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Effects of tea drinking on auditory functions in aged subjects

Abstract

The purpose of this study was to investigate the effects of Oolong tea drinking on the auditory functions in aged subjects. Retrospective cohort study was conducted on 265 subjects who were older than 55 years old. Tea drinking was determined from responses to a medical and food consumption questionnaires. The effects of Oolong tea drinking on pure tone thresholds (PTAs) for peripheral hearing and pitch pattern sequence (PPS) scores for central hearing were analyzed. Results showed that, before adjusting for other factors, PTas were not significantly different between “non-tea drinkers” and “Oolong tea drinkes”. But, the mean PPS score was higher in the “Oolong tea drinkers” (74.5 ± 12.7 %) than in the “non-tea drinkers” (68.4 ± 13.9 %). after adjusting for age, gender, waist circumference, and other variables, Oolong tea drinking (coefficient (β) ± standard error (se) = 2.60 ± 0.67, P<0.001) was positively associated with PPs score, but not with PTAs, by multivariate linear regression analysis. in subgroup analysis for PPS score by gender, Oolong tea drinking showed a significant positive association with PPS score in males (β ± se=4.75 ± 0.95, P<0.001), but showed association of borderline significance with PPS score in females (β ± se=1.57 ± 0.94, P=0.097), with adjustment of other risk factors. in conclusion, Oolong tea drinking was associated with better central auditory function, but not with peripheral hearing thresholds, especially in male aged subjects.

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Abbreviations

aRHi:

age-related hearing impairment

dB HL:

decibel hearing level

PPs:

pitch pattern sequence

PTa-high:

average pure tone hearing level of high frequencies

PTa-low:

average pure tone hearing level of low frequencies

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Correspondence to T. C. Liu or J. C. Chen.

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Hwang, J.H., Chan, Y.C., Hsu, C.J. et al. Effects of tea drinking on auditory functions in aged subjects. J Nutr Health Aging 16, 252–256 (2012). https://doi.org/10.1007/s12603-011-0078-5

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  • DOI: https://doi.org/10.1007/s12603-011-0078-5

key words

  • Oolong tea
  • pure tone average
  • central auditory function
  • humans