TABLE 6.
Top 20 author keywords with the highest frequency in FD research.
| Rank | Keywords | Count | Rank | Keywords | Count |
| 1 | H. pylori infection | 705 | 11 | Anxiety | 121 |
| 2 | IBS | 602 | 12 | Impaired glucose tolerance | 116 |
| 3 | GERD | 367 | 13 | Gastroparesis | 107 |
| 4 | Quality of life | 311 | 14 | Depression | 101 |
| 5 | Impaired gastric accommodation | 252 | 15 | Type 2 diabetes mellitus | 99 |
| 6 | Duodenal ulcer | 239 | 16 | Atrophic gastritis | 97 |
| 7 | PPIs | 207 | 17 | Gastric emptying | 94 |
| 8 | Epigastric pain | 186 | 18 | Prokinetic agents | 90 |
| 9 | Visceral hypersensitivity | 147 | 19 | Oxidative stress | 77 |
| 10 | Acupuncture | 135 | 20 | Inflammation | 76 |