Table 1.

Characteristics of study subjects by health status

Total analytic populationParticipants without chronic disease at baselinea
Characteristic (No. %)Cohort (N = 61,098)Incident cancer cases (N = 2,240)Cohort (N = 25,509)Incident cancer cases (N = 810)
Age (median, IQR, y)50 (11)54 (11)47 (10)52 (10)
Male sex24,613 (40.3)1,018 (45.4)12,044 (47.2)433 (53.5)
Race
 White16,502 (27.0)529 (23.6)7,641 (30.0)206 (25.4)
 African American42,149 (69.0)1,645 (73.4)16,753 (65.7)573 (70.7)
 Otherb2,447 (4.0)66 (2.9)1,115 (4.4)31 (3.8)
Enrollment source
 Community Health Center52,855 (89.8)2,005 (89.5)22,377 (87.7)701 (86.5)
 General population6,003 (10.2)235 (10.5)3,132 (12.3)109 (13.5)
Family history of cancerc28,413 (46.5)1,148 (51.3)11,374 (44.6)419 (51.7)
Health insured34,841 (57.0)1,381 (61.7)13,353 (52.3)450 (55.6)
Education
 <High school16,987 (27.8)740 (33.0)5,981 (23.4)220 (27.2)
 High school20,716 (33.9)713 (31.8)8,790 (34.5)267 (33.0)
 >High school23,215 (38.0)778 (34.7)10,653 (41.8)318 (39.3)
Income ($)
 <15,00032,927 (53.9)1,317 (58.8)12,727 (49.9)437 (54.0)
 15,000–49,99921,894 (35.8)718 (32.1)9,445 (37.0)273 (33.7)
 ≥50,0005,535 (9.1)180 (8.0)3,030 (11.9)90 (11.1)
Marital Status
 Married20,960 (34.3)767 (34.2)8,820 (34.6)278 (34.3)
 Divorced20,513 (33.6)780 (34.8)8,403 (32.9)279 (34.4)
 Widowed5,303 (8.7)275 (12.3)1,391 (5.5)79 (9.8)
 Single14,039 (23.0)406 (18.1)6,763 (26.5)170 (21.0)
Postmenopausal therapy used10,071 (27.6)341 (27.9)3,169 (23.5)98 (26.0)
COPD diagnosis at baseline4,684 (7.7)213 (9.5)
Diabetes diagnosis at baseline11,472 (18.8)444 (19.8)
Hypertension diagnosis at baseline31,200 (51.1)1,252 (55.9)
  • NOTE: Subjects with missing data not included in this analysis.

  • Abbreviations: IQR, interquartile range; COPD, chronic obstructive pulmonary disease.

  • aIncludes participants without a diagnosis of COPD, diabetes, or hypertension at baseline.

  • bOther race includes participants who did not self-identify as non-Hispanic African American or non-Hispanic white.

  • cParticipants reported their mother, father, sister, or brother was diagnosed with cancer before baseline.

  • dFrequency among women.