Table 7.

Results from using the breath hold time (BHT) of < 25 as a potential screen to predict those with dysfunctional breathing.

	Dysfunctional Breathing Present	Dysfunctional Breathing Absent
BHT < 25	34	2
BHT ≥ 25	12	3

Dysfunctional Breathing defined as any one of the following:

Resting End-Tidal CO of < 35mmHg

Positive Hi Lo Breathing Assessment

Scoring above the threshold on either the Self-Evaluation of Breathing Symptoms Questionnaire (>25) or the Nijmegen Breathing Questionnaire (>22)

Sensitivity = 0.74 (0.69-0.77)

Specificity = 0.60 (0.18-0.93)

Positive LR = 1.85 (0.84-10.39)

Negative LR = 0.44 (0.24-1.73)