This study examines University of Pennsylvania Smell Identification Test (UPSIT; R. L. Doty, 1995) performance in 133 controls and 54 chronic, medicated outpatients with schizophrenia (SZ) using item-response theory modeling. Results show that UPSIT items contribute to 1 factor, cover a range of 8 standard errors of measurement, and articulate 3 ability levels. Although it is not difficult enou...

CONTEXT Mild cognitive impairment (MCI) is often a precursor to Alzheimer disease, but knowledge about factors that predict its development is limited. OBJECTIVE To test the hypothesis that impaired odor identification is related to increased risk of incident MCI. DESIGN Longitudinal cohort study. SETTING Academic research. PARTICIPANTS Subjects were 589 community-dwelling older persons...

Olfactory dysfunctions in patients with schizophrenia are becoming the aim of an increased number of studies. Smell identification deficits are well known but also other olfactory processes are examined, eg. sensitivity, discrimination, familiarity and edibility. Smell identification deficits are present in patients with schizophrenia and also in their non-psychotic siblings. Moreover, this dys...

using a 40-odorant test, the odor identification ability of a large number of persons for whom complete smoking histories were available. As indicated herein, the results of this study reveal a clear adverse effect of cigarette smoking on olfactory function that is dose related and present in past smokers. This effect is reversible, at least to some degree, and the time course of this reversibi...

Click here to view the Brief Report by J. R. Lechien et al We read interesting article published al. [1 about recovery of olfactory dysfunction (OD) in patients with COVID-19. Despite encoring results, we would like highlight some confusing concepts and terms. The proper use them ensure comparable results future papers. Hence, this letter aims clarify inaccurate definitions used smell terminolo...

Bright light therapy has been shown to have a positive impact on seasonal affective disorder (SAD), depression and anxiety. Smell has also has been shown to have effects on mood, stress, anxiety and depression. The objective of this study was to investigate the effect of the combination of light and smell in a non-adaptive cycle. Human subjects were given smell (lemon, lavender or peppermint) a...

INTRODUCTION Sniffin' Sticks Test (SST) is a complex smell test, enabling the diagnosis of various aspects of olfactory sensitivity. It is one of the most popular tools for olfactory testing all over the world; however, so far it has not been commonly used in Poland. AIM The presented study had the following aims: assessment of the applicability of the SST in Poland, adaptation of the identif...

The 40-item University of Pennsylvania Smell Identification Test (UPSIT) is the most widely used smell test in the world. Presently, culturally modified versions of this test are available in multiple languages. A traditional Chinese version of the UPSIT (UPSIT-TC) has been developed for administration in Taiwan. The purpose of this study was to investigate the validity and reliability of the U...