Figure 1.
Figure 2.
Similarity indices for research and review articles_
| Fields | No. papers | Mean ± SD | Mann-Whitney (P) | ||
|---|---|---|---|---|---|
| Research | Review | Research | Review | ||
| Basic Medicine | 228 (86.04%) | 37 (13.96%) | 7.18 ± 8.23% | 8.28 ± 6.52% | 0.123 |
| Health Management | 524 (49.11%) | 543 (50.89%) | 7.08 ± 6.12% | 9.87 ± 10.67% | 0.000 |
| Pharmacology & Pharmacy | 143 (100.00%) | 0 (0.00%) | 8.67 ± 5.92% | ——— | ——— |
| Public Health & Preventive Medicine | 933 (93.86%) | 61 (6.14%) | 7.47 ± 5.80% | 9.84 ± 8.32% | 0.037 |
| Total | 1,828 (74.04%) | 641 (25.96%) | 7.41 ± 6.26% | 9.77 ± 10.28% | 0.000 |
Similarity index for Chinese journal papers in four fields_
| Field | No. papers | Mean corrected general similarity index ± SD (P value) |
|---|---|---|
| Basic Medicine | 265 | 7.33 ± 8.00%** (0.009) |
| Health Management | 1,067 | 8.50 ± 8.85% (0.509) |
| Pharmacology & Pharmacy | 143 | 8.67 ± 5.92% |
| Public Health & Preventive Medicine | 994 | 7.61 ± 6.00%* (0.032) |
| Total | 2,469 | 8.03 ± 7.58% (0.003) |
Sections with duplication of papers in four fields_
| Fields | Sections containing duplication | ||
|---|---|---|---|
| Introduction/background | Data/methods | Results/discussion | |
| Basic Medicine | 16 (94.12%) | 13 (76.47%) | 16 (94.12%) |
| Health Management | 65 (83.33%) | 18 (23.08%) | 78 (100.00%) |
| Pharmacology & Pharmacy | 8 (80.00%) | 10 (100.00%) | 7 (70.00%) |
| Public Health & Preventive Medicine | 32 (84.21%) | 29 (76.32%) | 36 (94.74%) |
| Total | 121 (84.62%) | 70 (48.95%) | 137 (95.80%) |
Distribution of sections with duplication in papers with similarity index ≥ 15% according to field_
| Field | Plagiarism in a single section | Plagiarism in multiple sections | Total |
|---|---|---|---|
| Basic Medicine | 0 (0.00%) | 17 (100.00%) | 17 |
| Health Management | 11 (14.10%) | 67 (85.90%) | 78 |
| Pharmacology & Pharmacy | 1 (10.00%) | 9 (90.00%) | 10 |
| Public Health & Preventive Medicine | 2 (5.26%) | 36 (94.74%) | 38 |
| Total | 14 (9.79%) | 129 (90.21%) | 143 |
Similarity indices according to field_
| Field | No. papers | No. papers with similarity indices in each range | |
|---|---|---|---|
| < 15% | ≥ 15% | ||
| Basic Medicine | 265 | 248 (93.59%) | 17 (6.42%) |
| Health Management | 1,067 | 989 (92.69%) | 78 (7.31%) |
| Pharmacology & Pharmacy | 143 | 133 (93.01%) | 10 (6.99%) |
| Public Health & Preventive Medicine | 994 | 956 (96.18%) | 38 (3.82%) |
| Total | 2,469 | 2,326 (94.21%) | 143 (5.71%) |