Fig. 1.
Comparison at 17 (a) and 34 weeks (b) of pregnancy of the difference between total body water (TBW) as estimated by deuterium dioxide dilution (TBW D2O) and TBW as assessed by whole-body bioimpedance spectroscopy (TBW-BIS) with the mean of the two methods. In (c), the differences between the TBW changes over these two time points as assessed by the two methods are compared against the mean difference. Solid horizontal lines indicate the means of the differences and dashed lines the limits of agreement (mean difference ± 2 sd).