Table 3 Factors affecting the chance of success of obtaining complete 2 + 20 ISUOG planes for foetal ultrasonographic screening
Variables | Result | Prevalence rate ratio | 95% CI | P-value* | |
|---|---|---|---|---|---|
Incomplete | Complete | ||||
GA | 0.012 | ||||
> 20 weeks (%) | 14 (11.1) | 112 (88.9) | 1.2 | 1.031–1.294 | |
< 20 weeks (%) | 29 (23) | 97 (77) | |||
BMI | |||||
< 25 kg/m2 (%) | 22 (14.2) | 133 (85.8) | 1.1 | 0.969–1.238 | 0.126 |
> 25 kg/m2 (%) | 21 (21.6) | 6 (78.4) | |||
History of abdominal scar | 1.1 | 0.974–1.227 | 0.190 | ||
Yes (%) | 6 (11.1) | 48 (88.9) | |||
No (%) | 37 (18.7) | 161 (81.3) | |||
Myoma uteri | 1.2 | 1.143–1.282 | 0.306 | ||
Yes (%) | 0 | 5 (100) | |||
No (%) | 43 (17.4) | 204 (82.6) | |||
Placenta | 1.0 | 0.920–1.152 | 0.609 | ||
Anterior (%) | 21 (15.9) | 111 (84.1) | |||
Posterior (%) | 22 (18.3) | 98 (81.7) | |||
Presentation | 1.0 | 0.912–1.144 | 0.716 | ||
Non-cephalic (%) | 16 (16) | 84 (84) | |||
Cephalic (%) | 27 (17.8) | 125 (82.2) | |||
Sonographer | |||||
Staff (%) | 10 (26.3) | 28 (73.7) | 0.871 | 0.714-1.062 | 0.100 |
Resident and fellow (%) | 33 (15.4) | 181 (84.6) | |||