Table 1.
Demographic and Physiologic Characteristics of the Study Population (n = 1659)
| Mean age (SD) | 51.4 (14.2) |
| Mean BMI (SD) | 27.7 (5.4) |
| Sex | |
| Male | 824 (50.3%) |
| Female | 835 (49.7%) |
| BMI categories | |
| Underweight (%) | 16 (1.0%) |
| Normal (%) | 530 (32.0%) |
| Overweight (%) | 640 (38.6%) |
| Obese (%) | 473 (28.5%) |
| LES status | |
| Defective (%) | 776 (46.8%) |
| Normal (%) | 883 (53.2%) |
| Hiatal hernia | |
| Present | 715 (43.1%) |
| Absent | 944 (56.9%) |
| Esophageal pH monitoring componentsa | |
| % Total time | 8.1 (13.0) |
| % Upright time | 9.4 (28.9) |
| % Supine time | 6.7 (14.1) |
| Number of episodes | 99 (116) |
| Number of episodes >5 min | 3.8 (5.6) |
| Longest episode (min) | 17.1 (25.9) |
| % Post prandial time | 11.7 (14.9) |
| Composite pH score | 30.4 (39.1) |
aMean (SD)