A researcher consented 400 subjects, but 12 dropped out of the study before it was completed. The rest finished the study. What was the sample retention rate?
a. 388
b. 38.8%
c. 3%
d. 97%
ANS: D
Sample retention rate formula = number subjects completing study ÷ sample size ? 100%.
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A patient is preparing to undergo an invasive procedure to manage his benign prostatic hyperplasia (BPH). The patient and health care provider have selected transurethral needle ablation (TUNA) as the preferred procedure
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