Table 3

Values at the inflection point

Patients (n=45)Controls (n=21)p Value
Values are means (SD).
*IP, inflection point; V̇eqco2, ventilatory equivalent for carbon dioxide; V̇eqo2, ventilatory equivalent for oxygen.
Time to inflection (s)271 (110)502 (196)<0.0001
Vt (l)1.6 (0.3)2.2 (0.6) 0.0001
f (breaths/min)25.8 (5.8)20.7 (3.8) 0.0004
V̇E (l/min)40.0 (14.5)44.6 (10.8) 0.2
V̇E as % peak VE61.6 (14.4)50.5 (12.8)<0.004
V̇E as %MVV47.7 (11.8)39.0 (8.6) 0.003
V̇E/Vt slope before IP21.6 (6.8)15.8 (4.1) 0.0007
V̇eqo233.1 (6.6)19.9 (2.2)<0.0001
V̇eqco238.1 (5.4)24.8 (2.7)<0.0001
o2 (ml/kg/min)15.1 (3.5)26.9 (7.3)<0.0001
Borg score3.7 (2.2)2.8 (1.7) 0.1