Wow, the sexist double standards are ridiculous. Donald Trump is obese, old, and orange. Yet over 60% of respondents think he's in perfectly good health? The man is the human personification of coronary disease.
People aren't thinking like physicians or actuaries, though. They don't understand risk or physiology. Any candidate who was having coughing fits and fainting in public - any highly visible symptoms that get in the way of putting on the kind of performance that we have done to expect from national politicians - would suffer for it, regardless of the state of his or her general health compared to the other candidate.