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Table 1 Demographics and CPET parameters of study population (n = 66)

From: Assessment of left ventricular preload by cardiac magnetic resonance imaging predicts exercise capacity in adult operated tetralogy of Fallot: a retrospective study

  TOF (n = 36) Control (n = 30) P value Adjusted P value*
Demographics     
Age 25.2 (19.5, 31.7) 27.8 (21.0, 32.8) 0.20  
Male 29 (80.6) 24 (80.0) 1.00  
BMI (kg/m2) 22.8 (21.0, 26.3) 23.2 (19.6, 25.6) 0.39  
Asymptomatic/NYHA I 30 (83.3) 30 (100.0) 0.03  
CPET parameters     
Max HR (beats/min) 172.5 (159, 178) 176.5 (168, 181) 0.257 0.429
Heart rate reserve (beats/min) 26.5 (8, 39) 15.5 (7, 20) 0.117 0.183
Max SBP (mmHg) 177 (150, 184) 192 (168, 210) 0.007 0.010
Max DBP (mmHg) 86 (78, 93) 82 (76, 97) 0.575 0.964
Max breathing reserve (L/min) 38 (21, 72.1) 47.8 (34.5, 61.3) 0.540 0.602
Mets 8.3 (7.1, 9.4) 9.9 (8.6,11.7) <0.001 <0.001
% predicted Mets (%) 85.0 (74.8, 93.9) 102.7 (91.1, 114.5) <0.001 <0.001
Peak oxygen consumption (ml/kg/min) 29.2 (25.5, 33.0) 34.5 (30.0, 41.0) <0.001 <0.001
% predicted peak oxygen consumption (%) 83.0 (72.0, 93.5) 102.7 (91.1, 114.8) <0.001 <0.001
Anaerobic threshold (ml/min) 1395 (1170, 1574) 1501.5 (1255, 1700) 0.231 0.211
Oxygen pulse pressure (ml/beat) 11.0 (8.8, 13.2) 13.7 (11.9, 16.2) 0.003 0.002
VE/VCO2 slope 26.0 (23.6, 27.3) 25.6 (24.1, 27.2) 1.00 0.576
Arrhythmias** 7 (19.4) 4 (13.3) 0.742 0.492
  1. Median and interquartile ranges are reported for continuous data and frequency and percentage for categorical data.
  2. *Adjusted for age and gender.
  3. **All were occasional ventricular or atrial ectopics.