Table 4 Descriptive statistics and T-test of the difference (delta-value) between the results of the trained physicians with the standard ultrasound device (SUD) and of the students with the SUD and the portable ultrasound device (PUD), respectively: BPD: biparietal diameter, HC: head circumference, AC: abdominal circumference, FL: femur length, EFW: estimated fetal weight, SDP: single deepest pocket, SD: Standard deviation, df: degree of freedom
BPD (cm) | HC (cm) | AC (cm) | FL (cm) | EFW (g) | SDP (cm) | ||
|---|---|---|---|---|---|---|---|
SUD | Mean | −0.37 | −0.08 | −0.31 | 0.58 | 22.87 | 0.82 |
SD | 0.12 | 0.72 | 1.56 | 0.78 | 210.94 | 0.62 | |
T score | −3.23 | −0.44 | −0.76 | 2.89 | 0.42 | 1.32 | |
df | 14 | 14 | 14 | 14 | 14 | 13 | |
P value | 0.01 | 0.67 | 0.46 | 0.01 | 0.681 | 0.21 | |
Cohen’s d | 0.835 | −0.12 | −0.197 | 0.75 | 0.11 | 0.35 | |
PUD | Mean | −0.01 | 1.34 | −0.03 | 0.92 | 392.60 | 2.42 |
SD | 0.62 | 3.28 | 3.69 | 0.95 | 625.44 | 1.70 | |
T score | −0.83 | 1.58 | −0.03 | 3.76 | 2.43 | 5.55 | |
df | 14 | 14 | 14 | 14 | 14 | 14 | |
P value | 0.94 | 0.14 | 0.98 | 0.01 | 0.03 | 0.00 | |
Cohen’s d | −0.02 | 0.41 | −0.01 | 0.97 | 0.63 | 1.43 |