Fig. 4From: Inter and intra-reliability of ultrasonography for the measurement of abdominal subcutaneous & visceral adipose tissue thickness at 12 weeks gestationa & b Graphical comparisons of the measurements obtained for VAT by the two observers were made using Bland-Altman plots showing unlinked replicates (a). On the right; Plot of difference between measures of observer 1 and observer 2 against the mean of the two measurements of VAT (b). Solid line represents the mean; upper line shows the mean + 1.96 SD and lower line the mean − 1.96 SDBack to article page