Table 2.
The mean difference for the different comparisons for the total study population and for each of the three centres
| Total (n = 92) | Centre 1 (n = 21) | Centre 2 (n = 52) | Centre 3 (n = 19) | |
| pUS GP versus laptopa | −0.15 mm (−0.60 to 0.30) | 0.77 mm (±1.56) | −0.73 mm (±1.96) | 1.18 mm (±2.09) |
| pUS GP/cardiologist versus laptopa | 0.08 mm (−0.29 to 0.44) | 0.65 mm (±1.32) | −0.24 mm (±1.68) | 0.64 mm (±1.43) |
| pUS cardiologist versus laptopa | 0.11 mm (−0.10 to 0.32) | 0.57 mm (±1.29) | −0.09 mm (±0.93) | 0.19 mm (±0.66) |
| pUS GP versus pUS cardiologistb | −0.26 mm (±3.02) | 0.12 mm (±1.41) | −0.65 mm (±1.37) | 1.0 mm (±1.79) |
| pUS GP/cardiologist versus pUS cardiologistb | −0.05 mm (±2.68) | 0.00 mm (±1.50) | −0.18 mm (±1.38) | 0.45 mm (±1.04) |
In comparisons between the different scanners, the laptop scanner is considered the gold standard and the 95% CI of the mean difference is given for the total population and mean difference ± SD for each of the centres. In comparisons between different operators both using pUS, the 95% limit of agreement is given for the total population and mean difference ± SD for each of the centres. pUS GP, pUS performed and analysed by the GP; pUS cardiologist, pUS performed and analysed by the cardiologist; pUS GP/cardiologist, pUS performed by the GP and analysed by the second cardiologist; laptop, echocardiography performed and analysed by the cardiologist using a laptop scanner.
Data are mean difference and 95% CI for the total population and mean difference ± SD for each centre.
Data are mean difference and 95% limits of agreement for the total population and mean difference ± SD for each centre.