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Baseline data of the patients
| Variable | Overall(n = 1160) |
|---|---|
| Sex | |
| man | 658(56.7%) |
| female | 502(42.3%) |
| Age(years) | 63.2 ± 26.5 |
| GERD | |
| No | 331(28.5%) |
| NERD | 383(33.0%) |
| RE | 446(38.4%) |
| Hill classification | |
| Grade I | 411 (35.8%) |
| Grade II | 152 (13.4%) |
| Grade III | 318 (27.8%) |
| Grade IV | 262(22.9%) |
