Clinical Usefulness of Smell Identification Test Card: Open Essence

Combinations of two odorants of smell identification test for screening of olfactory impairment

“…Nishida et al [9] reported that the full Open Essence test (12 odorants) takes about 5 min to conduct both in patients with olfactory impairment and in healthy volunteers. Therefore, to reduce the total screening time, instead of using the full 12 cards of the Open Essence test package, examiners could instead use combinations of two odorants of the OSIT-J.…”

“…1) uses 12 odorants that are familiar to Japanese people [8,9]. These odorants are described as condensed milk, cooking gas, curry, cypress wood (Japanese cypress, hinoki), India ink, Japanese orange (mikan), menthol, perfume, roasted garlic, rose, sweaty-smelling clothes, and wood.…”

“…1). Subjects and experimenters reported the Open Essence test to be easier, shorter, more interesting, and more convenient to conduct than the OSIT-J [9]. In Japanese subjects, the scores from Objective: To determine whether combinations of two odorants of the Open Essence smell identification test can be used to screen for olfactory impairment in Japanese people.…”

“…the Open Essence test are significantly correlated with the odor recognition threshold obtained by using the T&T olfactometer threshold test [8,9]. Here, we assess the odorants used in the Open Essence test for their usefulness in screening for olfactory impairment in Japanese subjects.…”

“…The Open Essence smell identification test (Wako, Japan) was developed to address the deficiencies of the OSIT-J [8,9]. Both the Open Essence test and the OSIT-J use the same 12 odorants and a four-plus alternative forced-choice paradigm; however, the Open Essence test is suitable for self-reporting because the odorants are contained within simple, sealed test cards rather than in sticks (Fig.…”