Daily mood, shortness of breath, and lung function in asthma: Concurrent and prospective associations

The relationship between normal mood variations and lung function is highly variable across individuals and times of the day, limiting the predictive value of average group associations. Shortness of breath is predictive of future lung function decline in asthma. Future longitudinal research should focus on extreme emotional states, effort-independent measures of lung function, and additional indicators of asthma control.