Table of Contents

Executive summary.
Major issues in understanding asthma.
Methodological considerations in evaluating the evidence.
Patterns of asthma morbidity and mortality.
Pathophysiological basis of asthma.
Indoor biologic exposures.
Indoor chemical exposures.
Exposure to environmental tobacco smoke.
Indoor dampness and asthma.
Asthma and nonresidential indoor environments.
Impact of ventilation and air cleaning on asthma.
Summary of research.
Recommendations and overall conclusions.
Appendix A: Theoretical considerations relevant to the influence of ventilation and air cleaning on exposures to indoor-generated pollutants.