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. 2001 Jan;109(1):15–19. doi: 10.1289/ehp.0110915

The influence of sex, allergic rhinitis, and test system on nasal sensitivity to airborne irritants: a pilot study.

D Shusterman 1, M A Murphy 1, J Balmes 1
PMCID: PMC1242045  PMID: 11171519

Abstract

"Nasal irritant sensitivity" is an important construct in environmental health science; functional measures, however, lack standardization. We performed duplicate measures of nasal irritant perceptual acuity on 16 subjects (evenly divided by sex and seasonal allergy status) using two different test compounds: carbon dioxide (CO2) (detection) and n-propanol (localization). The a priori hypotheses included a) allergic rhinitics will display lower perceptual thresholds than nonrhinitics; b) females will display lower perceptual thresholds than males; and c) estimates of perceptual acuity using the two test systems will be positively correlated. We obtained CO2 detection thresholds using an ascending concentration series, presenting 3-sec pulses of CO2, paired with air in random order, by nasal cannula. We obtained localization thresholds by simultaneously presenting stimuli (ascending concentrations of n-propanol vapor in air) and blanks (saturated water vapor in air) to opposite nostrils, with laterality randomized. In terms of test-retest reliability, individual replicate measures for CO2 detection thresholds correlated more closely than did the localization thresholds of volatile organic compounds (VOC) (r = 0.65 and r = 0.60, respectively). As an intertest comparison, log-transformed individual mean CO2 and VOC measures were positively correlated with an r of 0.63 (p < 0.01). In univariate analyses, sex predicted both log-transformed CO2 and VOC thresholds (females being more "sensitive"; p < 0.05 and 0.001, respectively). Nasal allergies predicted sensory testing results only in the multivariate analysis, and then only for VOC localization (p < 0.05). The question of population variation in nasal irritant sensitivity (as well as the generalizability of results across test compounds) deserves further attention.

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Selected References

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