Table 1– Distribution of selected participant characteristics at enrolment in 1982, American Cancer Society Cancer Prevention Study-II
CharacteristicsSubjectsRadon Bq·m−3
Overall811961 (100)53.5±38.0
Age at enrolment yrs
 <4037262 (4.6)50.1±35.4
 40–49173768 (21.4)54.0±37.9
 50–59297108 (36.6)54.2±38.5
 60–69213231 (26.3)53.1±38.0
 70–7976633 (9.4)52.4±37.5
 ≥8013959 (1.7)51.9±36.9
Race
 White770352 (94.9)54.2±38.2
 Black29832 (3.7)40.2±28.3
 Other11777 (1.5)39.3±32.1
Sex
 Male362600 (44.7)53.8±38.2
 Female449361 (55.3)53.2±37.8
Education
 Less than HS106668 (13.1)55.2±38.9
 HS262853 (32.4)56.8±39.5
 More than HS442440 (54.5)51.1±36.6
BMI kg·m−2
 <18.513685 (1.7)50.3±36.1
 18.5–24.9402003 (49.5)52.2±37.2
 25.0–29.9299755 (36.9)54.6±38.6
 ≥30.096518 (11.9)55.6±39.1
Marital Status
 Single25564 (3.2)51.7±36.7
 Married691267 (85.1)54.1±38.2
 Other95130 (11.7)49.7±36.0
Cigarette smoking status
 Never375087 (46.2)55.5±39.0
 Current152033 (18.7)51.5±36.4
 Former203253 (25.0)51.2±36.9
 Pipe/cigar only81588 (10.1)53.4±37.9
Region
 Northeast170281 (21.0)58.3±42.3
 South257243 (31.7)35.6±21.7
 Midwest234952 (28.9)73.7±36.6
 West149485 (18.4)46.9±40.3
  • Data are presented as n (%) or mean±sd. HS: high school; BMI: body mass index. Radon data was obtained from the Lawrence Berkeley National Laboratory (Berkeley, CA, USA).