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. Author manuscript; available in PMC: 2010 Oct 1.
Published in final edited form as: Am J Kidney Dis. 2009 Jun 10;54(4):693–701. doi: 10.1053/j.ajkd.2009.03.018

Figure 2.

Figure 2

Effect of interdialytic weight gain on home BP changes. The weight gain category was interacted with the fixed effect of time. Home BP rises 0.4 mmHg/hour systolic and 0.13 mmHg/hour diastolic in the interdialytic period in those who gain median weight (2.35 kg over 2 days). In those who gain more weight the intercept systolic BP is lower (by 1.6 mmHg/kg systolic and 1.0 mmHg/kg diastolic) but the rate of rise is steeper (by 0.07 mmHg/hr/kg systolic and 0.025 mmHg/hr/kg diastolic). In those who gain less weight have a slower rate of rise in interdialytic BP. The point where BP is least influenced by weight gain is about 24 hours for systolic and 40 hours of diastolic BP. Thus, sampling home BP over each third of time elapsed after dialysis will give the most reliable estimates of interdialytic ambulatory BP.