Don't focus on the complicated ones (the old people) where things like 5-year survival rates are so muddled up in overlapping conditions and inevitable decline. I once presented at an ER at 4am as a 23yo with every symptom of appendicitis. They shaved me, but then the ultrasound tech arrived for work early. It turned out to be something else and I didn't need surgery. They admitted that 20% of diagnosed appendicitis turn out to be something else once they cut in, many still needing surgery but some no. Ten years later I related this story to another surgeon and he was downright angry at 20%. His hospital had that stat down to 10% (in men) and wanted it down to 5%. Those stats, basic conditions with standard treatments but perhaps a complicated diagnosis, are the better starting point. I'd bet good money that the hospital at 5% for appendicitis diagnosis is also doing better at the more complex stuff too.