This. Yay you.
(but you left out the bits about “peacefully” and “screaming and terrified” which make it so much better…remember that next time you tell it. ;))
Hell, I don’t know. I have such a complex puzzle of genetic/family predispositions and lifestyle factors…not to mention random chance. 
Let’s see, my grandmother lived to be 100 in near perfect health despite smoking like a chimney and drinking moderately for at LEAST 70 years. Ate a lot of crap (I used to lecture her on her diet :o)
Bore 5 kids (at home), worked most of her life as an accountant and later, Sunday School teacher for 25 yrs, never went to the Dr., was very active until age 90 or beyond (I used to come visiting and be told…“Oh, MS. Frank, she left with her Cocker (spaniel) in that direction about an hour ago.” Very like the joke about “my grandmother started walking a mile a day when she was 70…we don’t know where the hell she is now” 
Died of old age and only got slightly loopy in the last couple of years. Sounds good to me.
(I miss you, Granny :)).
OTOH, she was married to an alcoholic who died before her (well, MOST did, but at age 60 or so, long AFTER she divorced him) and she lost 2 of her 3 sons to the disease. I myself have struggled with it (breaking the family pattern in that I am a female)
My mother, at 70, is diabetic, infirm, on 13 different prescriptions and overall a pathetic comparison to her mother at the same age or even decades later. 
Me? I’ve been a vegetarian/vegan for 15 yrs or so. Generally careful of my diet since I got old enough to choose. Spent 5 yrs or so cycling 60 miles a week. Smoked off and on since I was 15 or so. Drank enough to cover a few lifetimes in my time. Currently weaning myself off the tobacco (down to a pack a week or so), not drinking, eating mostly very well, and cycling again, as well as walking, swimming, skating, all sorts of the exercise that I know makes me feel and look better. 
Geez, as it stands. as I said, I have as many points against me as I have going for me. Heart attack seems as likely as the cancer I know I am, on the one hand, MORE prone to due to drinking and smoking but, OTOH, LESS prone to due to having breastfed 2 kids for years and eaten no red meat since 1994…
WTF. We ALL die, of something or not. No-one gets out of here alive, right?
My late DH died of lung disease (techinically, of cardiac arrest as he was going into surgery for the lung problems) due to both his occupational exposures (silkscreener/metal etcher) and his genetic condition, diagnosed late in life, which made him more vulnerable to such damage.
I could get run over by a bus tomorrow, develop some form of cancer or other life-threatening disease next month, drop dead in the shower next week from a stroke or heart attack or live to 100 in perfect health. 
Do I really want to know? Is it even possible TO know? I think not.
I prefer to live in blissful denial/ignorance (it’s cheaper;))