Health Services Utilization Is Increased in Poor Perceivers of Bronchoconstriction and Hyperinflation in Asthma.

Background: Impaired symptom perception is often listed as a risk factor for life-threatening asthma, but there is limited evidence to support this.

Objective: We aimed to determine whether impaired perception of bronchoconstriction (BC) and/or dynamic hyperinflation (DH) are risk factors for severe asthma exacerbations.

Methods: In this prospective cohort study, individuals with asthma underwent high-dose methacholine challenge testing.

Active transportation environments surrounding Canadian schools.

Objectives: Walking or cycling to school represents an opportunity for children to engage in physical activity. The study objectives were to: 1) describe active transportation policies, programs, and built environments of Canadian schools and their surrounding neighbourhoods, and 2) document variations based on urban-rural location and school type (primary vs. secondary vs.