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Table 3 Factors affecting the chance of success of obtaining complete 2 + 20 ISUOG planes for foetal ultrasonographic screening

From: Success rate to complete optimal 20 + 2 ISUOG planes for foetal ultrasonographic structural screening during early second trimester pregnancy in Thailand

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)
  1. *The univariate, co-linearity and multiple logistic regression analysis