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Table 1 Intra-operator and inter-operator agreement of IFA, MNM angle, FMA and PL distance

From: Ultrasonographic study of fetal facial profile markers during the first trimester

  operator 1 operator 2 operator 1 and 2
  mean 95 %LoA mean 95 %LoA mean 95 %LoA
IFA -0.02 -6.10 ~ 6.05 -0.95 -6.75 ~ 4.85 2.34 -4.57 ~ 9.25
MNM angle -0.08 -1.71 ~ 1.55 0.24 -1.39 ~ 1.87 -0.068 -1.53 ~ 1.39
FMA 0.11 -5.14 ~ 5.36 -0.43 -6.11 ~ 5.26 -1.49 -6.94 ~ 3.97
PL distance 0.003 -0.47 ~ 0.48 -0.05 -0.58 ~ 0.48 0.14 -0.51 ~ 0.79