Using the participants as their own controls minimized the effect of the differences among the participants How does this affect the sample size needed Pressure ulcer area (mm) 2000 1500 1000 500 0 Baseline Visit 2 A H Visit 3 Mean data SE p 0 0001 Compared with baseline p 0 0001 compared with week...

Using participants as their own controls also known as a withinsubjects or repeated measures design can potentially reduce the effect of individual di ...

Using the participants as their own controls minimized the effect of the differences among the participants. How

Question:

Using the participants as their own controls minimized the effect of the differences among the participants. How does this affect the sample size needed?