The association between objectively measured physical activity and morning symptoms in COPD

The primary objective of the Morning symptoms in-Depth observAtional Study (MODAS) was to assess the severity of morning symptoms in different Global Initiative for Obstructive Lung Disease (GOLD) stages. The secondary objective was to evaluate the association between dyspnea severity, health status, airflow limitation, lung hyperinflation, anxiety and depression, inflammatory parameters, exacerbations, objectively measured physical activity parameters and morning symptom severity.