Which is better? "Evaluated A whether the risk is sufficiently decreased by xxx" or "Evaluated A to see if the risk is sufficiently decreased by xxx" это звучит нормально?

"Evaluated whether contraceptive training sufficiently reduced the risk of unplanned pregnancy by xx%."

"Evaluated contraceptive training as to its effect on unplanned pregnancy rates."

"Evaluated contraceptive training's reduction of risk of unplanned pregnancy."


"whether" might be the wrong word choice if you want to talk about a specific % number. It makes it sound more like a problem with only two opposite options. (Up or down, Reduction or expansion, growth or decline, etc)

Both "Risk reduced by" and "risk decreased by" sound natural, but my ear prefers "reduce" over "decrease" and I don't know why.

"Individuals with contraceptive training have a decreased risk of unplanned pregnancy."

"Evaluated contraceptive training to decrease risk of pregnancy by xx%"