Table I.
Distribution of study subjects by demographic and risk factors
| Variablea | EA | ||
| Case (n = 335) | Control (n = 319) | P-value | |
| Age (years) (range) | 64 (31–91) | 57 (30–83) | <0.0001 |
| Sex | <0.0001 | ||
| Male (%) | 295 (88.1) | 181 (56.7) | |
| Female (%) | 40 (11.9) | 138 (43.3) | |
| Smoking | <0.0001 | ||
| Never (%) | 66 (19.7) | 112 (35.1) | |
| Ever (%) | 269 (80.3) | 207 (64.9) | |
| Body mass index at age 18 | 0.0003 | ||
| <25 (%) | 231 (69.0) | 261 (82.3) | |
| 25–29 (%) | 84 (25.0) | 47 (14.8) | |
| ≥30 (%) | 20 (6.0) | 9 (2.9) | |
| Alcohol intake | 0.35 | ||
| Never (%) | 26 (11.6) | 41 (18.7) | |
| Ever (%) | 199 (88.4) | 178 (81.3) | |
| Prior history of GERD | <0.0001 | ||
| No (%) | 143 (49.8) | 45 (65.2) | |
| Yes (%) | 144 (50.2) | 24 (34.8) | |
a
Number and percent of group (%). Percents are rounded.