Chance to kill percentage influenced by drain and slow?

[Molean]

Is the CTK percentage shown, known to be reasonably accurate?

Does the CTK take into account the drain attack of units? If so, is it just as accurate as without drain? Same two questions in regards to slow attacks.

[zookeeper]

Yes.

[Sangel]

If you look at the detailed damage calculations, you'll see that there are considerably more projected results in the drain/slow scenario. That's because a unit's expected damage taken is dependent not only by how many times the opponent hits, but also how many times the unit itself hits, and when. The CTK figure reflects this more involved calculation.