ObjectiveTo explore the effect of aging on the parameters of the caloric test via analyzing the difference of the mean values of maximum slow phase velocity (maxSPV) in patients with vertigo in different age groups.MethodsTwo hundred and twentyeight patients, aged from 14 to 88 years old, who were admitted to the vertigo clinic of Beijing Geriatric Hospital from March 2015 to Nov 2018, were prospectively collected. All patients were divided into 3 groups: group A (below 60 years), group B (60 to 79 years), and group C (over 80 years). The mean values of maxSPV in the caloric test among the three groups were analyzed by SPSS 17.0 statistical software.ResultsThe differences of the mean values of maxSPV among the three groups were statistically significant (F=3.203, P=0.042). There was no significant difference between group A and group B (P=0.567), while the difference between group C and group A and that between group B and group C were both statistically significant (P=0.037, P=0.013).ConclusionThe mean value of maxSPV in the caloric test shows a significant decline only in elderly patients, which indicates that aging may affect the caloric test in patients with vertigo.