Question: By using this sample as their own control group, these researchers were able to minimize the effect of differences among the participants and see the

By using this sample as their own control group, these researchers were able to minimize the effect of differences among the participants and see the effect of the intervention more clearly. What did this increase in the study? Pressure ulcer area (mm) 2000 1500 1000 500 0 Baseline Visit 2

Pressure ulcer area (mm) 2000 1500 1000 500 0 Baseline Visit 2 *A H Visit 3 Mean data SE * p

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