RESULTS
Of the 221 contacted patients, initially only 101 returned the
questionnaire (response rate 45.7%). Patients who did not respond to
the first attempt, were contacted again. This resulted in a rather
disappointing 15 extra responders (final response rate 52.5%). Of 116
patients who filled out the questionnaire, 15 underwent a bilateral
intervention or had – during follow-up – undergone more than 1
sialendoscopic intervention. A questionnaire was filled out for each
procedure that was performed. This resulted in 146 long-term evaluable
sialendoscopies of the total of 272 that were carried out during the
study period.