Additional file 1.

Supplementary figure. 1 Relationship between BMI and the inspiratory and the expiratory signals. The high pass frequencies were determined for inspiration (circle) and the expiration (triangle). Linear regression analysis showed the following correlation between the BMI and the high pass frequencies: r² inspiration: 0.29 (p = 0.0046); r² expiration: 0.66 (p < 0.0001).

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Morenz et al. BMC Pulmonary Medicine 2012 12:8   doi:10.1186/1471-2466-12-8