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Analysis of trial publication cycles (duration).
| Time to publication (start date to publication date), years | Published trials (N=556), n (%) | Cumulative nonpublication rate (N=556), % |
| 2 | 108 (19.4%) | 80.6 |
| 4 | 148 (26.6%) | 54 |
| 6 | 100 (18%) | 36 |
| 8 | 37 (6.7%) | 29.3 |
| 10 | 9 (1.6%) | 27.7 |
| <15 | 3 (1%) | 27.2 |
