A randomized-controlled trial is designed to compare duloxet…

A randomized-controlled trial is designed to compare duloxetine to sertraline for pediatric patients with severe anxiety. The primary outcome is the mean change on the 26-item Social Phobia and Anxiety Inventory for Children. The investigators determined they needed to enroll 160 participants to achieve 80% power to detect a mean change of 10% on the scale between groups using a two-sided alpha level of 0.05. Which of the following scenarios would INCREASE statistical power? (SELECT ALL THAT APPLY)

A randomized controlled trial compared standard duration var…

A randomized controlled trial compared standard duration varenicline use of 3-months to extended-use varenicline of 6-months. The trial randomized 200 patients in each arm. Which statistical test would be most appropriate to test for the difference in baseline systolic blood pressure between groups?

A study compared inhaled fluticasone (n=821), inhaled beclom…

A study compared inhaled fluticasone (n=821), inhaled beclomethasone (n=843), and inhaled budesonide (n=837) for the change in FEV1 among patients with. Which statistical test would be most appropriate to test for statistical significance of FEV1 between groups at the conclusion of the trial?