So: half (1+5) of them made it at least 50 days without cancer, and the other half made it at least 50 days with a smaller tumor? This sounds excellent to me. I

So: half (1+5) of them made it at least 50 days without cancer, and the other half made it at least 50 days with a smaller tumor? This sounds excellent to me. I agree that the sentence you quoted is overselling, though.