Sentences with phrase «bronchial hyperreactivity»

One study found a five-fold increase in bronchial hyperreactivity in people with the lowest intake of vitamin C.

Our finding of sinusitis, bronchial hyperreactivity, and bronchial responsiveness in firefighters with World Trade Center cough is important but not surprising.17 - 20 An unexpected finding was that 87 percent of such firefighters reported symptoms of gastroesophageal reflux disease; such symptoms are generally reported by less than 25 percent of patients with chronic cough.1, 21,22 Despite the strong associations between gastroesophageal reflux disease and chronic cough17 - 20 and between gastroesophageal reflux disease and asthma,23 - 25 it remains unclear whether gastroesophageal reflux disease causes either condition.26 The causative mechanism may be repeated aspiration of minute amounts of refluxed material; vagally mediated esophageal, tracheobronchial, or laryngobronchial cough reflexes; or neurally mediated bronchial inflammation.23, 24,26 Involvement of the posterior nasopharynx is common in patients with gastroesophageal reflux disease, 27 whereas bronchial hyperreactivity may not be present.25, 26 For these reasons, we classified gastroesophageal reflux disease as an upper - airway symptom (Figure 2).

There was a significant association between the level of exposure and bronchial hyperreactivity: firefighters with a high level of exposure were more likely to have hyperreactivity than were those with a moderate level of exposure (relative risk, 21.0; 95 percent confidence interval, 1.8 to 164; P = 0.01).