Table 5 Subgroup analysis of the Pearson correlation coefficient (PCC) with a 95% confidence interval using Wald methods between measurements from standard ultrasound device and portable ultrasound device for the horizontal axis of the bladder (HA), longitudinal axis of the bladder (LA), sagittal axis of the bladder (SA) and post-void residual volume (PRV). Caesarean delivery (CD), number (n), normal weight (NW), overweight (OW, including obesity), scan at the first day postpartum (S1PP), scan at the second day postpartum (S2PP), spontaneous vaginal delivery (SVD), vacuum-assisted vaginal delivery (VAVD).
SVD, n = 57 | VAVD, n = 15 | CD, n = 28 | NW, n = 62 | OW, n = 34 | S1PP, n = 43 | S2PP, n = 33 | Total, n = 100 | |
|---|---|---|---|---|---|---|---|---|
HA (cm) | 0.967 (0.897–1.036) | 0.962 (0.797–1.126) | 0.988 (0.927–1.048) | 0.966 (0.900-1.033) | 0.983 (0.918–1.049) | 0.963 (0.877–1.049) | 0.984 (0.919–1.049) | 0.973 (0.927–1.019) |
SA (cm) | 0.986 (0.940–1.031) | 0.986 (0.885–1.086) | 0.967 (0.869–1.066) | 0.981 (0.932–1.031) | 0.977 (0.900-1.054) | 0.978 (0.913–1.044) | 0.993 (0.948–1.037) | 0.980 (0.939–1.020) |
LA (cm) | 0.964 (0.891–1.036) | 0.980 (0.862–1.099) | 0.981 (0.907–1.056) | 0.981 (0.930–1.031) | 0.923 (0.785–1.062) | 0.977 (0.908–1.045) | 0.990 (0.939–1.042) | 0.973 (0.926–1.020) |
PRV (ml) | 0.988 (0.947–1.030) | 0.998 (0.955–1.040) | 0.989 (0.925–1.053) | 0.989 (0.949–1.029) | 0.988 (0.931–1.045) | 0.995 (0.964–1.026) | 0.992 (0.941–1.043) | 0.982 (0.952–1.012) |
