Sex-related Differences in Cough Reflex Sensitivity in Patients with Chronic Cough
| Autor: | I. Aziz, Alyn H. Morice, Jack A Kastelik, Rachel Thompson, Josephine C Ojoo, Anthony E. Redington |
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| Rok vydání: | 2002 |
| Předmět: |
Adult
Male Pulmonary and Respiratory Medicine Spirometry Cough reflex Critical Care and Intensive Care Medicine Sensitivity and Specificity Bronchial Provocation Tests Citric Acid chemistry.chemical_compound Sex Factors Interquartile range Forced Expiratory Volume Reflex Humans Medicine Aged Inhalation medicine.diagnostic_test business.industry Respiratory disease Reproducibility of Results Middle Aged medicine.disease Asthma Chronic cough Cough chemistry Capsaicin Anesthesia Chronic Disease Gastroesophageal Reflux Female medicine.symptom business Follow-Up Studies |
| Zdroj: | American Journal of Respiratory and Critical Care Medicine. 166:961-964 |
| ISSN: | 1535-4970 1073-449X |
| DOI: | 10.1164/rccm.2109061 |
| Popis: | Among patients attending specialist cough clinics there is an excess of females, but the reason for this sex difference is unknown. We tested the hypothesis that the sensitivity of the cough reflex is greater in female compared with male patients with chronic cough. Inhalation cough challenges with capsaicin and citric acid were performed in a large group of patients with chronic cough. The concentrations of tussive agent causing two (C2) and five (C5) coughs were calculated. Measurements of capsaicin cough reflex sensitivity (median [interquartile range]) were significantly lower for female patients compared with male patients (C2: 1.9 [0.5 to 5.5] versus 5.3 [2.2 to 11.5] micro M, p = 0.0026; C5: 8.6 [2.2 to 34.0] versus 51.2 [7.2 to > 100] micro M, p = 0.0007). Similarly for citric acid challenge, values were significantly lower for female compared with male patients (C2: 53.5 [17.3 to 145.4] versus 118.1 [41.4 to 381.7] mM, p = 0.0064; C5: 300.0 [97.1 to > 1,000] versus 830.4 [300.0 to > 1,000] mM, p = 0.032). There were significant correlations between capsaicin and citric acid C2 values (r(s) = 0.54, p < 0.0001) and C5 values (r(s) = 0.57, p < 0.0001). These findings indicate a sex difference in cough sensitivity in patients with chronic cough, as previously reported in healthy volunteers. This may explain the female preponderance in cough clinics. |
| Databáze: | OpenAIRE |
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