Chemical Senses Vol. 29 No. 7 © Oxford University Press
2004; all rights reserved
Usefulness of the Odor Stick Identification Test for Japanese Patients with Olfactory Dysfunction
1 Department of Otorhinolaryngology, Hyogo College of Medicine, Nishinomiya City, Hyogo 663-8501, Japan, 2 Department of Otorhinolaryngology, Meiwa Hospital, 4-31 Agenaruo-cho, Nishinomiya-city, Hyogo 663-8186, Japan, 3 Department of Otorhinolaryngology, Hyogo Prefectural Kaibara Hospital, 1-5208 Kaibara, Kaibara-cho, Hikami-gunn, Hyogo 669-3395, Japan, 4 National Institute of Advanced Industrial Science and Technology, Neuroscience Research Institute, Central 6, 1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan and 5 Takasago International Corporation, Japan, Nissei Aroma Square 17F, 5-37-1 Kamata, Ota-ku, Tokyo 144-8721, Japan
Correspondence to be sent to: Yoshiteru Hashimoto, Department of Otolaryngology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya City, Hyogo 663-8501, Japan. e-mail: y-h-1975{at}hyo-med.ac.jp
The odor stick identification test (OSIT) is a new test of olfactory function recently developed for Japanese people. The purpose of the present study was to evaluate this test in relation to T&T olfactometry and the cross-cultural smell identification test (CC-SIT) by applying to 110 Japanese patients with olfactory disturbance. The averaged recognition thresholds for five odorants in T&T olfactometry, the number of correct answers in the CC-SIT and the rates of identification of 13 odorants in the OSIT were compared. The visual analogue scale (VAS) was also used to evaluate symptoms. The rate of identification of OSIT showed high and significant correlation coefficients with the averaged recognition thresholds of T&T olfactometry (–0.766, P < 0.001), with the number of correct answers in CC-SIT (0.754, P < 0.001) and with the VAS score (0.591, P < 0.001). In addition, on the identification performance measured by OSIT, we found significant differences between all pairs of four degrees of olfactory dysfunction except for one pair. Thus, we conclude that OSIT is useful for evaluating olfactory dysfunction in Japanese people.
Key words: cross-cultural smell identification test, odor stick identification test, olfactory disturbance, T&, T olfactometry, visual analogue scale
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