Cardiopulmonary exercise test (CPET) cardiovascular responses at peak exercise comparing extremely preterm and control children
| Mod/sev BPD (mean±SD) | No/mild BPD (mean±SD) | Control (mean±SD) | |
|---|---|---|---|
| Exercise time (min:sec) | 6:52±2:01 | 8:33±2:12 | 7:45±1:39 |
| RQ | 1.07±0.086 | 1.07±0.84 | 1.07±0.081 |
| Heart rate (beats/min) | 175.8±14.9 | 178.1±19.1 | 182.5±15.5 |
| Work (W) | 89.2±32.4 | 104.5±33.2 | 109.6±35.8 |
| VO2peak (L/min) | 1.65±0.65 | 1.83±0.55 | 1.87±0.43 |
| VO2peak % predicted (%)† | 89.3±23.0 | 107.4±22.7 | 103.4±26.5 |
| VO2peak relative (mL/kg/min)† | 36.9±10.7 | 44.6±9.2 | 42.6±9.6 |
| VCO2peak (L/min)* | 1.71±0.62 | 1.98±0.65 | 2.03±0.49 |
Post hoc ANOVA one-way comparisons (mean±SE).
VO2peak relative: mod/sev BPD 5.73±1.94 L/min<control*; mod/sev BPD 7.72±2.02 L/min<no/mild BPD†.
VO2peak % predicted: mod/sev BPD 14±5%<control*; mod/sev BPD 18±5%<no/mild BPD†.
VCO2 peak: No statistically significant one-way differences.
*p<0.05; †p<0.01.
ANOVA, analysis of variance; BPD, bronchopulmonary dysplasia; mod/sev, moderate/severe; RQ, respiratory quotient; VCO2peak, peak carbon dioxide uptake; VO2, oxygen uptake.