 (—)
 1–2.41.27 (1.05–1.53)0.013
 2.5–3.92.48 (1.91–3.22)<0.001
 ≥48.11 (6.44–10.22)<0.001
Length of observation1.44 (1.26–1.65)<0.001
  • aOn the basis of Wald χ2 test for testing the overall effect of the category variable of interest.