Table 1.

Subject characteristics

Esophageal adenocarcinomaCardia adenocarcinomaEsophageal squamous cellControls
No. subjects1011051442,800
Age at exam (y), mean (SD)44.7 (10.2)47.8 (11.9)49.4 (10.4)47.5 (11.0)
Race, n (%)
    White92 (91)90 (86)90 (63)2,186 (78)
    Black2 (2)7 (7)42 (29)363 (13)
    Asian4 (4)1 (1)7 (5)123 (4)
    Other3 (3)7 (7)5 (3)120 (4)
    Missing0 (0)0 (0)0 (0)8 (0)
Sex, n (%)
    Male88 (87)78 (74)95 (66)2,088 (75)
Smoking status, n (%)
    Ever smoked74 (77)76 (79)112 (84)1,682 (67)
    Current smokers45 (45)47 (45)82 (57)999 (36)
Current alcohol use, n (%)
    None13 (15)19 (20)23 (19)512 (16)
    3+ per day21 (21)22 (24)387 (39)302 (24)
BMI (kg/m2), mean (SD)26.7 (3.5)26.1 (3.6)24.4 (3.5)25.6 (3.8)
Abdominal* diameter (cm), mean (SD)24.0 (5.1)22.5 (3.9)22.5 (4.3)22.3 (4.1)
Abdominal/thigh ratio,* mean (SD)1.55 (0.33)1.52 (0.49)1.51 (0.31)1.46 (0.32)
Years between examination and cancer diagnosis, mean (SD)24.6 (8.6)22.5 (9.7)18.5 (0.8)NA
Reflux-type symptoms,* mean (SD)23 (46)14 (22.6)14 (18.2)243 (15.4)
  • NOTE: Percentages and means were calculated using subjects with responses for any given category; percentage and mean calculations did not incorporate subjects with missing values.

  • * Numbers and proportions are among subjects from 1965 to 1969 when these data were collected.