T V K Herregods1, A Pauwels2, J Tack2, A J P M Smout1, A J Bredenoord1. 1. Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands. 2. Translational Research Center for Gastrointestinal Disorders, University Hospital Gasthuisberg, University of Leuven, Leuven, Belgium.
Abstract
BACKGROUND: Gastro-esophageal reflux can be the cause of chronic cough. In the assessment of the temporal association between reflux and cough, previous studies have used a two-minute time window, based on studies in patients with heartburn. However, it remains unclear whether the optimal time window duration for the evaluation of reflux-induced cough is two minutes as well. Therefore, we aimed to determine whether a two-minute time window is optimal to diagnose reflux-induced cough. METHODS: In this multicenter study, 137 patients with chronic cough were evaluated using 24-h pH-impedance-pressure monitoring. Repetitive symptom association analysis was employed using an array of time windows of various duration. For each time window, the symptom association probability (SAP) and symptom index (SI) were calculated. KEY RESULTS: A total of 4377 cough burst episodes and 5074 reflux episodes were detected. The number of patients with a positive SAP increased with increasing window duration until a plateau was reached around a time window duration of 1.5 min. Similarly, the SI increased steeply until a window duration of about 2 min, after which a linear increase was seen. CONCLUSIONS AND INFERENCES: A two-minute time window seems appropriate for evaluation of the relationship between reflux and chronic cough using 24-h pH-impedance-pressure monitoring. A time window duration of 30 s or 1 min is too short to diagnose patients with reflux-induced cough accurately.
BACKGROUND: Gastro-esophageal reflux can be the cause of chronic cough. In the assessment of the temporal association between reflux and cough, previous studies have used a two-minute time window, based on studies in patients with heartburn. However, it remains unclear whether the optimal time window duration for the evaluation of reflux-induced cough is two minutes as well. Therefore, we aimed to determine whether a two-minute time window is optimal to diagnose reflux-induced cough. METHODS: In this multicenter study, 137 patients with chronic cough were evaluated using 24-h pH-impedance-pressure monitoring. Repetitive symptom association analysis was employed using an array of time windows of various duration. For each time window, the symptom association probability (SAP) and symptom index (SI) were calculated. KEY RESULTS: A total of 4377 cough burst episodes and 5074 reflux episodes were detected. The number of patients with a positive SAP increased with increasing window duration until a plateau was reached around a time window duration of 1.5 min. Similarly, the SI increased steeply until a window duration of about 2 min, after which a linear increase was seen. CONCLUSIONS AND INFERENCES: A two-minute time window seems appropriate for evaluation of the relationship between reflux and chronic cough using 24-h pH-impedance-pressure monitoring. A time window duration of 30 s or 1 min is too short to diagnose patients with reflux-induced cough accurately.
Authors: C Prakash Gyawali; Peter J Kahrilas; Edoardo Savarino; Frank Zerbib; Francois Mion; André J P M Smout; Michael Vaezi; Daniel Sifrim; Mark R Fox; Marcelo F Vela; Radu Tutuian; Jan Tack; Albert J Bredenoord; John Pandolfino; Sabine Roman Journal: Gut Date: 2018-02-03 Impact factor: 23.059
Authors: H Badri; I Satia; V Bansal; M A Mangi; A Tangaroonsanti; K R DeVault; A S Lee; L A Houghton; J A Smith Journal: Lung Date: 2021-11-19 Impact factor: 2.584
Authors: Philip W Rouadi; Samar A Idriss; Jean Bousquet; Tanya M Laidlaw; Cecilio R Azar; Mona S Al-Ahmad; Anahi Yañez; Maryam Ali Y Al-Nesf; Talal M Nsouli; Sami L Bahna; Eliane Abou-Jaoude; Fares H Zaitoun; Usamah M Hadi; Peter W Hellings; Glenis K Scadding; Peter K Smith; Mario Morais-Almeida; René Maximiliano Gómez; Sandra N Gonzalez Diaz; Ludger Klimek; Georges S Juvelekian; Moussa A Riachy; Giorgio Walter Canonica; David Peden; Gary W K Wong; James Sublett; Jonathan A Bernstein; Lianglu Wang; Luciana K Tanno; Manana Chikhladze; Michael Levin; Yoon-Seok Chang; Bryan L Martin; Luis Caraballo; Adnan Custovic; Jose Antonio Ortega-Martell; Erika Jensen-Jarolim; Motohiro Ebisawa; Alessandro Fiocchi; Ignacio J Ansotegui Journal: World Allergy Organ J Date: 2021-11-22 Impact factor: 4.084