dyspnoea indexA clinical measure of shortness of breath for determining exertion levels, which may be markedly increased in patients with pulmonary hypertension.
Levels of shortness of breath (SOB)
0—No SOB; can count to 15 (takes about 8 seconds) without taking a breath in the sequence.
1—Mild SOB; can count to 15 but must take one short breath in the sequence.
2—Moderate SOB; need to take 2 breaths to count to 15 in the sequence.
3—Definite SOB; must take 3 breaths in the sequence of counting to 15.
4—Severe SOB; unable to count or speak.