Retrospective Study of the Effects of Post-nasal Drip Symptoms on Cough Duration

• Published in: In vivo (Athens) Vol. 35; no. 3; pp. 1799 - 1803
• Main Authors: Nakajima, Takeo, Nagano, Tatsuya, Nishimura, Yoshihiro
• Format: Journal Article
• Language: English
• Published: Greece International Institute of Anticancer Research 01.05.2021
• Subjects: Allergic rhinitis; post-nasal drip symptom; cough-variant asthma and cough-predominant asthma
• ISSN: 0258-851X; 1791-7549
• DOI: 10.21873/invivo.12440

The aim of this study was to elucidate the significance of allergic rhinitis and post-nasal drip symptoms in patients with cough-variant and cough-predominant asthma. We conducted a retrospective analysis of 91 patients who had cough-variant or cough-predominant asthma and first visited the Nakajima Medical Clinic in Japan between June 2012 and July 2015. Post-nasal drip symptoms were reported in 58 (63.7%) patients. The patients with post-nasal drip symptoms (19.5±8.3 days) had a significantly longer time until cough disappearance than those without post-nasal drip symptoms (11.0±4.8 days) (p=0.000034). Multivariate analysis showed that post-nasal drip symptoms are independent prolonged factors of cough duration. Post-nasal drip symptoms may affect cough control in patients with cough-variant and cough-predominant asthma.