Normative data for the Vietnamese smell identification test

The 12-item Vietnamese smell identification test (VSIT) has been developed to evaluate the olfactory function of the Vietnamese population. This study aimed to investigate the normative value of the VSIT in different age groups and sexes. This cross-sectional study was conducted at Ho Chi Minh University Medical Center, Vietnam. All participants were evaluated for odor identification ability using the VSIT.We included healthy participants aged 18 years or older with no history of olfactory disturbances. A total of 391 healthy volunteers were recruited with a mean age of 45.80 years (SD: 17.62; range: 18–86; female: 63.4 %). The tenth percentile of scores on the 0–12 VSIT scale was 8.3 in participants aged 18–29 years, 9.0 in 30–39 years, 8.0 in 40–49 years, 7.8 in 50–59 years, 7.9 in 60–69 years and 6.0 in over 70 years. Young adults (18–39 years old) had better olfactory identification ability than older adults (over 50 years), p