Table 1.
General characteristics of the included studies.
| Number | Percentage | |
|---|---|---|
| Total | 1706 | 100% |
| Length of study time | ||
| 0 <L≤6m | 816 | 47.8% |
| 6m<L≤12m | 443 | 26.0% |
| 12m<L≤18m | 154 | 9.0% |
| L>18m | 274 | 16.1% |
| NA | 19 | 1.1% |
| Study type | ||
| Interventional | 943 | 55.3% |
| Observational | 600 | 35.2% |
| Diagnostic Test | 145 | 8.5% |
| Expanded Access | 18 | 1.1% |
| Recruitment status | ||
| Recruiting | 922 | 54.0% |
| Not yet recruiting | 683 | 40.0% |
| Completed | 82 | 4.8% |
| Terminated/Withdrawn | 12 | 0.7% |
| Suspended | 7 | 0.4% |
| Enrollment | ||
| <100 | 638 | 37.4% |
| 100–499 | 617 | 36.2% |
| 500–999 | 111 | 6.5% |
| ≥1000 | 322 | 18.9% |
| NA | 18 | 1.1% |
| Sex/Gender | ||
| Both | 1662 | 97.4% |
| Only female | 35 | 2.1% |
| Only male | 7 | 0.4% |
| NA | 2 | 0.1% |
| Ages | ||
| Child | 20 | 1.2% |
| Adult | 1417 | 83.1% |
| Child and Adult | 269 | 15.8% |
NA, Not available. Child means a person under the age of 18.