Table 5.
Measures of association between clinical parameters for clinical data regarding WGA 20–28. In (a) are presented the correlation coefficients for interval/ordinal scaled variables, while in (b) the results for nominal associations. Omitted associations (—) in (a) are due to unfeasibility or to the fact that they are present in (b), or vice versa. (a) Effect size for interval-ordinal and ordinal-ordinal variables (both using ρ). (b) Effect size for nominal-nominal (w) and nominal-ordinal/interval (η) variables.
| Parameter | WGAd | Amniotic fluid |
SNR consensus |
FECG consensus |
|---|---|---|---|---|
| Amniotic fluid | −0.28c | — | — | — |
| SNR consensus | — | −0.02 | — | — |
| FECG consensus | — | −0.03a | 0.14c | — |
| Parameter | Channel # |
WGA | Placenta position |
Amniotic fluid |
Fetal position |
|---|---|---|---|---|---|
| WGA | — | — | — | — | — |
| Placenta position | — | 0.99 | — | — | — |
| Amniotic fluid | — | — | 0.07c | — | — |
| Fetal position | — | 0.99 | 0.42c | 0.25c | — |
| SNR consensus | 0.34 | — | 0.76b | — | 0.79c |
| FECG consensus | 0.78c | — | 0.30c | — | 0.23c |
Note: significance level denoted as significant
a
(p < 0.05), very significant
b
(p < 0.01) and highly significant
c
(p < 0.001).
d
Repeated terms were excluded prior to effect size calculation.