Table 1 Characteristics of study groups
Barrett’s oesophagus casesGORD controlsPopulation controls
Number or mean (% or SD)Number or mean (% or SD)Number or mean (% or SD)
Number of subjects318312299
Age (years)
    20–399 (3)12 (4)9 (3)
    40–59120 (38)113 (36)101 (34)
    60–79189 (59)187 (60)189 (63)
Race
    White276 (87)250 (80)254 (85)
    Black4 (1)20 (6)16 (5)
    Hispanic25 (8)20 (6)11 (4)
    Asian3 (1)7 (2)8 (3)
    Others8 (3)13 (4)9 (3)
    Unknown2 (1)2 (1)1 (0)
Gender
    Male232 (73)215 (69)206 (69)
Smoking status (ever smoked)210 (66)184 (59)164 (55)
GORD
    Any GORD297 (93)293 (94)180 (60)
    At least weekly256 (81)230 (74)84 (28)
Mean body mass index (kg/m2)29.5 (6.1)28.8 (5.3)29.5 (5.8)
  • Eligible Barrett’s oesophagus cases were frequency matched to control groups by gender, age (by 5 year age groups) and centre of diagnosis.

  • GORD, gastro-oesophageal reflux disease.