Factors associated with knowledge of self-management of worsening asthma in primary care patients: a cross-sectional study.

Self-reported knowledge of self-management procedures was associated with a higher educational level, physician continuity, a written action plan, advanced treatment and, in women, visiting an asthma/COPD nurse. The results reinforce the importance of implementing guidelines of patient access to a specific physician, a written action plan, and structured education by an asthma/COPD nurse.