| Secondary retraction reasons | N |
| Conflict of interest | 31 |
| Duplicate (submission by authors or editorial error) | 286 |
| Fabricated data | 229 |
| Falsified information | 39 |
| Fraudulent peer review | 350 |
| No data provided | 293 |
| No IRB approval | 134 |
| No patient consent | 22 |
| Publication without approval | 97 |
| Reproducibility | 180 |
| Research misconduct | 47 |
| Research outsourcing/templated | 22 |
| Other | 14 |