Table 2: Reasons for not attending the full long-term follow-up.

Reasons	Number of patients
Living in other counties	27
High age or bad health	6*
Deceased	9
Declined follow-up.	12#
Unknown reason	30
Repeat surgery due to new/residual incompetence	5**

*1 declined CDU but responded to questionnaires.

#6 declined the CDU but responded to questionnaires.

**3 followed until re-do surgery and one full time after clearing a residual incompetent perforator.