Table 1. Description of diagnostic groups^*.

	Total	High risk	Other	Comparisons high risk vs other
No. of subjects	681	27	654
Age at PSA, years
Median (range)	68.8 (42.3, 95.3)	77.1 (56.8, 88.1)	68.4 (42.3, 95.3)
Mean (SD)	67.8 (11.7)	75.6 (7.8)	67.5 (11.7)	p < 0.001
Time from PSA test or cancer diagnosis to death or censoring†
Median (range)	5.9 (0, 34.6)	7.4 (2, 24.6)	5.9 (0, 34.6)	p = 0.447
Mean (SD)	7.1 (5.01)	7.8 (5)	7.1 (5)
PSA (ng/ml) at index visit
Median (range)	1.6 (0.1, 351.9)	16.5 (0.5, 351.9)	1.5 (0.1, 18.6)	p = 0.015
Mean (SD)	3.9 (16)	38.5 (72.1)	2.5 (2.8)

Abbreviations: PSA, prostate-specific antigen; SD, standard deviation; pCA, prostate cancer.

^*Subjects consisted of 681 participants in the Baltimore Longitudinal Study of Aging with or without high-risk pCA (see “Methods” for description of diagnostic groups). Comparisons were by pooled t tests in the case of equal variances and Cochran t tests in the case of unequal variances; all statistical tests were two-sided.

^†Time from last PSA test to censoring for those without pCA or time from diagnosis of pCA to death or censoring for those with pCA.