Figure 3

k1/k2 ratios for expiratory and inspiratory twitches in the normal and OSA groups. There was no difference between the two groups for expiratory twitches while the ratio decreased significantly during inspiratory twitches in normals and increased in OSA subjects. Boxes identify the 25 to 75 th percentiles of the data with the median value indicated. Horizontal lines outside the boxes depict the 10 to 90 th percentiles. Closed circles represent outliers. *: significant difference between inspiratory and expiratory values.