Participants
The association between presence of distorted olfactory perception and
improvement of olfactory performance after OT was analysed in 246
subjects (106 men, 140 women, mean (±SD) age 58.7 ± 7.3 years).
Diagnosis included 153 postinfectious-, 31 posttraumatic-, and 62
idiopathic- related OD (Table 1 ). Olfactory training was
performed for a mean (±SD) period of 25.8±8 weeks. Although 292
participants were initially included in the study, the analysis was
performed on the basis of ‘listwise’ exclusion in case of missing
values, resulting in a total of 46 subjects being excluded from the
final analysis sample (n = 246).