Table 2.

Characteristics of study participants at first blood draw by cancer status

Cancer-freeIncident cancer
Mean ± SD/n (%)Mean ± SD/n (%)P
N354121
Age, years72.2 ± 6.970.6 ± 6.40.02a
BMI, kg/m228.3±4.228.2 ± 4.00.85
Smoking status
 Never94 (26.6%)37 (30.6%)0.68
 Current17 (4.8%)6 (5.0%)
 Former243 (68.6%)78 (64.5%)
Pack-years of smoking20.5 ± 24.221.7 ± 24.30.76
Average alcohol consumption
 0–1 drinks/day288 (81.4%)102 (84.3%)0.47
 2+ drinks/day66 (18.6%)19 (15.7%)
Education, years
 High School grad or less105 (29.1%)24 (19.8%)0.22
 Some college/college grad168 (47.5%)66 (54.6%)
 Any professional/graduate school83 (23.5%)31 (25.6%)
Leukocyte telomere length1.29 ± 0.491.32 ± 0.510.71
  • aStatistically significant at P < 0.05.