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Table 4 Change of statistical parameters before and after intervention

From: Impact of a training program incorporating cardiac magnetic resonance imaging on the accuracy and reproducibility of two-dimensional echocardiographic measurements of left ventricular volumes and ejection fraction

  Site A (n = 9) Site B (n = 6) Site C (n = 21) Site D (n = 5) Site E (n = 10) All (n = 51)
P1 P2 p P1 P2 p P1 P2 p P1 P2 p P1 P2 p P1 P2 p
CV (%)
 EDV 11.8 9.2 0.072 14.6 11.2 0.157 14.0 11.6 0.113 11.6 9.8 0.165 10.8 16.7 < 0.001 18.0 15.1 0.279
 ESV 16.2 11.9 0.107 19.9 14.5 0.070 17.6 17.0 0.784 13.0 12.7 0.919 14.3 23.0 0.002 24.7 20.8 0.761
 EF 11.0 10.9 0.957 13.9 14.9 0.786 9.9 15.5 0.005 9.4 9.3 0.987 8.7 14.6 0.008 13.1 15.3 0.022
CP
 EDV 0.57 0.59 0.760 0.57 0.55 0.859 0.53 0.49 0.384 0.23 0.50 0.038 0.24 0.54 < 0.001 0.46 0.53 0.043
 ESV 0.73 0.75 0.500 0.75 0.70 0.655 0.56 0.68 0.002 0.37 0.61 0.011 0.42 0.66 < 0.001 0.57 0.68 < 0.001
 EF 0.78 0.83 0.211 0.65 0.76 0.151 0.39 0.74 < 0.001 0.36 0.71 0.010 0.54 0.78 < 0.001 0.52 0.76 < 0.001
  1. P1 Protocol 1 (number of patients was 14), P2 Protocol 2 (number of patients was 14), EDV End-diastolic volume, ESV End-systolic volume, EF Ejection fraction, n, number of sonographers participating in both protocols