1. Number of cases lost to follow‐up.
| Study | Total participants | Total operations | Lost to FU at 30 days | Lost to FU at end | Number of exclusions | Cross‐over: patch to primary | Cross‐over: primary to patch | ||
| Patch angioplasty | Primary closure |
Patch angioplasty |
Primary closure | ||||||
| AbuRahma 1996 | 357 | 399 | 0 | 0 | 0 | 0 | 4 | 0 | 0 |
| Al‐Rawi 2006l | 315 | 328 | 0 | 0 | 7 | 8 | 10 | Data not available | Data not available |
| Eikelboom 1988 | 126 | 129 | 0 | 0 | 10 participants lost to Doppler FU but not clinical FU | 7 to Doppler FU but not clinical FU | 0 | 3 | 3 |
| İyigün 2019 | 137 | 137 | Data not available | Data not available | Data not available | Data not available | Data not available | Data not available | Data not available |
| Katz 1994 | 87 | 100 | 0 | 0 | 5 | 7 | 0 | 0 | 0 |
| Lord 1989 | 123 | 140 | 0 | 0 | 0 | 0 | 4 | Between 0 and 4 | Between 0 and 4 |
| Mannheim 2005 | 404 | 422 | 0 | 0 | Data not available | Data not available | Data not available | 0 | 0 |
| Myers 1994 | 136 (109 after exclusion of 27 people undergoing obligatory vein patching) | 152 (122 analysed, as 30 had obligatory vein patches) | 0 | 0 | 6 | 8 | 30 operations had obligatory vein patch closure and 16 participants had both sides done (total 46) | 0 | 0 |
| Pratesi 1986 | 90 | 100 | Data not available | Data not available | Data not available | Data not available | Data not available | Data not available | Data not available |
| Ranaboldo 1993 | 199 | 213 | 0 | 0 | 5 | 12 | 0 | 0 | 0 at 30‐day FU but 4 at 1‐year FU |
| De Vleeschauwer 1987 | 126 | 174 | 0 | 0 | Data not available | Data not available | 0 | 0 | 0 |
FU: follow‐up