Figure 6. Loading inspiration leads to a diminution of complexity in airflow during inspiration in healthy subjects and during both inspiration and expiration and COPD patients.

Noise Limit value, largest Lyapunov exponent and correlation dimension values are given from top to bottom. Lo no inspiratory load; L20: loading inspiration with 20 cmH2O/L/sec. The boxes encompass the interquartile range with indication of the median, the whiskers delimit the 95^th percentile of the data distribution. Paired and unpaired Ttests.