Table 1

Distribution of participant characteristics by case/control status (159 cases, 297 controls)

VariableCases N (%)Controls N (%)
Sexa
 Male122 (77)223 (75)
 Female37 (23)74 (25)
Racea
 White152 (96)283 (95)
 Black6 (4)12 (4)
 Asian/Pacific islander1 (1)2 (1)
Enrollment yeara
 1985–198962 (39.0)121 (40.7)
 1990–199397 (61.0)176 (59.3)
Year of blood drawa
 1986–198924 (15.1)46 (15.5)
 1990–199268 (42.8)128 (43.1)
 1993–199667 (42.1)123 (41.4)
Exposure populationa
 Asbestos-exposed46 (29)91 (31)
 Smoker113 (71)206 (69)
Current smoker
 Yes104 (65)145 (49)b
 No55 (35)152 (51)
Age (mean years ± SD)a60.0 ± 5.659.9 ± 5.8
Pack-years (mean ± SD)58.7 ± 24.345.9 ± 22.0b
BMIc (mean ± SD)27.5 ± 4.628.1 ± 5.3
  • a Matching variables.

  • b P < 0.001.

  • c BMI, body mass index.