Table 1.
Characteristics of the study population, men aged 40-80 years seeking care at two US healthcare systems, 2000-2014
| Variable | Total populationa | Among men with ≥1 PSA test from 2000-2014 |
|---|---|---|
| Total eligible men, N (%) | 253,139 | 134,870 |
| Meyers Primary Care Institute | 152,112 | 70,055 |
| Henry Ford Health System | 101,027 | 64,815 |
| Age in yearsb | ||
| 40-54 | 166,067 (66%) | 68,646 (51%) |
| 55-69 | 66,860 (26%) | 50,026 (37%) |
| 70-80 | 20,212 (8%) | 16,198 (12%) |
| Racec | ||
| Black | 29,556 (12%) | 19,556 (14%) |
| White | 84,149 (33%) | 56,603 (42%) |
| Other | 7,213 (3%) | 4,384 (3%) |
| Unknown | 132,221 (52%) | 54,327 (40%) |
| Family history of prostate cancerd | ||
| Yes | 2,098 (1%) | 1,978 (1.5%) |
| Mean time between first 2 PSA tests, dayse | 439 | |
a
All men aged 40-80 enrolled in participating health systems for at least one day between January 2000 and December 2014, and who did not have a personal history of prostate cancer.
b
Age at beginning of study period or at enrollment in the health system during the study period.
c
Self-reported race.
d
Family history of prostate cancer defined as at least one occurrence of ICD-9 code V16.42 in claims data.
e
N = 129,090 men.