6. Data table: patent ductus arteriosus.
| Study | Progesterone | Control | Comments | ||
| Events | Total | Events | Total | ||
| Rouse 2007 | 18 | 632 | 31 | 648 | ICC = 0.87 |
| Total | 18 | 632 | 31 | 648 | |
ICC: intracluster correlation co‐efficient
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