Laryngopharyngeal reflux in war-torn Syria and its association with smoking and other risks: an online cross-sectional population study.

War, smoking, asthma, allergies, respiratory conditions and having a job were associated with LPR symptoms. However, they may be associated with these symptoms independently from LPR; for instance, similar symptoms can be caused by the mental disorders from war, the unique environment and irritant substances of the laryngeal mucosa.