The role of hyperventilation in panic disorder: a response to Ley (1991 (original) (raw)

First, Ley indicated that we were mistaken in our application of a two-tailed f-test when testing the hypothesis that breathing retraining plus cognitive restructuring would lead to a decrease in frequency of panic attacks. Our two-tailed t of 1.82 (d.f. = 11) was nonsignificant at an a level of 0.05, but Ley's one-tailed t of 1.82 (d.f. = 11) did reach the 0.05 level of significance. His criticism on this point is valid-a directional hypothesis calls for a directional test. However, we wish to point out that the efficacy of BRCR is rather limited when the remaining self-report outcome measures are considered. Of 8 self-report scales measuring psychological distress (agoraphobic fear and avoidance, general anxiety, depression, somatic complaints), only the scale assessing fear of bodily sensations shows a significant decrease from pre-to posttherapy [t(ll) = 2.13, P < 0.05, one-tailed; see in de Ruiter et al., 19891. Second, Ley discusses our finding that the BRCR treatment has led to a decreased respiratory rate (RR) and a decline in end tidal pC0, (petC0,).

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