Population
Patients with panic disorder (n=22) and normal controls (n=18)
Design
Case-control
Authors
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Increased respiratory chaos may mark panic disorder; leaves open diagnostic or monitoring utility pending prospective validation.
Nonlinear measures of respiration such as APEN and LLE demonstrate increased respiratory irregularity and chaos in patients with panic disorder compared to normal controls.
Yeragani et al. (2002) studied this question.
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