From: Development of new measurement system of thoracic excursion with biofeedback: reliability and validity
Evaluator
A
B
C
BREATH
0.90 (0.82-0.94)
0.94 (0.90-0.97)
0.90 (0.83-0.95)
Tape measure
0.87 (0.78-0.93)
0.85 (0.75-0.92)