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Table 4 Correlation between placental grading and presence of free-floating particles in amniotic fluid and distal femoral epiphyses and proximal tibial epiphyses and thalamic echogenicity and colon grading and lung to liver grading, and neonatal RDS

From: Values and validity of fetal parameters by ultrasound and Doppler as markers of fetal lung maturity

Parameter RDS Non-RDS Total
Placental grading
 0–I N (%) 14 (73.7) 19 (18.8) 33 (27.5)
 II N (%) 3 (15.8) 53 (52.5) 56 (46.7)
 III N (%) 2 (10.5) 29 (28.7) 31 (25.8)
 Total N (%) 19 (100.0) 101 (100.0) 120 (100.0)
 Chi-square χ2 = 24.169, P value = 0.001*
FFP
 +ve N (%) 7 (36.8) 84 (83.2) 91 (75.8)
 −ve N (%) 12 (63.2) 17 (16.8) 29 (24.2)
 Total N (%) 19 (100.0) 101 (100.0) 120 (100.0)
 Chi-square χ2 = 18.727, P value = 0.001*
DFE
 +ve N (%) 3 (15.8) 91 (90.1) 94 (78.3)
 −ve N (%) 16 (84.2) 10 (9.9) 26 (21.7)
 Total N (%) 19 (100.0) 101 (100.0) 120 (100.0)
 Chi-square χ2 = 67.553, P value = 0.001*
PTE
 +ve N (%) 1 (5.3) 92 (91.1) 93 (77.5)
 −ve N (%) 18 (94.7) 9 (8.9) 27 (22.5)
 Total N (%) 19 (100.0) 101 (100.0) 120 (100.0)
 Chi-square χ2 = 64.487, P value = 0.001*
Thalamic echogenicity
 Echogenic N (%) 5 (26.3) 78 (77.2) 83 (69.2)
 Echolucent N (%) 14 (73.7) 23 (22.8) 37 (30.8)
 Total N (%) 19 (100.0) 101 (100.0) 120 (100.0)
 Chi-square χ2 = 9.036, P value = 0.003*
Colon
 I N (%) 2 (10.5) 8 (7.9) 10 (8.3)
 II N (%) 11 (57.9) 36 (35.6) 47 (39.2)
 III N (%) 6 (31.6) 57 (56.4) 63 (52.5)
 Total N (%) 19 (100.0) 101 (100.0) 120 (100.0)
 Chi-square χ2 = 4.029, P value = 0.133
Lung/liver echogenicity
 Hypo-echoic N (%) 7 (36.8) 45 (44.6) 52 (43.3)
 Iso-echoic N (%) 7 (36.8) 28 (27.7) 35 (29.2)
 Hyper-echoic N (%) 5 (26.3) 28 (27.7) 33 (27.5)
 Total N (%) 19 (100.0) 101 (100.0) 120 (100.0)
 Chi-square χ2 = 0.687, P value = 0.709